The long-term alternate leaching aerobic incubation is the most important method for evaluating soil N supply- ing capacity.Initial mineral N(N_(min)),extractable total soluble N and soluble organic nitrogen(SON),mineral N(MNL= NO_3~--N+NH_4~+-N),total soluble N(TNL=SON+NL)and cumulative SON leached during aerobic incubation,and their correlations with crop N-uptake of 10 types of farmland soils with different physical and chemical properties on the Loess Plateau were investigated.Soil N mineralizable capab...
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