Production Practices and Quality Assessment of Food Crops. Vol. 1

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Fruit and Vegetables Harvesting Systems 277 Figure 13. Multidirectional shaker with one (orbital shaker) (a) and two (b) independent rotating masses. Figure 14. Forces created in a two rotating-mass inertia shaker.
278 M. Ruiz-Altisent et al. M: total mass (equivalent mass of the tree + mass of the shaker), kg c: damping factor, N.s/m k: elastic constant, N/m Being the maximum force: F max = 2mr ω 2 in case where m 1 ≅ m 2; r 1 ≅ r 2 and ω 1 ≅ω 2 = ω Approximately the amplitude of vibration results [12]: s = 2mr/M The equivalent mass of limbs M can be estimated as 0.2 kg per diameter-mm and for trunks as 2 kg per diameter-mm. Natural frequency, damping factor and elastic coefficient of the trees change with time of the year, between the following approximate values: f = 0.5–3.5 Hz c = 0.1–0.7 k ≤ 2000 N/cm Fruit detachment is, for any particular species and type of trees, the effect of a combination of: – stroke, – frequency and – pattern of vibration. Figure 15. Directions of vibration, depending on ω 1 and ω 2.
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Production Practices and Quality As
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Production Practices and Quality As
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CONTENTS Preface List of Authors Ef
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PREFACE Today, in a world with abun
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LIST OF AUTHORS Rufaro M. Madakadze
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EFFECT OF PREHARVEST FACTORS ON THE
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2.1. Temperature Effect of Preharve
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e beneficial to the water economy a
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Other responses that can also be ca
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06. Failure of fruits to ripen in t
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of more than 13 hours of night temp
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temperatures. Some show serious int
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Effect of Preharvest Factors 15 bet
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1) High rainfall conditions where B
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increase in the release of P i from
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however, more severe when foliage i
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temperatures and luxuriant growth a
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development of chilling injury symp
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conditions followed by sudden high
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season. The main environmental fact
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4.4.5.2. Water blisters Storage roo
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Effect of Preharvest Factors 33 REF
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Effect of Preharvest Factors 35 men
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EFFECTS OF AGRONOMIC PRACTICES AND
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Effects of Agronomic Practices 39 F
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Effects of Agronomic Practices 41 6
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Effects of Agronomic Practices 43 F
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Effects of Agronomic Practices 45 R
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MODELLING FRUIT QUALITY: ECOPHYSIOL
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Modelling Fruit Quality 49 the dens
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Is it the only level to be consider
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To calculate the hydrostatic pressu
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on an analysis of the biophysical p
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Modelling Fruit Quality 57 fructose
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Modelling Fruit Quality 59 Figure 4
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f(dd) = dd max - dd dd max - dd min
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which depends on climate and irriga
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distributed over the period during
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Modelling Fruit Quality 73 Pruning
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with Fo, Pe and Pr being local ‘d
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Modelling Fruit Quality 77 than in
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Modelling Fruit Quality 79 Dann, I.
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Modelling Fruit Quality 81 Huguet,
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SPRAY TECHNOLOGY IN PERENNIAL TREE
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Spray Technology in Perennial Tree
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With centrifugal energy systems dro
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fruit orchards is described as 1000
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According to Furness (2000), the nu
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sprayers which were developed prima
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air-blast sprayers in an attempt to
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Most agricultural chemicals have be
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educing dosage rates to one quarter
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CHESTNUT, AN ANCIENT CROP WITH FUTU
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2. WORLD AREA OF CHESTNUT AND PRODU
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Table 2. Chestnut production in the
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vineyards and north facing to chest
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Chestnut, an Ancient Crop with Futu
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Table 5. Continued. Chestnut, an An
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Table 6. Continued. Chestnut, an An
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size. When the trees develop too mu
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6.5. Management of old orchards Che
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the disease is already established
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where ink disease is rampant, disea
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8.4. Micropropagation Several in vi
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9.3. Hybrids Chestnut breeding in E
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IMPROVEMENT OF GRAIN LEGUME PRODUCT
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Improvement of Grain Legume Product
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2.8. Field experiments The greenhou
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IMPACT OF OZONE ON CROPS S. DEL VAL
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Impact of Ozone on Crops 191 observ
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Impact of Ozone on Crops 193 1996).
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Impact of Ozone on Crops 195 Figure
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Impact of Ozone on Crops 197 al., 1
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Impact of Ozone on Crops 199 techni
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species show a progressive decline
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Impact of Ozone on Crops 203 Chaime
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Impact of Ozone on Crops 205 Junge,
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Impact of Ozone on Crops 207 Polle,
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SAFFRON QUALITY: EFFECT OF AGRICULT
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1.2. Commercial interest Saffron Qu
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1.3. Uses Saffron Quality 213 There
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oriental-type perfumes (Sampathu et
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Saffron Quality 217 Figure 5. Chemi
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Straubinger et al., 1997; Straubing
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and Micheli, 1979; Curro et al., 19
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Saffron Quality 223 Figure 9. Chemi
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(1984) gives the following data: δ
Page 238 and 239: Saffron Quality 227 Table 3. HPLC a
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Page 242 and 243: Saffron Quality 231 Saffron in fila
Page 244 and 245: Saffron Quality 233 sium were the q
Page 246 and 247: Saffron Quality 235 Figure 11. The
Page 248 and 249: Saffron Quality 237 Figure 12. Harv
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Page 252 and 253: and Micheli, 1979a; Sampathu et al.
Page 254 and 255: Saffron Quality 243 Table 8. Drying
Page 256 and 257: Saffron Quality 245 space for sorti
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Page 260 and 261: Saffron Quality 249 The effect of
Page 262 and 263: Saffron Quality 251 Table 10. Effec
Page 264 and 265: Saffron Quality 253 Alonso, G. L.,
Page 266 and 267: Saffron Quality 255 Escribano, J.,
Page 268 and 269: Saffron Quality 257 tion combined w
Page 270 and 271: Saffron Quality 259 Selim, K., M. T
Page 272 and 273: FRUIT AND VEGETABLES HARVESTING SYS
Page 274 and 275: 3. PRINCIPLES AND DEVICES FOR THE D
Page 276 and 277: exert a vertical pulling force to t
Page 278 and 279: Fruit and Vegetables Harvesting Sys
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Page 290 and 291: To calculate the number of directio
Page 292 and 293: For the cleaning and separation of
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