The rotary cultivator can realize deep cultivation of soil under the action of the deep plough blade group and realize shallow crushing of soil under the action of the clod crushing blade group.

本发明在深耕犁刀片组的作用下能够实现土壤的深耕，在碎土刀片组的作用下实现土壤的浅碎。

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Over-exploited water resources, deforestation and inappropriate cultivation of grasslands have dried up lakes and eroded soil.

水资源被过度取用，森林被过度砍伐，大草原被不当地耕作，已经造成湖泊干枯、水土流失。

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Using traditional techniques such as crop rotation, compost and manure to supply the soil with nitrogen and other minerals would have required a tripling of the area under cultivation.

如果采用传统技术如轮作和堆肥为土壤补充氮和其他物质，就需要耕地也增长三倍了。

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Knapp gave him a list of simple innovations to follow things like deeper plowing and better soil preparation, the use of only the best seed, the liberal application of fertilizer, and more thorough cultivation to remove weeds and aerate the soil around the plants.

NEWYORKER: Testing, Testing

More people means more forest cleared for shifting cultivation, and bigger herds of goats and cattle browsing the vegetation and compacting the soil.

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