指定了两种仅适用于干肥料的方法:机器敲击法和手动敲击法。其原理是将肥料从指定的漏斗倒入指定的已知体积的量筒中，用攻丝机或手动敲打量筒壁，并称量量筒中的内容物。如果肥料在运输或储存过程中吸收了水分，有必要在环境室内干燥。

Specifies two methods for dry fertilizers only: the machine-tapping method and the hand-tapping method. Its principle is pouring the fertilizer from a specified funnel into a specified measuring cylinder of known volume, tapping the cylinder by means of a tapping machine or the walls of the cylinder by hand, and weighing the contents of the cylinder. If the fertilizer has absorbed moisture during transport or storage, it is necessary to dry it in an environmental chamber.