 The great challenge for the coming decades will be the task of increasing food production with less water, particularly in countries with limited water and land resources. Conservation of available water resources for agricultural water use is the overall aim of the FAO Water Services in its support to member countries. Crop Water Management is a key area to optimize crop production with limited and dwindling water supplies.
Crops
and Drops: or increasing the production per unit of water
is the overriding aim of this programme. Several introductory
concepts and papers can be consulted on-line.
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Crop
water productivity is the amount of water required per unit of
yield and a vital parameter to assess the performance of irrigated
and rainfed agriculture. Crop water productivity will vary greatly
according to the specific conditions under which the crop is
grown. FAO has initiated a programme to address the issues and
consulted a panel of consultants on procedures to assess crop
water productivity. The programme outline and various papers
can be consulted on line. 
