The soil nutrient radiated from the loess hills,Oreduos platform sand blown by thestand region to the inner ring,from low to high in the loess plateau region;but be short of N,P inthe loess plateau region,potassium fertilizer has remarkable effect of increase production and raisedquality of plant in some region and some soils,also be short of microelement in some soils.Carry outuse of two and many element complex fertilizer on the fertilizer in the future.
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