Soil column method was used to study the characteristics of the movement, transformation, and leach of urea-N in soil added by different ways of the fertigation.

采用室内土柱模拟试验方法，研究了不同灌溉施肥方式下尿素态氮在土壤中的迁移、淋溶和转化特征。

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Based on experiments, we analyzed and discussed the principles of Urea-N transformation and transport under drip-irrigation in the greenhouse.

在试验的基础上，分析讨论了温室滴灌条件下尿素氮运移分布和转化规律。

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By the method of linear transformation, the solution forms of vector wave equation in spherical coordinates, l, m and n, are transformed to the many other kinds of forms.

利用线性变换的方法，将球坐标下矢量波动方程解的形式l、M和N变换为其他多种形式。

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