6[12]Poole WD,Randal GW,Ham GE.Foliar fertilization of soybean:I Effect of fertilizer sources,rates,and frequency of application[J].Agronomy Journal,1983,75;195~200.
7[13]Haq MU,Mallarino A.Response of soybean grain oil and protein concentrations to foliar and soil flenilization[J].Agronomy Journal,2005,97:910~918.