Horticulture Principles and Practices

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TABLE 21–1 Popular Herbs and Their Parts Used Plant Scientific Name Parts Used Bay Laurus nobilis Leaves Basil (sweet) Ocimum basilicum Leaves Chives Allium schoenaprasum Leaves Cumin Cuminum cyminum Seeds Coriander Coriandrum sativum Leaves or seeds Dill Anethum graveolens Leaves Ginger Zingiber officinale Root Mint Mentha spp. Leaves (seasoning or tea) Marjoram (sweet) Origanum marjorana Leaves Oregano Origanum vulgare Leaves Parsley Petroselinum crispum Leaves (seasoning or garnish) Rosemary Rosemarinus officinalis Leaves Sage Salvia officinalis Leaves Thyme Thymus vulgaris Leaves Sometimes herbs are ground into a thick slurry and applied to parts of the body for a variety of purposes. Using herbs for medicinal purposes should only be on the advice of qualified practitioners and is discouraged for pregnant women. 21.1.2 ORNAMENTAL Herbs have great decorative value in the landscape. They may be used in edging, for either their attractive foliage (e.g., sage, rosemary, lavender, and thyme) or color (e.g., parsley, chives, and pot marigold). Plants such as sage, hyssop, bushy thyme, and lavender can be trimmed to amenable sizes and attractive shapes. 21.1.3 FRAGRANCE Part of the use of herbs in the landscape is to provide pleasing scents in the environment. Herbs are known for their scents, which emanate from flowers and foliage. Some of the most notable herbs with sweet scents include thyme, lavender, rosemary, and rosebuds. Certain herbs are cut and dried (leaves and flowers) and included in the mixture used to make potpourri, which is widely used in perfuming indoor environments. 21.1.4 CULINARY A number of herbs are used in cooking to add their characteristic flavors to foods. Fresh leaves, where available, may be picked and added to foods for this purpose; dried forms may be purchased in stores for culinary use. Flowers of chives and borage, among others, may be used in salads, and seeds of dill, coriander, and cumin are good flavoring aids. Certain herbs are dried and used in brewing teas (herb teas), which have refreshing and medicinal values. Apart from these common uses, certain herbs such as hyssop, clover, thyme, and sage have flowers that attract insects such as bees and butterflies. Others, such as tansy, pyrethrum, and santolina, on the other hand, repel insects with their scent. 21.2 CULTIVATION 21.2.1 SITE SELECTION Herbs grow vigorously and attain the most flavor when exposed to full sun. The soil must be well drained with a neutral to alkaline soil reaction. Clay and sandy soils should be avoided since they present water-related problems in cultivation, clays being prone to waterlogging and sandy soils being prone to drying out. Many herbs are adapted to marginal soils. Cultivation 647
648 Chapter 21 Herb Gardening 21.2.2 SOIL PREPARATION Raised beds should be used where drainage is poor. If required, soils should be limed to reduce acidity. Herbs may be grown in containers in the kitchen using regular potting mixes; such herbs are readily accessible for culinary use (Figure 21–1). 21.2.3 DESIGN OF AN HERB GARDEN Herbs, as mentioned previously, have both ornamental and culinary uses. For ornamental purposes, and like other ornamental species, herbs may be set in a formal design in the landscape by judiciously selecting species according to the principles of landscaping. Herbs may be arranged in a fashion similar to bedding plants. In herb gardening, themes are important in creating attractive designs. These themes should take into account the adaptive characteristics, along with growth habits and other botanical features such as flower color. A popular design is the checkerboard, in which the site is divided into squares with walkways between squares and each square planted with one species. 21.2.4 PROPAGATION The most common method of propagation of herbs is by seed. Herbs have not received the attention that vegetables and many important field crops have from the standpoint of breeding and improvement. As such, wild characteristics may be present in some species, making their germination unpredictable and sometimes very poor. Species with some degree of germination problems include rosemary, lavender, catnip, mint, and winter savoy. Instructions on seed packs should be followed with care. Vegetative propagation (by cuttings or division) may be used in propagating certain seed-bearing plants; it is the only method for seedless species such as French tarragon. Mints are widely used in the confectionery industry and have received some attention in terms of improvement. They are often propagated from division of rootstocks and runners to make them come true to type. Tansy and bergamot are also propagated from root division. 21.2.5 CARE Herbs, being relatively wild, are quite hardy and can be produced on marginal soils, eliminating or reducing the need for additional fertility in cultivation in many cases. Herbs, such as basil, chives, and parsley, whose foliage is frequently cut benefit from moderate fertilization. Mulching improves moisture retention and suppresses weeds. Herbs grown in restricted areas in containers generally need more attention than those grown in beds. They are more likely to experience moisture stress and also more prone to danger from excessive moisture. Herbs that do best indoors are those with preference for low light, unless artificial light supplementation is provided. They may be grown in window boxes or hanging baskets. Few diseases and pests are a problem in herb cultivation. Chives and mints are known to be susceptible to rust attacks. Under damp conditions, fungal diseases such as molds, mildews, and rots may occur on some herbs, as is generally the case in many plants in cultivation. 21.2.6 HARVESTING AND DRYING Herbs may be used fresh or cut and dried. For culinary uses as seasonings, young leaves should be picked. Plants attain peak flavor when flowers open, which is the best time for harvesting for drying of stems and leaves. The plants to be dried are cut when leaves exhibit no moisture. Slow drying at low temperatures produces the best results. Drying is done not in the sun but in a well-ventilated dry room or in an oven at low temperature. This drying condition helps to retain the green color, essential oils, and aroma of the leaves and stems. Seeds are harvested when brown or black by cutting the stems. The stems are then hung upside-down over a receptacle so that
