The ruleof salinity accumulating, ion constitution and pH in calcareous soil area greenhouse are opened out.
揭示了石灰性土壤地区温室土壤盐分积累、离子组成及酸碱度变化规律。
2
The constitutionof teaching plan should accord with the rule of teaching and the aim of training, with a view to factors such as the condition of students, the requirements of a society.