Water buffalo, worth about $300 each, are used mainly for plowing and milking.

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Yearly changing soil water content of chestnut under different mode of tillage and cultivation shows "single-peak" curves.

從板栗土壤含水量的年變化來看，不同的耕作方式下的土壤含水量其變化規(guī)律基本是"單峰型"。

Compared with conventional fertilizer application pattern , soil infiltration capacity , water-conserving ability , water availability and water use efficiency under hole-source pattern were all increased to different degree . Water distribution on soil profile, especially the soil water distribution in root zone was more reasonable . Therefore , modulating function of soil reservoir could elaborate effectively .

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The change of cultivation methods and weed managements accelerate the growth and spread of weedy rice.

這些耕作方式和管理方式的改變?yōu)殡s草稻的生長和擴散提供了有利的條件可以免费看的AV网站。

Compositive control measurement of weedy rice based on prevention and cultivation should be applied.

應采取預防和耕作栽培措施為主的雜草稻綜合防治措施對雜草稻進行積極的控制精品三级在线视频。

Farming methods will have to be changed if the growing period is going to be longer or shorter or drier or wetter.

耕作方法，就必須改變男女羞羞在线永久免费观看，如果生長期將是或長或短亚洲三级片免费观看视频，或干燥或多雨。

In single and double cropping region, along with dominating crops such as wheat belt, maize belt and soy bean belt and sustainable increasing of consumption demand it is important and feasibility that carried out crop rotation and continuous cropping, moreover, crop rotation decreasing and continues cropping with longer years.

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From wilding domestication to crop breeding, and the invention of traditional dead stock to intensive cultivation, Henan agriculture was always keeping an advanced status in China and all over the world in many fields.

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They instructed the new－comers in their agriculture and woodcraft,introduced them to maize,beans,squash,maple sugar,snowshoes,toboggans,and birch bark canoes.

他們對這些新來的人在農(nóng)業(yè)耕作和森林環(huán)境知識方面加以指導，教他們認識玉蜀黍永久无毒在线观看你懂的、豆子337啪啪肉体、西葫蘆、槭糖AV超碰A∨超碰AV超碰、雪地鞋a毛片在线观看、長雪橇和樺樹皮獨木舟。

Today, they survive precariously in a few patches, having retreated from 95% of their former domain, in the face of relentless human pressures: clearing of land for farming and grazing, woodcutting for fuel and timber, over-hunting of prey, and killing of tigers themselves.

而今天，老虎已經(jīng)從其95%的棲息地上絕跡99精彩视频这里有，僅僅在一些零星的地域茍延殘喘欧美十八性XX性高潮喷，這一切的罪魁禍首正是人類無情的重壓：為了耕作和放牧而清除森林，為了燃料和木材而砍伐樹木人人人人人人操人，過度捕獵老虎的食物欧美精品一区二区黄色视频，甚至直接殺戮老虎。