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HORTICULTURE Principles and Practic
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HORTICULTURE Principles and Practic
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With love to Theresa, quarterback;
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Brief Contents Preface xxi PART 1 T
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Contents Preface xxi PART 1 THE UND
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5.3 PLANT GROWTH PROCESSES 160 5.4
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8.20 COMMON GREENHOUSE DISEASES 276
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12.3 INTERNAL ENVIRONMENTAL CONTROL
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PART 6 Summary 541 References and S
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22.18 INDOOR COMPOSTING SYSTEMS 668
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Preface Horticulture is the area of
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ACKNOWLEDGMENTS I am very grateful
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PART 1 THE UNDERLYING SCIENCE CHAPT
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1 What Is Horticulture? PURPOSE AND
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(a) (c) (b) (d) FIGURE 1-1 The many
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FIGURE 1 Bridge. The plaza view of
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CYCADS Many people mistake these pr
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FIGURE 2 The world's largest unbran
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FIGURE 2 Sold flowers are loaded on
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FIGURE 1-4 Formal landscaping featu
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1.4 ROLEOFTHENURSERY AND SEED INDUS
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1.5 HORTICULTURE AND SOCIETY Hortic
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TABLE 1-3 U.S. Horticultural Export
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Turfgrass Operation 1. Landscape te
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What Is Horticulture? This site pro
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Examples of botanical gardens http:
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2 Classifying and Naming Horticultu
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Eight major taxa are commonly used
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TABLE 2-3 The Divisions of the King
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HISTORY OF PLANT TAXONOMY PAUL R. F
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AGE OF HERBALISTS Two major events
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possible system of nomenclature. Ho
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TABLE 1 Type Categories for Plant N
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2.3 OTHER CLASSIFICATION SYSTEMS (O
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2. Shrubs. A shrub has no main trun
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Simple Fruits Fleshy Fruits Drupe B
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FIGURE 2-14 A pome, represented by
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2.3.5 CLASSIFICATION OF VEGETABLES
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(a) (b) FIGURE 2-22 (Source: George
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FIGURE 2-25 A narrowleaf plant. (So
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FIGURE 2-29 Parts of a typical gras
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such as rosemary, sage, thyme, marj
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c. Leaves d. Bulbs 2. Cut across (t
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Whole plant Organs FIGURE 3-1 Level
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ibonucleic acid (RNA), proteins, an
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called cristae; this extreme foldin
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By virtue of its position, the prim
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Phloem Tissue Structurally, phloem
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(a) Stalk (b) Culm FIGURE 3-5 Cross
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Scale Compressed stem (a) Whole bul
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Upper epidermis Palisade layer FIGU
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usually occur in xerophytes. In cer
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FIGURE 3-22 Selected common leaf ma
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FIGURE 3-25 Selected common leaf ti
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absorption of water and minerals fr
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Outer bark Inner bark FIGURE 3-37 T
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Anther Filament Stamen FIGURE 3-41
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Exocarp Parts of a typi- FIGURE 3-4
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PRACTICAL EXPERIENCE LABORATORY 1.
