通过野外采样和室内测定，研究了湖南省主要类型土壤反射光谱的剖面变化特性。

We studied reflecting spectral change characteristics in the depth profile of major soils in Hunan province through field sampling and lab analysis.

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通过分析得出，施行保护性耕作后不会引起土壤板结等问题，而且能够不同程度的降低土壤容重，改善土壤的结构特性。

Through analyzing, conservation tillage did not cause the soil to harden etc, and can reduce the soil bulk density in various degree, improved the structure characteristic of the soil.

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通过大田玉米试验，验证新型土壤改良剂对夏玉米生育期土壤水分、紧实度及玉米生理生长特性的影响。

The article is validate the influence on moisture characteristic, soil compactness, biological and vegetal characteristic of summer maize by new soil amendment use field experimentation of corn.

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