1Michael Tracy.Capital-Output Ratios in Agricul ture and Problems in their Use[J] .Zeitsehrift fiir National Skonomie,1970,30:197-208.
2Vogt,Willie.Rising land values mean new skills needed to succeed[N] .Southeast Farm Press,7/17/2013,40(18):22.
3Shahbaz Muhammad,Shabbir Muhammad Shahbaz,Butt Muhammad Sabihuddin.Effect of financial development on agricultural growth in Pakistan[J] .International Journal of Social Economics,2013,40(8):707-728.
4Rozelle,Scott,J.Edward Taylor and Alan de Brau w.Migration Remittances and Agriculture Productivity in China[J] .The American Economic Review,1999,89(2):287-291.
5Krugman,P.The myth of Asia’s miracle[J] .Foreign Affairs,1994,73:62-78.
6X.M.Gao,Anderson Reynolds.A structural equation approach to measuring technological change:An application to Southeastern U.S.Agriculture[J] .Journal of Productivity Analysis,1994,5(2):123-139.
