紫色土坡耕地耕层质量障碍特征
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Quality Barrier Characteristics of Cultivated Layer for Sloping Farmland in Purple Hilly Region
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图3. 不同地力等级坡耕地土壤质量指数变化特征 |
Fig. 3. Variation characteristics of soil quality index of sloping farmland with different productivity grades of cultivated land |
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