Instead of the buffalo, passenger pigeon and tall grass prairie, the central United States saw desertification and dust storms, especially in the 1920s, a heavy and enduring price to pay for our overly enthusiastic grazing and farming practices.

水牛、候鴿和高草草原從美國中部消失之后唐人呦一呦二在线播放，取而代之的是荒漠和沙塵暴欧洲特级黄色网站。情況在二十世紀二十年代尤為嚴重欧美性交短视频。這不能不說是我們過度放牧和耕作所付出的一個沉重而長期的代價免费无遮挡无码永久视频在线观看。

However, differences exist, and the industrial hemp plant's uniqueness (a tall, very strong fibre and oil seed plant) from any other crops grown in the North American agriculture cropping system requires different agricultural management practices for its successful production.

但是好大好硬好深好爽舒服，存在分歧，而工業(yè)大麻植物的特殊性(一高大很強種子植物纖維和石油)其他作物北美農(nóng)業(yè)耕作制度要求不同農(nóng)業(yè)生產(chǎn)管理方面的成功做法。

For many purposes all these persons, the miller and baker inclusive, must be placed in the same class with ploughmen and reapers.

為了許多目的一级A片全部免费看视频，所有這些人欧州AA黄片免费观看，包括磨坊主和面包師傅在內(nèi)，應(yīng)歸類于耕作者和收割者之列人人婷国产亚洲精品。

The key to that is the research and design of no-tillage planters.

機械化保護性耕作技術(shù)應(yīng)用和推廣的關(guān)鍵是免耕播種機的研制欧美性爱免费官网。

While various operators are carrying out the adjustment of agricultural structure and development of competitive characteristic industry, their cultivation of crops, poultry and cattle rearing, aquiculture and facilities for agricultural scientific experiment shall be taken as the purpose for agriculture with the prerequisite of not violating relevant laws and regulations and policies and not destroying the condition for land cultivation.

各類規(guī)模經(jīng)營主體在進行農(nóng)業(yè)結(jié)構(gòu)調(diào)整、發(fā)展優(yōu)勢特色產(chǎn)業(yè)時国产一级最新视频在线，在不違背有關(guān)法律法規(guī)和政策規(guī)定嘿咻欧美、不破壞土地耕作條件的前提下，其農(nóng)作物種植亚洲一区精品无码黄、畜禽飼養(yǎng)、水產(chǎn)養(yǎng)殖农村片人人操、農(nóng)業(yè)科學(xué)實驗設(shè)施等視為農(nóng)業(yè)用途91在线欧美超碰。

According to the characteristics of 〓 deposition in uncultivated steppe soil profile, the paper presented a revised 〓 model, namely〓, to more reasonably estimate soil wind erosion rates.

本文根據(jù)非耕作的草原土壤剖面中〓Cs分布特征，提出了應(yīng)用〓Cs計算土壤風(fēng)蝕率的修正模型亚洲色拍一区二区三区，即〓欧美激情在线播放一区二区三区。

Instead, they farmed in the lands that owned by the monasteries and the noblemen.

他們在寺廟和貴族的土地上耕作。

From the pharaohs sleeping in the Eygpt pyramid to the farmers cultivating in the Chinese land, from the luxury nobilities to the insipid monks, from the honorable chieftains to the normal pedestrians, the emotion and sorrow on every face keeps on touching us.

從金字塔墓穴里的法老到中國田間耕作的農(nóng)夫免费人成在线观看网站视频，從驕奢的王公貴族到不食人間煙火的僧侶国产一级黄色v片，從高貴的部落酋長到世俗的市井平民，每一張面孔所呈現(xiàn)的世態(tài)冷暖都打動著我們爱爱大学网站免费观看。

The balance couldn't arrive yet at year of 2040 in soil of no-tillage and ridge culture while it will come at low value in the year of 2010 in soil of conventional tillage and soil of no-tillage and fallow in winter.

壟作免耕處理在預(yù)測的50年內(nèi)（2040年）有機質(zhì)積累未達到平衡操烂骚屁眼视频；常規(guī)耕作和冬水免耕最先在較低水平上到達平衡。

For example, the micro biomasses are higher and change fiercely in the ridge or furrow soil of the no-tillage and ridge culture treatment while keep lower and change less during the measured year in soil of conventional tillage treatment and no-tillage and fallow in winter treatment.

如壟作免耕的微生物生物量數(shù)值無論在下層或上層土壤中均較高性交真人运动免费黄色片子。常規(guī)耕作国内自拍91、冬水免耕處理全年的微生物生物量量及變幅均較小。