Capitalconstruction on farmland ,which cannot be replaced by othersoiland water conservation measures,is amain measureto controlsoiland waterloss,increase grain yield and developruraleconomy.The Yellow River basinin Gansu Province has a large area of gentle sloped farmland and the existing capitalfarmland is difficultto ensureself sufficientin grain.Conducting capitalfarmland constructionis notonly necessary,butalsofeasible becauselead ers at variouslevelsandfarmers attach greatimportanceto capitalconstruction on farmland and have greatinitiative.In addition,thestateinvestment andlocalcounterpartfundsare guaranteed.Itis estimated based on the basicstan dard of380 kg/person asself sufficientin grain,it willneed 2 .120 7 milliontons ofgraininthe Yellow River basinin Gansu Provincein 2010. According tothe productivity of various kinds ofcapitalfarmlands,theaccumulated de veloped farmlandsin 2010 are asfollows:dam med land 447 270 hm2 ,smallpiece ofirrigatedland 150 000 hm2 and terracedland builtfrom slopedland 1 .819 3 million hm2 .
