农业土壤的

Wind erosion is one of the main causes of land degradation in the arid and semiarid region of China,it limits the development of agriculture at present.

土壤风蚀是我国干旱半干旱地区土地退化的主要原因之一，严重制约着农业的可持续发展。

The soil salination is a significant abiotic stress for agricultural production and ecological environment.

土壤盐渍化是影响农业生产和生态环境的一个非常重要的非生物胁迫因素。

New Zealand Ministry of agriculture and fisheries, agricultural quarantine of imported products do not use the following packaging materials: soil, mud, hay, straw, wheat straw, rice husk or furoic, Carex matter, spent his old sacks and as largestimports wastefrom, and so on.

新西兰农渔部农业检疫所规定，进口商品包装严禁使用以下材料：土壤、泥灰、干草、稻草、麦草、谷壳或糠、生苔物、用过的旧麻袋和其也废料等作为进口商品的包装。

Between the lines in the Eucalyptus Tephrosia vogelii Interplanting both eucalyptus overcome the problem caused by soil degradation, but also to provide green manure for the agricultural production of raw materials and bio-pesticides.

在桉树行间套种非洲山毛豆，既克服了桉树导致的土壤退化问题，又可为农业生产提供绿肥和生物农药的原料。

Saline soil is a very important nonbiological force factor influence agricultural production and ecological environment.

土壤盐渍化是一个世界性问题，是影响农业生产和生态环境的一个非常重要的非生物胁迫因素。

In Zhejiang,the moun- tain and hill areas make up 70.4% of its total area. Owing to the effect of both physiographical factors(rock character, landform,soil,vegetation and rainfall,etc.)and anthropogenic factors deforestation,land reclamation on steep slops and irrational use of Land resource,etc.

由于自然条件和人为因素的影响，土壤侵蚀严重，致使土地退化，河床、水库淤高，生态环境恶化，水旱灾害加剧，成为浙江省农业生产和国民经济发展的一大制约因素。

Therefore, the reduction of the water level in this irrigation district is an important measure to control the soil salinification and it is a key to realize the agricultural sustainable development.

因此，有效降低该灌区地下水位是控制土壤盐化的重要措施，是实现农业可持续发展的关键所在。

Soil and water salinity and salinity management in irrigated agriculture.

土壤和水中的盐分和农业灌溉中的盐分管理

The greatest sources of soil degradation were overgrazing, unsuitable agricultural practices, and deforestation.

土壤衰退的最大原因是过度放牧、不适当的农业施作、和森林滥垦。

According to the Organic Trade Association, organic production is based on a system of farming that maintains and replenishes soil fertility without the use of toxic and persistent pesticides and fertilizers.

根据有机贸易协会，有机生产中基于农业耕作维护和补给的土壤，没有有毒物质和持续农药化肥的使用。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。