Study on the effect, absorption and distribution of NPK on tomato in greenhouse of Beijing suburbs Study on the  effects of N, P, K fertilizer in Sesame Effects of Different NPK Fertilizer Rates on the Ion Absorption and Distribution of Reed Canarygrass(Phalaris arundinacea) Under Salt Stress Effect of fertilization on the grass yield, water utilizing and nutrition
uptake of Sudangrass and Ryegrass rotation regime
 Effects of N, P and K Fertilizers on yield and fertilizer efficiency of oil sunflower