10Dr MARTIN E TRENKEL.Controlled-Release and Stabilized Fertilizers in Agriculture[M].Published by international Fertilizer Industry Association,Pairs.December,1997.
9Fan J, Hao M D, Malhi S S. Accumulation of nitrate - N in the soil profile and its implications for the environment under dryland agri- culture in northern China : A review [ J ]. Canadian Journal of Soil Science, 2010, 90(3): 429-440.
10Trenkel M E. Slow - and controlled - release and stabilized fertiliz- ers : an option for enhancing nutrient efficiency in agriculture[ M ]. Second edition. Paris, France: International Fertilizer Industry As- sociation(IFA) , 2010 : 136 - 169.
