邊際土壤 的英文怎麼說
中文拼音 [biānjìtǔrǎng]
邊際土壤
英文
border soil-
But the amendment of soil properties depending on the economy and technology are still facing the restriction of boundary effects
但是依靠經濟和技術改善土壤性能，仍面臨著邊際效益的制約。Its marginal efficiency in economy and environment is significant, since it makes full use of temporal and spatial variabilities of crops, soils, insect pest and disease to farming practices and field management
由於精確農業充分地利用了作物、土壤和病蟲害的空間和時間變化量來進行耕作和田間管理，因而，取得的經濟和環境邊際效益非常顯著。Some area such as darning, handan city, yongnian and shexian is marginally suitable, suff value is between 0. 4 and 0. 8. unsuitable areas mainly distributes on hills, mountains and valleys, suff value is between 0. 2 and 0. 4. moreover, for sheixan, handan city and darning, soil water condition during maize growth period was studied by crop model ps 123, the results show : soil water condition in handan city is sufficient for the whole maize growth period ; in shexian, soil water is not sufficient for the whole maize growth period except heavy loam soil ; in damiag, soil water is not sufficient for maize growth since silking stage
結果表明，邯鄲19 . 7的土地面積由於具有潛在侵蝕危險而不適宜耕作， 2 . 5的土地面積由於土壤水分條件太差而不適宜耕作， 9 . 5的土地面積由於水分條件或養分條件不太理想而邊際適宜農業開墾， 68 . 3的土地面積適宜和非常適宜農業耕作，其中適宜農業開墾的地區已經全部種植作物而且在丘陵和山區許多不適宜開墾的地區也被開發利用，表明邯鄲地區已沒有可在開墾的后備土地。Yang and xie 9 developed a numeri - cal model for the moving boundary problem through reducing it to a fixed boundary problem by a coordi - nate transformation. it is necessary to reduce the a subsurface runoff parameterization with water storage and recharge based on the boussinesq - storage equation 623 computational cost of the groundwater model so that it can be applied to a land surface model for climate studies
文獻9通過一個坐標變換將運動邊界問題轉化為一個固定邊界問題，進一步改進了該土壤水模型的數值計算方法，使其減少計算量，達到能在一般通用的模式中實際應用Since most fertile lands have been cultivated, the expansion of the agricultural land has been extended to marginal and problem soils with poor nutrient supply
因為大多數肥力較高的土壤都在進行種植，所以增加農業耕地面積只有向邊際地區和土壤養分含量低並存在某些問題的土壤上擴展。分享友人