The aim of the field experiment was to investigate to what extent such a system could prevent soil degradation resulting from very intensive croprotations.
此次田间试验的目的，是研究这一方法能在多大程度上防止由于精细的作物轮作所产生的土壤退化。
2
This is an approach to crop production that is based on three principles: permanent soil cover, minimum soil disturbance, and croprotations or crop associations.
保护性农业是一种作物生产手段，它基于三个原则：永久性土被，最低土壤干扰，以及轮作或作物关联。
3
Soil acidification, as influenced by N-fertilizer, stubble management and croprotations, was investigated using soil samples from a long-term rotation trial at Tarlee, South Australia.