Cropland surface soil invertebrate living in it is considered as a special ecosystem in cropland - soil system.

农田表土层及其生活在其中的土壤动物被认为是农田土壤生态系统中一类特殊的生态系统.

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Summarized red soil system of system of integrated development management forms upland division reach its value.

简述了红壤丘陵区综合开发经营治理体制系统构成及其重要性.

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