In the course of working, , the plow will make use of the shuttling method so that it can dig alternately either on the left or on the right. compared to the unilateral plow, it can improve the productivity because it can help leave off the soil 、 take from the consumed energy and reduce the empty journey. to meet the requests above, we will use a remote cylinder with both a small cubage and double functions, approximately designing the plow to be columniform and symmetric. after the experiment for a period in the field, we found that the most frayed areas had happened at the places of both plow shank and share and at the same time the base of the remote cylinder had ruptured suddenly
與單向犁相比,其優點在於:
耕地無開、閉壟,地表平整,降低了
耕后整地的能量消耗,減少了地頭的空行程,因而大大提高班次生產率。為了滿足犁體梭式作業的要求,我們採用了
一隻小容積雙作用的液壓油缸;同時對犁壁曲面的形狀採用了近似圓柱形的對稱設計。但經過
一段時間的田間試驗,我們發現:該犁犁胸部分的犁脛和犁鏵上的犁尖在工作中磨損較為嚴重;主犁梁和油缸缸體的連接部分(即油缸底座)突然發生了斷裂,造成整個犁體無法正常工作。
He would repeat the word "yeomen" as if it afforded him consolation.
他要把自
耕農三個字重復
一下,好象給他安慰似的。
There was a ridge of ploughed land, with a plough upon it where it had been left last night when the horses were unyoked ; beyond, a quiet coppice - wood, in which many leaves of burning red and golden yellow still remained upon the trees
窗外有
一條翻
耕過的地畦,上面有
一部昨夜除去馬軛后留下的鏵犁。遠處是
一片寂靜的雜樹叢,還殘留著許多火紅的和金黃的樹葉。
One authority concluded in 1914 that 40 per cent of the farms in the corn belt were operated by tenants.
一位權威人士1914年斷言:玉米地帶40的農場是由佃農
耕種的。
The most environmentally benign form of agriculture appears to be “ no till ” farming, which involves little or no ploughing and relies on cover crops and carefully applied herbicides to control weeds
最環保的農業生產方式似乎是「免
耕」播種,這
一生產方式很少或不再
耕作,依賴表層植被並謹慎使用除草劑。
In acidic soils, its toxicity is considered to be the most limiting factor for plant productivity. based on an estimate of the world ' s potentially arable land resources, it has been estimated that most of the cultivable area ( 78. 4 % ) is composed of acid soils
全世界有39 . 5億hm ~ 2酸性土壤,其中可
耕土壤面積為1 . 79億hm ~ 2 ,如何解決酸性土壤的鋁害問題已經是不容忽視的
一項重要課題。
The farmer decided to leave the land fallow for a year
農夫決定讓土地休
耕一年。
Because no tillage and minimum tillage reduce erosion and concentrate nutrients in the surface soil just below the residue cover, micronutrients generally are less often deficient than under conventional tillage
由於少
耕和免
耕減少了水土流失,同時把養分富集在植物殘茬覆蓋下的土壤表層,所以,與傳統
耕作制相比,少
耕和免
耕一般不易發生微量元素的缺乏。
Weaving maid and cowboy got married and led a happy life, one farming, the other weaving
牛郎織女結婚了,
一耕一織,生活很幸福。
The nobel prize in chemistry : koichi tanaka
諾貝爾化學獎-田中
耕一
2002 koichi tanaka japan
2002年田中耕一日本