石灰用量对水稻油菜轮作区土壤酸度、土壤养分及作物生长的影响
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Effects of Lime Content on Soil Acidity, Soil Nutrients and Crop Growth in Rice-Rape Rotation System
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图3. 土壤pH与土壤交换性钙镁含量的关系 |
Fig. 3. Relationship between soil pH and exchangeable Ca2+ and Mg2+ content |
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