The nutritive peculiarities of crops, fertilizer and soils are described. Meanwhile the nutrient balances of farmland in several typical areas of China are also estimated.
对农作物、化肥和我国土壤营养特性作了简要描述，并对全国和几个典型地区的农田养分平衡作了估算。
The paper discusses the effect of Cu pollution in various soils on the yield of rice. The viewpoint about the critical value of Cu pollution in farmland and decreasing rice yield is described.
该文探讨了各类土壤中铜污染对水稻产量的影响，并就农田中铜污染浓度与水稻减产的临界值作了阐述。
This study determined infiltration into soils on black farmland under different tillage systems by long-term experiment.
通过田间长期定位试验，探讨了耕作措施对农田黑土耕层水分的影响。
This paper summarizes the measuring parameters of the soils in both the soil bin and the field, by use of the self designed HTY-3 type soil parameter metering device for dry farmland.
本文简述了利用自行设计的HTY - 3型旱田土壤参数测定仪对土槽土壤和田间土壤进行的测定。
This paper summarizes the measuring parameters of the soils in both the soil bin and the field, by use of the self designed HTY-3 type soil parameter metering device for dry farmland.
本文简述了利用自行设计的HTY - 3型旱田土壤参数测定仪对土槽土壤和田间土壤进行的测定。
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