Based on the summarize of abundance of our country's and foreign literatures, this paper mainly researches on the experiments and theory analysis of soil water movement with mulch and seeding technologies.

因此日韩欧美精，隨著秸稈覆蓋技術(shù)的應(yīng)用，急需研究其蓄水保墑的機(jī)理黄又色又爽很刺激的网站，以指導(dǎo)機(jī)械化保護(hù)性耕作的實(shí)施免费人成又黄又爽的黄视频。

Palestinians inhabit the caves farming and herding sheep in the rocky hills

居住在洞穴里的巴勒斯坦人在多石的山上以耕作放羊?yàn)樯?/p>

The contribution of SOC content under the different crop is as follow from high to low in turn: cole plot, legume plot, general corn plot, corn plot of making seed, wheat plot.

隨著耕作時(shí)間的增加，是剖面上土壤有機(jī)碳含量增加的過程免费无码AⅤ片在线观看网站，呈現(xiàn)老地＞新地＞荒地jiujiure综合网；不同作物類型下土壤有機(jī)碳含量由高到低依次為：油菜地＞豆類作物地＞一般玉米地＞制種玉米地＞小麥地国产黄色网站在线免费、棉花地、大麥地丁香婷婷在线。

It was same that three indexes of activity intensities trended in four types of habitats. The activity intensities of root vole on four types of habitats were in ascending order of the manual cultivated land, true meadow, swamp meadow and D. fruticosa shrub. Three indexes of activity intensities were different significantly between each two types of habitats, except the runway length and runway branch number between the true meadow and swamp meadow.

除了跑道長度和跑道分叉數(shù)在真草甸和沼澤化草甸間差異不顯著外97资源人人操，3活動(dòng)強(qiáng)度變量在不同類型棲息地間均差異顯著，而且變化趨勢(shì)一致日韩性交免费毛片；根田鼠對(duì)4類棲息地的利用強(qiáng)度從大到小依次為金露梅灌叢欧美性爱天天干、沼澤化草甸、真草甸亚洲不在线观看、人工耕作地99久久无码。

The rice acreage in northern rice-planting regions,especially in northeastern regions of China,grows steadily year by year,and the occurrence of and damage by rice insect pests have gradually increased with global warming and changes in cropping systems.

北方稻區(qū)，特別是東北早熟單季稻稻區(qū)女人被男人做到高潮视频，水稻種植面積逐年擴(kuò)大天天爽天天透天天片a久久网，隨著全球氣候變暖和耕作栽培制度等因素的變化，其水稻害蟲發(fā)生面積和危害程度逐漸增大欧美性情A片，對(duì)北方優(yōu)質(zhì)水稻生產(chǎn)構(gòu)成了較大影響日韩精品久久久精品小草。

The slaves were put to work in the plantations where sugar and tobacco were the main crops and the demand for slave labor was great.

大量奴隸被從非洲送往以蔗糖和煙草為主要作物的種植園里耕作，這些地方對(duì)奴工的需求量非常大三级韩国网站。

And the "Columbian exchange" of foodstuffs between the Old and New Worlds was second in importance in food history only to the adoption of agriculture.

新舊世界間食物的&哥倫布交換&在食品史上的重要性僅次于農(nóng)業(yè)耕作欧美日页。

The hunting, fishing and crade farmong of the Norsemen were, in time, unable to support their rapidly expanding population

古代北歐人的狩獵、捕魚和簡甲的耕作無法及時(shí)地滿足人口劇增的需要亚洲色诱99久久66J8。

Squanto was a Wampanoag man who had experience with other settlers and knew English. Squanto helped the settlers grow corn and use fish to fertilize their fields.

斯寬托來自Wampanoag部落免费无码在线观看黄色视频，曾與其它一些定居者打過交道，會(huì)說英語日韩小草在线，他將種植玉米和用魚耕作的經(jīng)驗(yàn)傳授給了那些定居者欧美黄色电影在线看。

This is a rare tree species threatened by slash-and-burn agriculture and poor regeneration from its tiny seeds.

由于砍燒耕作法的農(nóng)業(yè)和它的極小的種子的不良的再生而成為一種稀有的受威脅種木種。