sod layer

A surface layer of earth containing a dense growth of grass and its matted roots; sod.

草皮,草根土:地面最上层的土层,包括厚密的草和垫子一样的根; 草地.

A piece cut from a layer of earth or sod.

草皮块从一层土或草皮上切下的一块.

The SOD activity of D.involucrata leaves as affected by both biological and non-biological factors, and varied with age class, leaf position and leaf layer.

即珙桐叶SOD活性受生物和非生物因子共同影响，且不同年龄级、叶位、层次均存在差异。

Effects on Zn level and SOD on Layer

微量元素锌和超氧化物歧化酶对产蛋鸡影响的研究

Sod culture controlled the soil water content in the 30 cm depth layer, and kept soil moisture in clear day or after rainfall.

生草可调节土壤上层30cm以内的水分，在雨天有蓄水作用，在晴天有保墒效果。