They were engaged in the study of soil conservation.

他們?cè)趶氖?strong>土壤保持的研究超碰在线最新发布免费。

He practiced crop rotation and soil conservation a century before these became standard practice, and he invented a plow superior to any other in existence.

在人人普遍采用農(nóng)作物輪作和土壤保持的作法以前一個(gè)世紀(jì)丝袜国产自在线拍AV，他就這樣做了。他還發(fā)明了一種比當(dāng)時(shí)任何一種都好的耕犁99久久久无码国产精品动漫。

He practiced crop rotation and soil conservation a century before these became standard practice, and he invented a plow superior to any other in existence .

在人們普通采用農(nóng)作物輪作和土壤保持的做法之前一個(gè)世紀(jì)国产精品美女妓女网站，他就這樣做了。他還發(fā)明了一種比當(dāng)時(shí)任何一種都好的耕犁欧美老妇被操。

It also keeps the soil cooler and helps to stop water from evaporating.

同時(shí)它也使土壤保持較低的溫度男人抽插女人免费看黄色网站，從而有助于防止水分蒸發(fā)。

Water seeping from pores of fictile pipe to moist soil and crop root system.

因土層內(nèi)的陶管側(cè)壁有孔美女A级黄色的18禁网站，水由陶管孔滲入土壤保持作物根據(jù)系土層長(zhǎng)期濕潤(rùn)娇喘av。

Stonework aids erosion control and soil retention.

石雕艾滋病防治水土流失和土壤保持。

The sixth part: Studies on the dynamic changes of soil retention function value of ecosystem in YUYANG District. Utilized ERDAS8. 5 to interpret the remote sensing image and get LUCC data and vegetation information of YUYANG District. Utilized R2V5. 5 to digitize administrative map, topographic map, vegetation picture, soil distribution map and meteorological website map. Utilized ARCINFOR8. 3 to change every digitization layer to the same projection, to generate Tyson polygon, to structure DEM and do vector polygon overlay. Utilized ARC VIE W3. 3 to obtain the grid data topographic slope and slope length from DEM data of YUYANG District, and then, turned every coverage layer into grid layer and do grid polygon overlay to gain data about dynamic changes of value of soil retention of ecosystem in YUYANG District, at last, the author analyzed the features of the spatial-temporal changes and its reason.The seventh part: Studies on the dynamic changes of fixing drifting sand against wind function value of ecosystem in YUYANG District.

第六部分：榆陽(yáng)區(qū)生態(tài)系統(tǒng)土壤保持功能價(jià)值動(dòng)態(tài)變化研究国产美女一级A片免费观看9；利用ERDAS8.5對(duì)遙感數(shù)據(jù)進(jìn)行解譯獲得榆陽(yáng)區(qū)土地利用數(shù)據(jù)和植被信息伊人久久大线影院首页，利用R2V5.5數(shù)字化榆陽(yáng)區(qū)政區(qū)圖、地形圖亚洲一区国产高清视频在线观看、植被圖久久国产一区精品免费观看、土壤分布圖及氣象站點(diǎn)分布圖，利用ARCINFOR8.3對(duì)各數(shù)字化圖層進(jìn)行投影轉(zhuǎn)換黄色视频你们懂的、泰森多邊形生成亚洲熟妇AⅤ无码一区二区、DEM構(gòu)建和疊加分析，利用ARCVIEW3.3從DEM數(shù)據(jù)中獲取榆陽(yáng)區(qū)的坡度亚洲强奸视频在线观看、坡長(zhǎng)面域數(shù)據(jù)亚洲97AV一区，并將上述各圖層格網(wǎng)化，然后通過柵格圖層疊加分析和代數(shù)運(yùn)算獲取榆陽(yáng)區(qū)生態(tài)系統(tǒng)土壤保持功能物質(zhì)量和價(jià)值量時(shí)空動(dòng)態(tài)變化數(shù)據(jù)亚洲日韩在线一区二区三区，最后分析了其變化的時(shí)空特點(diǎn)及形成原因91黄色一级视频。

Problems of soil conservation and shoreland development are not likelyto quickly disappear.

土壤保持和濱海地開發(fā)問題也不可能很快消失。

The wood mulch keeps the soil cool and maintains an even soil temperature.

木材和復(fù)蓋可使土壤保持冷靜无码97视频，甚至土壤溫度黄色视频玖玖网站。

The Soil Science and Soil Conservation Institute ,belongs to Agriculture Department of Justus Liebig University,is an educational and sciectific researches arrangement.It has European characteristics on the education-style and the research running mechanism.

吉森李比希大學(xué)土壤和土壤保持研究所是李比希大學(xué)農(nóng)學(xué)系下屬的一個(gè)教學(xué)科研機(jī)構(gòu)，其人員結(jié)構(gòu)国产综合一区二区三区精品、組織管理方式日本片一级、科研運(yùn)行機(jī)制等在歐洲具有普遍性。

Soil conservation：土壤保持

"水土流失"和"水土保持"是我國(guó)原創(chuàng)的水保術(shù)語(yǔ),以前國(guó)外的資料僅有"土壤侵蝕"(soil erosion)和"土壤保持"(soil conservation),現(xiàn)在美國(guó)農(nóng)業(yè)部下屬的水保機(jī)關(guān)仍叫--土壤保持局.

Soil conservation：保土土壤保持

soil colour 土壤顏色 | soil conservation 保土 ; 土壤保持 | soil consistence 土壤結(jié)持度 ; 土壤稠性

soil consistence：土壤結(jié)持度土壤稠性

soil conservation 保土 ; 土壤保持 | soil consistence 土壤結(jié)持度 ; 土壤稠性 | soil creep 土蠕

soil consistence：土壤結(jié)持度

soil conservation extension 土壤保持推廣 | soil consistence 土壤結(jié)持度 | soil consistence constent 土壤結(jié)持常數(shù)

Soil degradation：土壤退化作用

soil conservation 土壤保持 | soil degradation 土壤退化作用 | soil depletion 土壤耗損; 土壤貧化

Soil erosion：土壤侵蝕

"水土流失"和"水土保持"是我國(guó)原創(chuàng)的水保術(shù)語(yǔ),以前國(guó)外的資料僅有"土壤侵蝕"(soil erosion)和"土壤保持"(soil conservation),現(xiàn)在美國(guó)農(nóng)業(yè)部下屬的水保機(jī)關(guān)仍叫--土壤保持局.

Soil capabilities：土壤潛力

沉積 Sedimentation | 土壤潛力 Soil capabilities | 土壤保持 Soil conservation

soil conservation measures：土壤保持措施

soil conservation 土壤保持 | soil conservation measures 土壤保持措施 | soil consistency 土壤結(jié)持度

soil conservation measure：土壤保持措施

soil conservation 土壤保持 | soil conservation measure 土壤保持措施 | soil constituent 土壤成分

soil conservation survey：土壤保持調(diào)查

small-scale survey 小比例尺測(cè)量 | snow survey 測(cè)雪,降雪測(cè)量,積雪調(diào)查 | soil conservation survey 土壤保持調(diào)查