Agriculture Reference
In-Depth Information
Photo 1.5.
High tunnels.
Photo 1.6.
Plastic film multi-span greenhouse.
quality, extend the harvest period and
expand the areas of production (Wittwer
and Castilla, 1995). In some regions, the
reduction of solar radiation (shading), or
the protection against wind, hail or rain
are also objectives of protected cultiva-
tion. It is also intended to make a more
efficient use of soil, water, energy, nutri-
ents and space, as well as climatic
resources such as solar radiation, temper-
ature, humidity and CO
2
in the air
(Wittwer and Castilla, 1995).
Besides protection of the crops
against drought by irrigation, as outlined
