Please note that this is the first of a special four-part series here at Big Picture Agriculture. One post will go up each of the next four days which will list and describe methods for producing “more with less” water use in farming.
A leading concern facing the future of agricultural production is the availability of water. It is expected that climate change will cause more extreme climate events including droughts and floods and shifts in plant growing zones. As populations grow, more efficient use of water in growing food will be of key importance.
Today, some 2.8 billion people live in water-scarce areas, but by 2030, it is expected that about half of the world’s population will live in water stressed areas.
Past overuse of fossil water from aquifers will make it necessary to improve the efficiency of irrigation and rainfed agriculture methods to grow tomorrow’s food. The increasing competition for water in urban areas and for energy uses will lessen what is now available for agriculture, estimated to be 70 to 80 percent of global fresh water use. As other interests gain a share of the fresh water supply, the production of food will need to increase at the same time that the water used to grow it decreases.
Agriculture is done using both rainfed and irrigation farming. About 80 percent of globally cultivated land is done with rainfed farming, accounting for 60 percent of world food production. Using smart methods to enhance efficient and creative water use in rainfed agriculture has the potential to increase production. The majority of the world’s poor and hungry live on rainfed farms in South Asia and sub-Saharan Africa, so techniques which can improve water use in these regions are very valuable. While irrigation levels have declined since the 1970s for various reasons, irrigation has the potential to expand in the future in parts of Africa.
Productivity of irrigated land is more than three times that of unirrigated land. Around 40 percent of the world’s food is produced on the 20 percent of land which is irrigated. The monetary value of the yield of irrigated crops is more than six times that of unirrigated crops because crops with higher market values tend to be grown on irrigated land.
Many of the methods known to conserve water and use it efficiently have been practiced for thousands of years in some very arid regions of the world with great success. The best systems require little maintenance while yielding maximum results. The ability to add water during crucial growth periods can greatly increase crop yields.
To follow, is a list of water saving techniques which will be helpful in growing more food with less water. Because every parcel of land requires its own best unique solution, I hope readers find this post both useful and inspirational. Please feel welcome to add other methods not included on this list, in the comments below.
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(End of Part 1.)
● 35 Water Conservation Methods for Agriculture, Farming, and Gardening. Part 1.
● 35 Water Conservation Methods for Agriculture, Farming, and Gardening. Part 2.
● 35 Water Conservation Methods for Agriculture, Farming, and Gardening. Part 3.
● 35 Water Conservation Methods for Agriculture, Farming, and Gardening. Part 4.