Effects of different tillage systems on labile organic matter and carbon management index in purple paddy soil of long term experiment site(since 1990) were studied.

以長期定位試驗點的紫色水稻土為研究對象看A片免费的网址，研究了耕作制度對紫色水稻土活性有機(jī)質(zhì)和碳庫管理指數(shù)的影響免费网禁拗女网站。

Cyclone, local circulation (sea breeze, land breeze, uphill breeze, downhill breeze), violent weather, typhoon, agricultural meteorological disaster, process of microclimate formation on farmland, will be explain chapter by chapter. By means of weather observation is helpful for the learners to apply

本課程先介紹各種氣象要素（如日射偷拍外国呦呦呦、日照黄片毛片a片免费看、溫度免费看所有乱伦黄色视频、氣壓激情黄色网址、風(fēng)、云、霧日韩爆乳教师无码视频、降水日日夜夜摸日日夜夜操、蒸發(fā)等）應(yīng)用於農(nóng)業(yè)生產(chǎn)環(huán)境之測定方法介紹，其次對於大氣主環(huán)流永久免费Av无码网站,国产、次環(huán)流很很操狠狠干很很日、局部環(huán)流（海風(fēng)、陸風(fēng)手机看片,你懂的、山風(fēng)ww黄色一级视频、谷風(fēng)）、劇烈天氣鲁鲁A片特级特色黄色影片、臺風(fēng)精品国产黄色片在线观看、農(nóng)業(yè)氣象災(zāi)害、農(nóng)地微氣候形成過程逐章闡述97精品久久久中文字幕免费，并由天氣變化觀察66j8c，進(jìn)而使習(xí)者將相關(guān)氣象學(xué)相關(guān)知識融入農(nóng)業(yè)耕作及環(huán)境關(guān)懷。

I got out several cords of stumps in plowing, which supplied me with fuel for a long time, and left small circles of virgin mould, easily distinguishable through the summer by the greater luxuriance of the beans there.

鋤地時男女动态视频操，我挖出了許多樹根來国产精品第一夜不卡丝袜，有幾"考德"，供我燃燒了很久欧美中文字幕观看，這就留下了幾小圈未耕作過的沃土，當(dāng)蠶豆在夏天里長得異常茂盛的時候是很容易區(qū)別它們的欧美欧美视频a√在线。

This presents a considerable advantage for waste treatment, such as land farming, used to treat the waste generated after drilling with WBM in the Lake Maracaibo area.

這是一個相當(dāng)大的優(yōu)勢国产午夜激无码AV毛片不卡国，為廢物處理，如耕作等一级少妇A片无，可用于處理廢物生成后看片色色，鉆進(jìn)wbm在馬拉開波湖區(qū)。

We get spammed by them, we run into them farming Dire Maul, we put them on ignore.

我們得到了太多的樱花aⅴ一区二区三区四区，我們遇到了他們耕作兇暴槌一道本在视频线高清无码，我們把它們忽略。

Agroforestry A system of cultivation common in many parts of the tropics, especially in rainforest regions, in which forestry and arable farming are mixed.

農(nóng)業(yè)林學(xué)：在許多熱帶地區(qū)特別是熱帶雨林地區(qū)的一種耕作方式人人干人人操福利，它混合了林業(yè)和種植業(yè)国产一级无码毛片。

In all fertilization treatments, the mean mass diameter of WSAs was larger in 0-10 cm than in 10-20 cm soil layer. Compared with non-fertilization, long-term fertilization increased the MMD of WSAs, and organic manure was superior to chemical fertilizers.

各處理0~10cm土壤水穩(wěn)性團(tuán)聚體平均質(zhì)量直徑均大于10~20cm土層；自然土壤的團(tuán)聚體MMD顯著高于同層次耕作土壤国产av中文字幕，長期施肥處理MMD大于無肥對照亚洲精品自拍视频网，有機(jī)物質(zhì)培肥處理明顯高于化肥處理。

This paper analyses and calculates the plow parameters about two kinds of high speed plows LEMKEN and KUHN, and studys the relation between the geometric parameters of shape of moldboard plow surface and soil properties, plowing quality, forces properties, plowing speed, resistance and energy dissipation during the plowing. Then according to the direction of developing high efficiency and saving-energy agriculture, under the premise of good farming quality this article puts forward a kind of method setting the mathematics model about plow resistance through the new cultivation principle and the new design principle.

本文通過對比分析的手段對LEMKEN和KUHN兩種高速犁參數(shù)兩種犁體曲面參數(shù)進(jìn)行量化分析計算国产免费永久黄色精品，分析犁體曲面形狀的幾何參數(shù)與耕后質(zhì)量一级毛片免费看高清视频在线、土壤的力學(xué)特性、耕速一级毛片免费黄色视频、阻力和功率消耗等相關(guān)關(guān)系插操水视频，結(jié)合目前高效節(jié)能型農(nóng)業(yè)的發(fā)展方向狼友视频-首页，提出在保證作業(yè)質(zhì)量的前提下，應(yīng)用新型耕作理論和新型設(shè)計理論建立牽引阻力數(shù)學(xué)模型www.xx日本黄色视频.com。

While traditional farming experiences and preliminary experiments on minimum tillage showed a preference of alternating furrow slice inverting and deep loosening without inverting in some of the agricultural regions in China, the development of a PTO driven furrow slice inverting rotary plow as primary tillage implement inplace of the conventional moldboard plow was justified from the standpoint of less tractor traffic, less soil compaction, less energy consumption, sowing in time etc.

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"Human activities, such as monocultural farming practices, use of broad-spectrum pesticide s, and introduction of exotic species, often result in the proliferation of pest species."

人類的活動，如：單一的耕作亚洲国产成AV人天堂无码、廣譜農(nóng)藥的使用和外來物種的引進(jìn)都有可能造成有害生物物種的繁殖91视频精彩。