The Nazca wanted land for corn and other crops and did not realise the forests were crucial to soil fertility and moisture, said the Cambridge University-led report.
剑桥大学主导的这个报告表示纳斯卡需要土地来种植玉米和其他作物，而并没有意识到森林对于保持土壤的养分和水分的重要性。
In recent years, the agricultural soil study of the Loess Plateau is mainly focused on long-term fertilization effects on soil moisture, soil fertility, and crop yield.
近年来人们对黄土高原地区农业土壤的研究主要集中在长期施肥对土壤中含水量、土壤肥力、农作物产量等的影响。
The Book pointed out that there existed relation among soil management, preservation of soil moisture and preservation of soil fertility.
书认为土壤管理、保墒和保肥是相互联系的。
The plastic film mulch can increase the soil temperature, and the straw mulch can improve soil fertility. Besides above advantages, the double mulch can also preserve soil moisture.
地膜和秸秆二元覆盖既有地膜覆盖的增温作用及秸秆覆盖的肥田改土作用，又有双重的蓄水保墒效应。
Also improve soil texture, prevent compaction and enhance the ability of preservation moisture and fertility.
长期使用可改善土壤结构，防止土壤板结，增强土壤保水、保肥、保温透气性。
Also improve soil texture, prevent compaction and enhance the ability of preservation moisture and fertility.
长期使用可改善土壤结构，防止土壤板结，增强土壤保水、保肥、保温透气性。
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