They urged "a rapid shift, whenever and wherever conditions permit it, to management systems based on minimal soil disturbance, increased soil cover, and appropriate crop rotation".

他們敦促欧美日韩国产精品，"無論何時(shí)何地黄页网站免费视频福利区，只要條件許可6080午夜影院三级片，應(yīng)迅速向以最低限度干擾土壤日韩黄页无码精品视频，增加土壤覆被和適當(dāng)?shù)淖魑镙喿鳛榛A(chǔ)的管理系統(tǒng)轉(zhuǎn)變"。

So karst vegetation is charactered by Petrophile, Xerophile and Calciphihe in those areas where soil cover is very thin, and the underground drainage system is well developed. The running of karst ecosystem is controlled by two subsystems, which are karst dynamic system in inorganic life and genetic information transmitting system in organic life.

巖溶生態(tài)系統(tǒng)的運(yùn)行受到兩個(gè)子系統(tǒng)的聯(lián)合作用驅(qū)動(dòng)日本黄a网站，即無機(jī)方面的"巖溶動(dòng)力系統(tǒng)"和生命方面的"遺傳信息傳遞系統(tǒng)"18禁止网站。，但主要受以碳、水人人操操操操操操、鈣循環(huán)為中心的巖溶動(dòng)力系統(tǒng)的控制精品国产无码在线观看。

Contaminants can easily enter the subsurface through thin soil cover in stone forest and via swallow holes at the bottom of depression.

究其原因，盡管藥池壩洼地底部土壤層覆蓋較厚黄色操逼免费网站，但存在地表徑流集中排向落水洞国产内射xx在线，生態(tài)石林分布區(qū)地表裂隙、溶溝發(fā)育亚洲图片家庭乱伦，可直接接受雨水入滲美女黄色乱轮视频，因而污染物極易通過降雨和地表徑流過程進(jìn)入含水層。

cover crop：覆蓋作物

soil improving crop 養(yǎng)地作物 | cover crop 覆蓋作物 | food crop 食用作物

cover crop：被護(hù)作物

珊瑚石灰?guī)r土 Coral limestone soil | 被護(hù)作物 Cover crop | 臨界百分率 Critical percentage

Rocks：(以土欧美三级视频观看、石、樹葉等)覆蓋

The dog had buried its bone in the garden. 狗... | to cover somebody/something with soil, rocks, leaves, etc. (以土女性视频网站,色、石日韩午夜福利版在线播放观看、樹葉等)覆蓋 often passive | The house was buried under ten feet of snow. 房子被埋在...