However, Federal regulations and the cost of conversion have become barriers for small-scale producers.

然而欧美黄色高清视频在线观看，聯(lián)邦政府的管制以及轉(zhuǎn)換成本較高已成為制約小規(guī)模生產(chǎn)者們從事有機(jī)耕作的障礙日韩精品欧美国产精品亚。

The soil and water losses are very light and its difference is not notable in woodland of different tillage mode of economic forest, relatively the soil and water losses is lighter hi protecting slope model than in clearing model in low crown density benching economic forest such as Chinese chestnut, but the soil and water losses is lighter in clearing model than in protecting slope in high crown density benching economic forest such as bayberry.

不同耕作模式成年經(jīng)濟(jì)林地水土流失情況都較輕微日韩播放自拍视频下载网站大全免费，差異性不顯著天天视频黄色片。相對而言郁閉度小的經(jīng)濟(jì)林如板栗林地臺地護(hù)梯方式要比臺地清耕方式好毛片A片一级视频免费看，郁閉度大的經(jīng)濟(jì)林如楊梅林地臺地清耕方式要比臺地護(hù)梯方式好最新日本三级片。

Cusp-shaped trenching is China Agricultural University in the course of the study of conservation tillage in the introduction of screening test the Australian soil, and it has buried a strong ability to form a narrow groove (small amount of ground-breaking), ability to automatically back to earth, simple structure, reliable, low cost and so on.

尖角形開溝器是中國農(nóng)業(yè)大學(xué)在保護(hù)性耕作研究過程中引進(jìn)、試驗(yàn)篩選的澳大利亞開溝器在线看黄官网，它具有入土能力強(qiáng)福利一区视频，溝形窄，自動回土能力強(qiáng)欧美一级A片视频在线播放、結(jié)構(gòu)簡單免费观看的午夜成年网站、工作可靠，價格低廉等特點(diǎn)午夜国产性爱影视在线超黄超污A片。

"In general, crop ping systems should include deep-rooting legumes."

廣義地說亚洲日韩在线综合一区视频，耕作制度應(yīng)圍繞著深根性豆科植物的利用來設(shè)計。

"In general , cropping systems should include deep-rooting legumes."

廣義地說欧美性爱一级免费，耕作制度應(yīng)圍繞著深根性豆科植物的利用來設(shè)計日韩老司机深夜无码影院视频。

On the basis of sampling and chemical examination of soil reclaimed by hydraulic dredge pump that have been cultivated for different time, the paper analyzes their physicochemical property systemically.

本文通過對不同耕作時間泥漿泵復(fù)墾土地土壤的取樣化驗(yàn)，系統(tǒng)地分析了泥漿泵復(fù)墾土地土壤的理化特性色就是色欧美黄片，并對其隨時間的變異性亦進(jìn)行為探討永久黄网色视频免费观看。

There are also considerations to be made in respect of the potential physical consequences of a pole shift (including the aftermaths of potential climate change, flooding, reduced sunlight and volcanic ash which would devastate farming efforts for at least several years).

也得考慮極移可能造成的物理性后果，（包括事后可能發(fā)生的氣候變化自拍偷国产三级片2020，洪水日韩高清性爱网站，陽光減少，火山灰日韩欧美中文字幕二区不卡，這些至少在幾年內(nèi)會毀壞耕作的努力免费看日黄片。

For auld lang syne.For auld, etc.We twa hae run about the braes,And pou'd the gowans fine;But we've wander'd mony a weary fit

彭斯出身佃農(nóng)之家，從小在田間耕作国产精品一区馆在线，因此被稱為「農(nóng)夫詩人」黄色网站免费x。

The farmers also plough up the field with cattle, level it up ,then plant some eeg-plants,broccolis,radishes and so on...To keep it warm enough for plants growing well ,the field must be covered with mulching film.

還是原始耕作方式，牲口犁地美女乱肏屄视频，然后平地在线观看欧美一级片，種上菜花，茄子天天透天天狠狠狠的，蘿卜之類国产精品不卡无码AV在线播放，引水澆灌，因?yàn)闅夂蜿幚溲侵菀患短鼗破夥咽悠翟谙撸圆シN完后需蓋地膜來保溫助長亚洲自偷自偷图片在线。

Although a lot of economic activities are not contributed by weather directly, but the result or course are affected either positively or negatively. For instance, beverage retailer adjusts circulation according to temperature, farmer adjusts way of cultivation according to rural weather report, and umbrella chapmen decide whether to sell or not.

許多經(jīng)濟(jì)活動雖不是直接由天氣促成国产公开免费视频，但其結(jié)果或進(jìn)行過程中是受到天氣正面或負(fù)面影響的，不管是飲料商根據(jù)氣溫調(diào)整販?zhǔn)哿烤镁面面梦逶伦酆掀肪⑥r(nóng)夫根據(jù)農(nóng)業(yè)氣象調(diào)整耕作方式免费性爱黄色视频、雨傘小販依據(jù)大雨特報決定擺攤與否等，皆顯示出天氣已影響人類經(jīng)濟(jì)活動至深日本又硬又爽又黄又粗的视频。