研究发现的改善土壤的第五种方法是减少农作物耕作。
And the fifth way that the study found may improve sorghum production is to reduce crop tillage .
这是一种速生的树木和灌木，它的叶子和根系有助于改善土壤。
These are fast-growing trees and shrubs whose leaves and roots help improve soil.
主要结论如下：(1)林粮间作能较好地改善土壤物理和化学性质。
The main conclusions can be drawn as follows: (1) Intercropping could obviously improve soil physical and chemical properties.
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