轻盐渍化土的含盐量为（）。0.2-0.5%0.5-0.7%0.7-1.0%＞1.0%

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国家开放大学 / 灌溉排水新技术

轻盐渍化土的含盐量为（）。
0.2-0.5%
0.5-0.7%
0.7-1.0%
＞1.0%

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灌溉排水新技术

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