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4.1 CLIMATE, WEATHER, AND HORTICULT
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concentration in the atmosphere.A c
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TABLE 4-1 Climatic Adaptation of Se
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and upward. Another important gener
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Rate of photosynthesis mg/sq. dm/hr
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and plants that flower under only c
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times of the year. Growers start th
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content. This section is sometimes
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TABLE 4-7 Soil Mineral Nutrients Es
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Micronutrients (Trace Elements) Mic
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Neutral FIGURE 4-11 A representatio
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4.4 FERTILIZERS Fertilizer sources
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One of the most commonly used contr
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Chlorosis (the yellowing of green l
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Fertilizers may be applied before p
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It is neither practical nor safe to
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Solution: How much of ammonium nitr
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1°C (34°F), the optimum temperatu
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Cellulose sponge Perched water tabl
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Overhead Sprinkler Irrigation Water
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FIGURE 4-19 Furrow irrigation of le
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can self-install an underground irr
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1. Surface drainage. Surface draina
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Secondary Tillage Primary tillage i
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(a) (b) (c) (d) FIGURE 4-20 (Source
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texture. The most commonly used gra
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TABLE 4-11 Selected Standard Mixes
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Steam Pasteurization Steam pasteuri
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Maracher, H. 1986. Mineral nutritio
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5 Plant Physiology PURPOSE AND EXPE
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Growth in an organism follows a cer
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5.1.2 THE ROLE OF SIGNALS IN GROWTH
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waxes are embedded. Waxes consist o
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5.3.1 PHOTOSYNTHESIS Photosynthesis
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CO 2 FIGURE 5-6 The C 4 pathway of
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Growth and Development The general
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TABLE 5-2 Energy Produced from Aero
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Certain plants are adapted to dry e
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conditions exist to sustain growth
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Shoot Elongation In certain plants,
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for success, since high temperature
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FIGURE 5-13 Ripening of plantain sh
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Terminal bud removed Unbranched pla
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conditions—pertaining to light, m
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them to maturity. The major process
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6 Breeding Horticultural Plants PUR
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Similarly, there can be no plant br
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APPLICATION, CHALLENGES, AND PROSPE
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hit with target DNA. Therefore, it
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Generally, within ten days of exper
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Aziz A.N., Sauve R.J., Zhou S., 200
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(b) F 1 Rr Rr round round F 2 RR R
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e.g., Aa × Aa), the lethal allele
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eeder’s equation. Simply stated,
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Before the seed or product becomes
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6.18.2 THE GENERAL STEPS OF RDNA TE
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2. Political disagreement. There ar
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REFERENCES AND SUGGESTED READING Ac
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PART 2 PROTECTING HORTICULTURAL PLA
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7 Biological Enemies of Horticultur
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8. Weeds may clog drains, waterways
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is also a root parasite that obtain
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LEGISLATIVE Both state and federal
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Example Integrated cultural, physic
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7.4.2 IMPORTANT INSECT ORDERS Insec
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Egg FIGURE 7-3 Life cycle of an ins
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sucking insects (also found with so
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FIGURE 7-12 Corn earworm damage. (S
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TABLE 7-1 Selected Fungal Diseases
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7.6.1 SMALL ANIMALS Rabbits, mice,
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FIGURE 7-16 The disease triangle. P
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fungitoxic exudates in its leaves,
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SUMMARY Insects are a major class o
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For the home growers or those who c
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for consumers and the environment).
