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" Furthermore, the mineral elements are relatively cheap, while the nitrogen is relatively expensive, and the economical use of this expensive element, nitrogen, is dependent to a large degree upon the abundance of the mineral elements in the soil. It is,... "
First Principles of Soil Fertility - Página 225
por Alfred Vivian - 1908 - 265 páginas
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Fertilizers: The Source, Character and Composition of Natural, Home-made and ...

Edward Burnett Voorhees - 1898 - 335 páginas
...the mineral elements are relatively cheap, while the nitrogen is relatively expensive, and thus that the economical use of this expensive element, nitrogen,...the nitrogen be applied in active forms, as nitrate or ammonia, and in such quantities and at MINEItAL SUPPLIES ADVANTAGEOUS 185 such times as will insure...
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Bulletin, Volúmenes48-60

1908
...mineral elements are relatively cheap, while the nitrogen is relatively expensive, and thus that [sic| the economical use of this expensive element, nitrogen,...a reasonable excess of phosphoric acid and potash be applied, sufficient lo more than satisfy the maximum needs of any crop, and that the nitrogen be...
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Proceedings of the Joint Conservation Conference, Washington, D.C ..., Volumen3

United States. National Conservation Commission - 1909
...the mineral elements are relatively cheap, while the nitrogen is relatively expensive, and thus that the economical use of this expensive element, nitrogen,...a reasonable excess of phosphoric acid and potash bo applied, sufficient to more than satisfy the maximum needs of any crop, and that the nitrogen be...
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Report of the National Conservation Commission, Volumen3

United States. National Conservation Commission - 1909
...the mineral elements are relatively cheap, while the nitrogen is relatively expensive, and thus that the economical use of this expensive element, nitrogen,...a reasonable excess of phosphoric acid and potash be applied, sufficient to more than satisfy the maximum needs of any crop, and that the nitrogen be...
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General Agricultural Chemistry

Edwin Bret Hart - 1910 - 334 páginas
...the other hand, since it forms no fixed compounds and is perfectly soluble when in a form useful to plants, is liable to loss from leaching. Furthermore,...the nitrogen be applied in active forms, as nitrate or ammonia, and in such quantities and at such times as will insure the minimum loss of the element...
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The Farmer of To-morrow

Frederick Irving Anderson - 1913 - 308 páginas
...Furthermore, the mineral elements are relatively cheap, while the nitrogen is relatively expensive, and thus the economical use of this expensive element, nitrogen,...a reasonable excess of phosphoric acid and potash be applied, sufficient to more than satisfy the maximum needs of any crop, and that the nitrogen be...
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Bulletin, Tema 58

1910
...mineral elements are relatively cheap, while the nitrogen is relatively expensive, and thus that [sic] the economical use of this expensive element, nitrogen,...good state of cultivation, a reasonable excess of phospnoric acid and potash be applied, sufficient to more than satisfy the maximum needs of any crop,...
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