Nitrogen fertilizers, complex npk fertilizers, florins, fertins, vegetables in human diet, nutrition and fertilization of vegetables, organic fertilizers...
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Fertilization, one of the most important agrotechnical measures, in this century largely depends on the production of organic and mineral fertilizers.
This beautifully illustrated encyclopedia from the pen of a leading name in American horticulture actually contains four books with four hundred plants classified into four categories: annuals, perennials, bulbs, and trees and shrubs.
