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Crop Yield Response to Deficit Irrigation - Report of an FAO/IAEA Co-ordinated Research Program by Using Nuclear Techniques (Hardcover, 1999 ed.)
Loot Price: R4,318
Discovery Miles 43 180
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Crop Yield Response to Deficit Irrigation - Report of an FAO/IAEA Co-ordinated Research Program by Using Nuclear Techniques (Hardcover, 1999 ed.)
Series: Developments in Plant and Soil Sciences, 84
Expected to ship within 12 - 17 working days
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The increasing global demand for food and other agricultural
products calls for urgent measures to increase water use efficiency
which is, with plant nutrient availability, one of the two main
limiting factors in crop production. Although only 20% of all
cultivated land in the world is under irrigation, it provides
35-40% of all crop production. Because of higher yields under
irrigated agriculture, investments for irrigation are usually a top
priority. However, it has become a matter of serious concern in
recent years that, despite their high co~ts, the performance of
many irrigation projects has fallen short of expectations as a
result of inadequate water management at both farm and system
levels. Crop production increase has been well below the project
targets. The greatest potential for increasing food and other
agricultural products is the more efficient use of naturally
occurring precipitation in conjunction with improved soil fertility
management. Until recently, regardless of the amounts and
distribution of rainfall, irrigation practices were used almost
exclusively to supplement the amount of soil water stored in the
root zone to such an extent that the available soil water never
allowed the crop to suffer from water stress throughout the growing
season. As a result, even today farmers still tend to over-irrigate
to ensure a bountiful amount of water stored.
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