The results showed that the main factors deciding yield varied with the difference of ecological zones and soil fertilities.
结果表明，山西省旱地小麦在不同的生态区域、不同的肥力条件下，决定产量的主导因子有所不同。
The respiratory intensity, the activity of several soil enzymes and the soil fertilities were also comparatively determined in the original soil with those in the casts.
比较测定了蚓粪和原土壤几种重要的土壤酶的活性变化以及土壤的几种肥力指标的变化。
The influence of application of organic and nitrogen fertilizer on the content of alkali hydrolysable N in fertilities soil was studied.
对设施土壤中长期施有机肥与氮肥对土壤中碱解氮含量的影响进行了研究。
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