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TABLE 8-1 Strategy 4: Strategies an
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gibberellic acid spray overcomes st
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In a competitive industry, a variet
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Chemicals gain access to humans thr
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2. Pesticide management. Controllin
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Every organism has its natural enem
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TABLE 8-3 Selected Examples of Biol
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1 2 YEAR 3 4 FIGURE 8-5 cycle. A cr
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6. Heat treatment. In the greenhous
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Organic Compounds (Organics) Organi
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under enclosed conditions (e.g., wa
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FIGURE 8-9 A tractor-mounted spraye
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8.11.9 LANDSCAPE PESTS AND THEIR CO
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application, a particular herbicide
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Further, they do not provide unifor
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SUMMARY Herbicides are chemicals us
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Sulfur may be applied for both prev
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8.23 PREVENTING GREENHOUSE DISEASES
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PART 3 PROPAGATING HORTICULTURAL PL
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9 Sexual Propagation PURPOSE AND EX
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Anther Microspore Megaspore mother
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Lettuce seeds Red light Darkness Fa
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FEDERAL AND STATE SEED LAWS Federal
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Germination Test In laboratory prac
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FIGURE 15 The essential structures
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processing into flour or meal). How
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physiologically immature seeds must
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seeds may be treated in this way be
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The two basic modes of seedling eme
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locations in the field. Home garden
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FIGURE 9-9 A plastic flat. (Source:
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(a) (b) FIGURE 9-12 (a) Sowing seed
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y the gardener or grower. Whatever
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REFERENCES AND SUGGESTED READING Co
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species enables vegetative propagat
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for rapid rooting. There are two ba
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Cutting involving one node (e.g., s
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This practice is especially importa
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10.6.4 STICKING THE CUTTING Cutting
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(a) Indexing by budding Diseased pl
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10.11 M ETHODS OF GRAFTING Grafting
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Scion Wax FIGURE 10-17 Steps in bar
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MODULE 3 BUDDING 10.12 TYPES OF BUD
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MODULE 4 LAYERING 10.13 TYPES OF LA
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Buried part of shoot is nicked FIGU
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variety of ways. In air layering, a
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FIGURE 10-34 by using cormels. Prop
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Psuedobulbs In the Dendrobium orchi
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The technique is used widely in cro
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PART 4 GROWING PLANTS INDOORS CHAPT
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11 Growing Houseplants PURPOSE AND
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TABLE 11-1 Common houseplants Commo
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Saddle leaf Philodendron selloum To
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Window Displays Plants in windows e
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CONTAINER GARDENS DR. TERRI W. STAR
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annuals and hardy perennial species
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of the large container filled with
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perfection about four to six weeks
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FIGURE 11-6 Flowers displayed on th
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TABLE 11-5 Plant Selected Plants fo
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The lighting condition near these w
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Fluorescent Lights Fluorescent ligh
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may be used for one pot or a group
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garden rooms, atriums, or a large c
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The photoperiod affects when the ho
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patted firm to keep the plant erect
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Other Materials Apart from clay and
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(a) ( FIGURE 11-25 Support for plan
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TABLE 11-7 Common Problems of House
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• Keep soil moist all the time
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• Prefers high temperatures • P
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amount and quality of light. If sup
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12 Controlled-Environment Horticult
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6. Curvilinear 7. Curved eave 8. Do
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Detached greenhouses have several a
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12.2.3 FRAME DESIGN There are two b
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horticultural business a less-expen
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Texas, Hawaii, and California. The
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source of heat for times when the t
