As a result, the method of using airslake-coal to produce potassium fertilizer including humic acid was varied with different crops.

因此，在利用风化煤腐植酸钾肥时，应根据作物类型择工艺路线。

Humic acid is a kind of organic matter with high molecular quantity and satisfactory biological activity, and there are abundant humic acid in airslake-coal.

摘要腐植酸是一种有物活性的有机高分子物质，风化煤中有丰富的腐植酸。