The many years experiments in slope farmland show that effects tendency of fertilizer is as follows

MNPMNNPMPNCK

the effects of applying mixed fertilizer is superion to applying single fertilizer

and the effect of applying organic matter mixed with NP is the best

the mutual effects among N

P and M are most powerful

the value of it reached 669 kg/hm2

the crop yield keeps consistent with the nutrient absorbed.Soil organic matter has no obvious change and total N content is decreased as applying single fertilizer

soil organic matter and total N content is increased as applying organic matter mixed with fertilizer.Soil valid N content is decreased as a long-term applying fertilier

but applying organic matter may alleviated this decreasing tendency.Applying P may enhance the soil valid P obviously