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| 81. | ground-working equipment |
| 土壤耕作机具 |
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| 82. | belt of soil moisture |
| 土壤水带 |
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| 83. | soil sampler |
| 土壤采样器 |
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| 84. | a base layer of soil |
| 底层土壤 |
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| 85. | soil chemistry |
| 土壤化学 |
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| 86. | interstices of soil |
| 土壤裂缝 |
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| 87. | soil testing |
| 土壤测试 |
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| 88. | fruitful soil |
| 丰产土壤 |
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| 89. | soil biology |
| 土壤生物学 |
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| 90. | l-balanced soil |
| 不平衡土壤 |
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