Under conventional till, crop response to spring soil water content was considerably greater than under zero till.
在常规耕作条件下，春季作物对土壤水份含量的响应要比免耕地大得多。
2
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。
3
In summary, under zero till crop response to nitrogen levels in the spring was approximately twice as large compared to conventional till.