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Horticulture Principles and Practices

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color plate 18<br />

(b)<br />

(a)<br />

(d)<br />

(c)<br />

(f)<br />

(e)<br />

(g)<br />

Greenhouse irrigation: (a) Automated irrigation boom can be programmed to deliver<br />

different amounts of water to different crops as it travels the length of the greenhouse.<br />

(b) Overhead sprinkler irrigation system. (c) Irrigation carrousel for hanging baskets; an<br />

irrigation point can service an entire string of hanging baskets as they are automatically<br />

moved one-by-one past the irrigation point. (d) Components of a fertilizer <strong>and</strong> acid injection<br />

system. Bag Culture: (e) Tomato plants growing in rockwool bags; these plants<br />

are drip-irrigated. (f) Fruiting tomato plants; the spindly stems are supported by strings<br />

dropped from the roof. The two hot water pipes located on the floor between plant rows<br />

are also used as tracks fro carts for general maintenance <strong>and</strong> harvesting of fruits. (g) Ripe<br />

tomato fruits packaged for the market. (Sources: Photos a–d are courtesy of Dr. A.J. Both,<br />

Ph.D. Bioresource Engineering, Department of Plant Biology <strong>and</strong> Pathology, Rutgers<br />

University, New Brunswick, NJ: photos e–g, are courtesy of Dr. Louis D. Albright,<br />

Professor of Biological <strong>and</strong> Environmental Engineering <strong>and</strong> Stephen H. Weiss<br />

Presidential Fellow, Cornell University, Ithaca, NY.)

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