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" One will seek to know what the different forms of plant-food are, what they do, from what sources they can be obtained, and how he can use them to best advantage. He will become to some extent an investigator, and will, of necessity, take a deeper interest... "
First Principles of Soil Fertility - Página 241
por Alfred Vivian - 1908 - 265 páginas
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Annual Report, Volumen3

New York (State) Dept. of Agriculture - 1896 - 758 páginas
...agriculture. One will seek to know what the different forms of plant-food are, what they do, from what sources they can be obtained, and how he can use them to best...intelligent labor will yield more profitable results. The chief disadvantages connected with purchasing separate materials are the following: (1) On small...
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Annual Report of the Pennsylvania Department of Agriculture, Tema 5,Parte1

Pennsylvania. Department of Agriculture - 1900 - 1144 páginas
...One will seek to know what the Different forms of plant-food are. what they do. from what sources icy can be obtained, and how he can use them to best advantage....intelligent labor will yield more profitable results. The chief disadvantages connected with purchasing separate materials are the following: (1) On small...
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Annual Report of the Board of Control of the New York Agricultural ..., Tema 14

New York State Agricultural Experiment Station - 1896 - 748 páginas
...agriculture. One will seek to know what the different forms of plant-food are, what they do, from what sources they can be obtained, and how he can use them to best...lifted to a higher plane and his more intelligent febor will yield more profitable results. The chief disadvantages connected with purchasing separate...
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Bulletin, Temas52-59

1899 - 912 páginas
...agriculture. One will seek to know what the different forms of plant-food are, what they do, from what sources they can be obtained, and how he can use them to best...intelligent labor will yield more profitable results. The chief disadvantages connected with purchasing separate materials are the following: (1) On small...
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Annual Report, Volumen4

New York (State) Dept. of Agriculture - 1901 - 510 páginas
...agriculture. One will seek to know what the different forms of plant food are, what they do, from what sources they can be obtained, and how he can use them to best...intelligent labor will yield more profitable results. The chief disadvantages connected with purchasing separate materials are the following: (1) On small...
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The Business of Dairying: How to Conduct Dairy Farming for the Largest Profit

Clarence Bronson Lane - 1909 - 258 páginas
...different forms of plant food are, what they are valuable for and from what source they can be obtained. He will become to some extent an investigator and...will of necessity take a deeper interest in his work. In purchasing the separate ingredients the object sought should be to secure as much nitrogen, phosphoric...
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Fertilizers and Crops: Or, The Science and Practice of Plant-feeding; a ...

Lucius Lincoln Van Slyke - 1912 - 760 páginas
...different forms of plant-food materials are, what they do, from what sources they are derived, how they can be obtained and how he can use them to best advantage. He becomes a student and an investigator and, of necessity, takes a deeper interest in his work. His entire...
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Bulletin ..., Temas64-97

New York State Agricultural Experiment Station - 1894 - 1360 páginas
...agriculture. One will seek to know what the different forms of plant-food are, what they do, from what sources they can be obtained, and how he can use them to best...intelligent labor will yield more profitable results. The chief disadvantages connected with purchasing separate materials are the following : (i) On small...
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