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Libros Libros 1 - 6 de 6 sobre The conclusion logically follows that on the average farm the great controlling factor...
" The conclusion logically follows that on the average farm the great controlling factor in the yield of crops is not the amount of plant food in the soil, but is a physical factor the exact nature of which is yet to be determined. "
The Book of Wheat: An Economic History and Practical Manual of the Wheat ... - Página 126
por Peter Tracy Dondlinger - 1908 - 369 páginas
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Bulletin, Volúmenes17-30

United States. Bureau of Soils - 1901
...the same character in adjoining fields giving much smaller yields. The conclusion logically follows that on the average farm the great controlling factor...the exact nature of which is yet to be determined. It is not to be deduced from this that fertilizers do not frequently increase the yield of crops, but...
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Experiment Station Record, Volumen15

United States. Office of Experiment Stations - 1903
...of soil, or to some physiological or physical effect is not altogether clear." The authors conclude "that on the average farm the great controlling factor in the yield of crope is not the amount of plant food in the soil, but is a physical factor the exact nature of which...
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Bulletin, Volúmenes48-60

United States. Bureau of Soils - 1908
...soil solution, which latter is the immediate source from which plants feed. From this it was concluded that on the average farm the great controlling factor in the yield (but not necessarily the quality) of crop is not the amount of plant food present, but a physical factor,...
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The History of Allelopathy

R.J. Willis - 2007 - 316 páginas
...the same character in adjoining fields giving much smaller yields. The conclusion logically follows that on the average farm the great controlling factor...the exact nature of which is yet to be determined, (p. 63) The first review of the bulletin appeared in September 1903 in the Scientific American (Anonymous...
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The Southern Planter, Volumen65

1904
...soil and the yield of crops." . . . "The conclusion logically follows that on the average farm tht, great controlling factor in the yield of crops is not the amount of plant food in the soil." . . . "It appears further that practically (theoretically) all soils contain sufficient plant food...
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Yearbook of Agriculture

1904
...soil solution, which latter is the immediate source from which plants feed. From this it was concluded that on the average farm the great controlling factor in the yield (but not neces sariíy the quality) of crop is not the amount of plant food present, but a physical...
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