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FIGURE 12-17 Greenhouse production
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FIGURE 12-21 Moving tables allowing
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Research program on greenhouse engi
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greenhouses equipped with a variety
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FIGURE 1 Annual energy required per
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This system was demonstrated in a 5
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FIGURE 6 Amounts of waste energy ut
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Ekholt, B.A., D.R. Mears, M.S. Gini
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or object to be warmed. Failure to
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objects in its path (e.g., the floo
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FIGURE 12-27 Motorized ventilation
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FIGURE 12-30 Movable internal shade
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FIGURE 12-33 A high pressure sodium
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Source of Water The quality of loca
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FIGURE 12-37 Overhead sprinkler irr
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Intermittent Feed Greenhouse plants
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However, in winter, greenhouse vent
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OUTCOMES ASSESSMENT 1. Explain the
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. Foliage or green plants. Foliage
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2. Labor. The size of the labor for
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FIGURE 13-1 Greenhouse production o
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FIGURE 13-2 Lettuce plug is inserte
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13.8.4 AGGREGATE HYDROPONIC SYSTEMS
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(a) (b) (c) FIGURE 13-6 Plug produc
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14 Growing Succulents PURPOSE AND E
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FIGURE 14-3 Leaf succulent represen
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frost-hardy. Their rosettes are usu
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TABLE 14-1 Plant Selected Popular S
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(a) (b) FIGURE 14-12 Typical bromel
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14.7.1 WHAT ARE CACTI? 14.7 CACTI C
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FIGURE 14-16 Opuntia. (Source: Crai
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FIGURE 14-23 Mammillaria. (Source:
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FIGURE 14-28 Both desert and jungle
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Growing mix Gravel Cacti (a) (b) FI
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PART5 GROWING PLANTS OUTDOORS: ORNA
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15 Principles of Landscaping PURPOS
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8. Create recreational grounds. Suc
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knowledge, with concern for resourc
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(a) (b) (c) FIGURE 15-2 The occurre
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GUIDELINES FOR LANDSCAPE DESIGN DAV
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the landscape. Some very successful
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Rhythm and Line Panoramic view of a
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FIGURE 15-10 A formal garden. The e
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How frequently do they entertain? A
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the patio should be located on the
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15.7.1 SELECTING PLANTS A homeowner
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Plant Arrangement in the Landscape
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Shadow FIGURE 15-15 Planting a tree
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SUMMARY Landscaping enhances the su
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3. Supply materials on a timely bas
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such as preparation rooms (for mixi
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of environmental fluctuations. Furt
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FIGURE 16-4 A bare-root tree seedli
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17 Installation of the Landscape PU
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for walks, driveways, and patios (F
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Planting may be limited to accentin
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17.3.3 PREPARING THE BED The soil s
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FIGURE 17-4 Bedding plants raised i
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SUMMARY Bedding plants are largely
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TABLE 17-6 Selected Ground Covers T
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TABLE 17-7 Selected Ornamental Gras
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they determine the success and surv
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12. Wildlife attraction. Trees in t
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pennsylvanica), hackberry (Celtis s
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y winds. A stake, which is often a
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TABLE 17-8 Selected Narrowleaf Ever
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TABLE 17-11 Selected Deciduous Shru
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Blooming bushes 1. Blue mist shrub
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Planting Bulblets and Bulbils Speci
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may be divided such that each secti
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FIGURE 18-1 (Source: George Acquaah
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Cool-Season (Temperate) Grasses In
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Growth Habit Turfgrasses are the mo
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Heavy Use Lawns on playgrounds and
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The seed should be free from weeds
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Source of Sod As with seed, sod sup
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A plug of sod FIGURE 18-7 Plugging
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way, plants are able to adapt to th
