Commercial fertilizers generally contain nitrogen, phosphorus, and potash in amounts varying with the requirements of the soil. 伯莎M.克拉克.科学通论.
The blood is largely used for making albumen for photographic uses, as well as in sugar refining, for meat extracts, and for fertilizers. Edward W. Byrn.十九世纪发明进展.
Davy recognized and explained the beneficial fertilizing effects of ammonia, and analysed and explained numerous fertilizers, including guano. 威廉·亨利·杜利特.世纪发明.
The other important ingredient of most fertilizers is potash. 伯莎M.克拉克.科学通论.
They knew the value of fertilizers, and adapted their crops to the quality of the ground. 赫伯特·乔治·威尔斯.世界史纲.
Knowledge, these Germans believed, might be a cultivated crop, responsive to fertilizers. 赫伯特·乔治·威尔斯.世界史纲.
Soil and the fertilizers which enrich it, the plants which grow on it, and the animals which feed on these, all contain nitrogen or nitrogenous compounds. 伯莎M.克拉克.科学通论.