 | Wisconsin Farmers' Institutes - 1902 - 340 páginas
...require' approximately six hundred and fifty tons of water, equivalent to a rainfall of nearly six inches. Because of its need for large water supply,...if success is to be had. The liberal application of fer tilizers or the presence of large amounts of readily available plan food will prove of but little... | |
 | New York (State) Dept. of Agriculture - 1898 - 1256 páginas
...moisture by evaporation. The conservation of moisture by frequent tillage cannot be too strongly enforced. The liberal application of fertilizers, or the presence of large amounts of readily available plant-food 55. — Cultivator well suited to potato culture during earlier period of growth. will prove... | |
 | Massachusetts - 1902 - 1258 páginas
...acre would therefore require approximately 650 tons of water, equivalent to a rainfall of nearly six inches. Because of its need for large water supply,...conditions, it follows that the average potato yield is aifected more by water supply than by lack of plant food. The selection of soil and methods of culture... | |
 | Eugene H. Grubb, William Sumner Guilford - 1912 - 652 páginas
...acre would therefore require approximately 650 tons of water, equivalent to a rainfall of nearly six inches. Because of its need for large water supply,...fact in view, if success is to be had. The liberal applications of fertilizers or the presence of large amounts of readily available plant food will prove... | |
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... inches. Because of its need for large water supply, and its remarkable susceptibility to climatic conditions, it follows that the average potato yield is affected more by water supply than by lack of plant food. The selection of soil and methods of... 