Classified forest management is the method and increasing the total amount of forest resources and improving multiple benefits is the goal.
森林分类是基础，经营是手段，提高森林的总量和综合效益是目的。
Deflection, the total tendency is under the similar load, along with the web plate high increase, the built-up beam rigidity is increasing, amount of deflection unceasing reducing.
对于挠度来说，总的趋势是在同样的荷载下，随着腹板高度的增加，组合梁的刚度在增加，挠度不断的降低。
Increasing the applying amount of nitrogen and phosphorus could all promoted nitrogen and phosphorus content in plants and total dry matter weight per unit area.
增施氮磷用量，均可提高油菜植株氮、磷含量和单位面积的总干物重。
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