The law of cassava nutrition and fertilizer utilization rate by the cassava field experiments were studied.
通过木薯田间试验，研究了木薯营养规律及肥料利用率。
2
Based on the balance equation of soil nutrient and the law of the minimum limiting factor, some general principles are proposed for making fertilizer application tactics.
由土壤养分平衡方程和最小限制因子定律，讨论了因时因地制定施肥策略的必要性。
3
The law making to the cadmium limitation in chemical fertilizer is still hindered by some parts of relative interests though the greater and greater attention is paid.