This text passes to plant the farm crop to apply fertilizer the present condition inquisition to the sweet province of Ganshu main agriculture area lord to as a result statistics the analysis, putting forward the sweet province of Ganshu different agriculture area main farm crop nitrogen fertilizer utilization present condition, inquirying into the main reason that factor and the fertilizer utilizations of affect the nitrogen fertilizer utilizations descend, applying fertilizer to provide the theories for science accor
