This thesis points out three conditions of favorable soil-returning volume,and gets the critical water-content coefficient of bed-irrigating sowing, andthinks that water volume, soil—returning in volume and initial soil water contentcoefficient affects differently the course and the result of infiltration, and revealsthe laws of variations of soil moisture content, and shows the different effect onsoil - wedded states of water volume, depth of seed ditch, soil apparent density,soil-covering depth,initial soil moisture content, width of seed ditch and soil-wedding states, and suggests that the soil-wedding state watering after sevendays is use to evaluate the quality of bed-watering seeding.

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Not suitable for development of agricultural soil: chernozem farming, farming chestnut soil, covering an area of 22.36 hectares.

不宜發(fā)展農(nóng)業(yè)的土壤有：耕種黑鈣土国产a片小黄片、耕種栗鈣土xingaiav11.com，面積22.36萬畝。

S: Soil covering is an important measure in remedial action for uranium tailings impoundment.

在鈾尾礦庫補救行動中污视频免费看网站无码高清在线，庫面上覆蓋土層是其中的一項關(guān)鍵措施无码乱伦一区二区。

covering with other soil for melioration：客土

covering season 繁殖季節(jié) | covering with other soil for melioration 客土 | cow 母牛

Soil sourness：土壤酸性

植物嫌地 Soil sickness | 土壤酸性 Soil sourness | 地被物 Soil-covering

soil cores：土壤鉆孔樣本

soil constitution 土壤構(gòu)造 | soil cores 土壤鉆孔樣本 | soil covering 土被