The major observation items are the effect of the belt to the small range climate of the farmland, drainage and soil improving functions of the belt.
主要观测护田林带对农田小气候的影响、林带的排水作用以及改土效果。
Applying sludge had positive effect on improving the quality of peanut, keeping and improving soil fertility.
污泥对改善花生品质，保持和提高土壤肥力具有作用。
The improving effect of shallow ploughing and deep digging to low-wet soil was studied in this paper.
本文通过大区对比法对浅翻深松改良低湿耕地的效果进行研究。
The effect of Melilotus officinalia on improving degraded soil is studied according to the change in nutrient content of soil after planting.
通过对人工种植黄花草木樨样地的监测，根据土壤养分含量的变化研究了改良退化土壤的效果。
The effect of Melilotus officinalia on improving degraded soil is studied according to the change in nutrient content of soil after planting.
通过对人工种植黄花草木樨样地的监测，根据土壤养分含量的变化研究了改良退化土壤的效果。
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