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form of a can placed on the lawn wi
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TABLE 18-3 Some Common Lawn and Tur
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even surface soil surface for layin
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MacCaskey, M. 1987. All about lawns
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Pruning is sometimes done in conjun
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4. Pruning may be done to reduce th
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19.4.2 SAWS A saw may be designed t
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defeat the purpose of pruning. The
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Bud withers as cut end dries back d
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19.6 STRATEGIES FOR PRUNING ABOVEGR
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Rejuvenation Pruning Cut canes to a
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3. In the third and subsequent year
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(a) Cut Prune (b) FIGURE 19-16 Step
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Eucalyptus and Paulownia are amenab
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TRAINING & PRUNING DECIDUOUS FRUIT
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Summer pruning eliminates an energy
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a) b) FIGURE 2 Newly planted apple
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FIGURE 6 Wooden limb spreaders can
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FIGURE 9. An apple tree trained to
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Page 624 and 625: Horizontal Espalier The horizontal
Page 626 and 627: 19.16.1 CANE FRUITS Cane fruits are
Page 628 and 629: FIGURE 19-26 Shearing of Christmas
Page 630 and 631: pyramid-like form that is wider at
Page 632 and 633: After selecting the appropriate spe
Page 634 and 635: PART 6 GROWING PLANTS OUTDOORS: VEG
Page 636 and 637: 20 Growing Vegetables Outdoors PURP
Page 638 and 639: The National Agricultural Statistic
Page 640 and 641: (This item omitted from WebBook edi
Page 642 and 643: growers should take to determine an
Page 644 and 645: pests and reduce/ eliminate hail da
Page 646 and 647: square yard (10 to 68 grams per squ
Page 648 and 649: High tunnels help increase the prof
Page 650 and 651: (This item omitted from WebBook edi
Page 652 and 653: 20.4 VEGETABLE MARKET TYPES Fresh V
Page 654 and 655: Establishing the Crop Planting into
Page 656 and 657: home water supply from the tap. Thi
Page 658 and 659: Cole crop Cabbage Root Potato Bean
Page 660 and 661: 6. Adequate nutrition. While overfe
Page 662 and 663: variable, ranging from creamy yello
Page 664 and 665: There are two general production pr
Page 666 and 667: This toxin is heat resistant and no
Page 668 and 669: large, or jumbo. The bulb may be sw
Page 670 and 671: REFERENCES Growing selected vegetab
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Page 676 and 677: 22 Organic Farming PURPOSE AND EXPE
Page 678 and 679: 22.3 PRINCIPLES OF ORGANIC FARMING
Page 680 and 681: and the specific materials to be us
Page 682 and 683: 22.8 MANAGING SOIL PHYSICAL QUALITY
Page 684 and 685: preemergent or early postemergent o
Page 686 and 687: Composting is a deliberate activity
Page 688 and 689: 22.14.5 THE CARBON-TO-NITROGEN RATI
Page 690 and 691: Moisture Supply Water is required b
Page 692 and 693: Compost materials FIGURE 22-4 a wir
Page 694 and 695: As microbial decomposition proceeds
Page 696 and 697: Establishment and Management of an
Page 698 and 699: night, freezing can occur in spring
Page 700 and 701: accomplished by stratification. It
Page 702 and 703: transmitted by the dagger nematode
Page 704 and 705: PART 7 SPECIAL TECHNIQUES AND HANDL
Page 706 and 707: 24 Cut Flowers and Floral Design PU
Page 708 and 709: to more than four-fold in standard
Page 710 and 711: Temperature and Humidity Wilting re
Page 712 and 713: FLORAL DESIGN: AN OVERVIEW BY WM. J
Page 714 and 715: Principle Definition Types (or Uses
Page 716 and 717: pH value-a measure of the acidity o
Page 718 and 719: FIGURE 6 Parallel Design-Parallel d
Page 720 and 721: 24.3.2 TOOLS AND MATERIALS The tool
Page 722 and 723:
3. Establish the focal point. 4. Ad
Page 724 and 725:
Natural Drying To dry naturally, fl
Page 726 and 727:
24.4.3 DRIED FLOWER ARRANGEMENTS Dr
Page 728 and 729:
25 Terrarium Culture PURPOSE AND EX
Page 730 and 731:
FIGURE 25-3 Terrarium containers ar
Page 732 and 733:
FIGURE 25-5 Assortment of tools use
Page 734 and 735:
25.6.7 ENHANCING THE DISPLAY Certai
Page 736 and 737:
(a) (b) FIGURE 26-1 Bonsai can be c
Page 738 and 739:
TABLE 26-3 Plant A Selection of Pop
Page 740 and 741:
26.3.1 COLLECTING BONSAI PLANTS FRO
Page 742 and 743:
Strip bark Bare branch FIGURE 26-9
Page 744 and 745:
26.5.2 SANITATION It is critical to
Page 746 and 747:
27 Postharvest Handling and Marketi
Page 748 and 749:
whereas oranges are picked (they ha
Page 750 and 751:
(b) (a) (c) (d) (e1) (e2) (f) FIGUR
Page 752 and 753:
To reduce packaging injury, contain
Page 754 and 755:
is replaced by the by-product of re
Page 756 and 757:
Stored produce may lose some color,
Page 758 and 759:
with pricing. When selling by volum
Page 760 and 761:
(a) (b) FIGURE 27-5 Horticultural p
Page 762 and 763:
APPENDIX A Temperature: Converting
Page 764 and 765:
APPENDIX B Metric Conversion Chart
Page 766 and 767:
APPENDIX D Common and Scientific Na
Page 768 and 769:
Pecan (Carya illinoensis) Peony (Pa
Page 770 and 771:
GLOSSARY A Abaxial Turned away from
Page 772 and 773:
Cellulose A complex carbohydrate th
Page 774 and 775:
Floriculture The science and practi
Page 776 and 777:
M Macronutrient An essential elemen
Page 778 and 779:
Root cap A mass of hard cells cover
Page 780 and 781:
INDEX A-frame, 395 A-horizon, 108 A
Page 782 and 783:
defined, 390 fertilization, 432-434
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Radiant heaters, 378 Radicle, 90 Re
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color plate 1 (a) (b) (c) (d) (e) M
Page 788 and 789:
color plate 3 (b) (a) (c) (d) (e) (
Page 790 and 791:
color plate 5 (a) (b) (d) (c) (e) (
Page 792 and 793:
color plate 7 (b) (c) (d) (a) (e) (
Page 794 and 795:
color plate 9 (a) (b) (c) (d) (e) (
Page 796 and 797:
color plate 11 (a) (c) (b) (d) Grow
Page 798 and 799:
color plate 13 (a) (b) (c) (d) (e)
Page 800 and 801:
Page 802 and 803:
Page 804 and 805:
Page 806 and 807:
color plate 21 (a) (b) (c) (e) (d)
Page 808 and 809:
color plate 23 (c) (b) (a) (d) (e)
Page 810 and 811:
color plate 25 (c) (a) (b) (d) (e)
Page 812 and 813:
color plate 27 (a1) (a2) (b2) (b1)
Page 814 and 815:
Page 816 and 817:
color plate 31 (a) (b) (c) Floral d
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Horticulture Principles and Practices

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