【導(dǎo)讀】increasericeharvestswithoutexpandingtheareaofthefields.In1950,Chinesefarmerscouldproduceonlyfiftymiliontonsofrice.Inarecentharvest,however,nearlytwohundredmilliontonsofricewasproduced.Theseincreasedharvestsmeanthat22%ofthwartworld’speoplearefedfromjust7%ofthefarmlandinChina.DrYuanisnowcirculatinghisknowledgeinIndia,Vietnamandmanyotherlessdevelopedcountriestoincreasetheirriceharvests.Thankstohisres