The salts leached through the SSD system during the monsoon season was larger than the salt input to the soil through irrigation.

雨季通过地下排水系统淋洗排出的盐分数量大于灌溉季节引入的盐分数量。

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At first, through analyse the influence on the soil, crops, groundwater and function of water body of sewage, the index system of sewage irrigation security appraisal have been set up.

首先，通过污水对土壤、农作物、地下水以及水体功能的影响分析，建立了污水灌溉安全性评价的指标体系。

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Adopting appropriate irrigation system and soil management practices, the return water with low degree of mineralization can be reused.

采用混灌轮灌和良好的土壤改良管理措施，回归水可开发利用。

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After the Shafers hauled their soil back uphill, the first irrigation system they installed exploded.

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Their modular hydroponic system -- where plants sit in a soil-free set up with nutrients delivered through irrigation channels -- can be retrofitted to just about any wall.

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