我国褐土耕地质量的演变及对生产力的影响
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Quality Change of Cinnamon Soil Cultivated Land and Its Effect on Soil Productivity
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图4. 褐土区长期施肥下小麦、玉米的产量变化 |
Fig. 4. Yield change of wheat and corn under long-term fertilizer application in cinnamon soil area |
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