In the case of arable soils, where the amount of phosphoric acid determined by this method falls below 01%, phosphatic manuring is essential for good crops.
The exhaustion of the soil induced by both barley and wheat is, however, characteristically that of available nitrogen; and when, under the ordinary conditions of manuring and cropping, artificial manure is still required, nitrogenous manures are, as a rule, necessary for both crops, and, for the sp
manuring与发音含义,同义词,反义词,翻译,刑和更多的