It can be as base fertilizer , after fertilizer and foliar fertilizer.可以用做底肥, 也可以用做追肥及叶面肥.Determination micronutrient boron for foliar fertilizer by indirect acid - base titration, overcome the inadequate of others metho...
Agricultural soils are the ultimate recipient and depository of most applied foliar and soil pesticides.喷撒于叶面和用于土壤的农药大多以农业土壤为其最终受体和贮存场所.It can be as base fertilizer , after fertilizer and foliar fertilizer.可以用做底肥, 也可以用做追...
George is a public relations officer for The John Bennett Trust.乔治是约翰·本尼特信托公司的一名公关主管。Limiting casualties is important for public relations.减少伤亡人数对于维护公众形象很重要。The move was good public relations.该举措是有效的公关手段。...
We shall study double integrals over more general sets in the plane.我们将研究定义在平面上更一般的集合中的二重积分.The last two integrals correspond to the natural boundary conditions.最后两个积分对应于自然边界条件.This cuts the labor of evaluating integrals...