Greenhouse Technology and Management by Nicolás Castilla

By Nicolás Castilla

Greenhouse cultivation has accelerated in contemporary many years with elevated call for for meals construction and newly constructed applied sciences to enhance techniques. This ebook, which concentrates on plant construction grown in plastic greenhouse stipulations, covers turning out to be suggestions resembling fertilization and plant defense and up to date applied sciences and administration practices. It additionally takes an built-in method of greenhouse construction addressing matters resembling economics, advertising and creation strategies.

This is the English version of the winning Spanish e-book released via Ediciones Mundi-Prensa, Madrid, and grants content material appropriate to Spanish and world wide creation.

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The ea is usually lower at ambient temperature than its corresponding saturation value (es). Dew point is the temperature at which the air water vapour starts to condense, due to reaching saturation. In greenhouses, this condensation starts on the coldest objects, initially on the greenhouse roof cover and walls. The evapotranspiration (ET) integrates the water evaporated from the soil and that transpired by the vegetation.

Plate 30. Cut flowers are another greenhouse product option. 91383 Castilla Plates_Layout 1 22/11/2012 18:40 Page 16 31 32 Plate 31. When considering crop options, selection of species with lower thermal requirements (lettuce is shown in the image) prevail in colder areas or during the cold season. Plate 32. The location of greenhouses is a key issue, both for its influence on production costs (depending on the climatic conditions) and for its effect on the transport costs to the markets. Image shows the Poniente area (Almeria, Spain).

The incidence of direct solar radiation at noon in the south of Spain (37°N) in the winter and summer solstices and in the spring and autumn equinoxes. Sun trajectory Noon Sunset O S N Sun trajectory Noon Sunrise O Sunset E Spring and autumn equinoxes Sun trajectory S N Sunrise Noon O Sunset S N E E Summer solstice Sunrise Fig. 10. Apparent trajectory of the Sun with respect to the horizontal plane in mid-latitudes of the northern hemisphere, in the winter solstice (top left), in the spring and autumn equinoxes (centre right) and the summer solstice (bottom left) (adapted from Fuentes, 1999).

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