The Book of Wheat: An Economic History and Practical Manual of the Wheat IndustryO. Judd, 1908 - 369 páginas |
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Página 123
... supply is sufficient to irrigate only a small fraction of the arid domain , approximately three - fourths of a billion acres , several million acres are already under irrigation , and there is a good prospect that many more millions ...
... supply is sufficient to irrigate only a small fraction of the arid domain , approximately three - fourths of a billion acres , several million acres are already under irrigation , and there is a good prospect that many more millions ...
Página 127
... supply different quantities of water to the plant , irre- spective of the percentage of water actually present in the soil . As water conveys the nutritive solutions to the plant , when the supply of water is inadequate , there may also ...
... supply different quantities of water to the plant , irre- spective of the percentage of water actually present in the soil . As water conveys the nutritive solutions to the plant , when the supply of water is inadequate , there may also ...
Página 129
... supplies nitrogenous plant food and aids in making mineral plant foods and fertilizers more available and effective ... supply in the soil is to grow clovers and grasses in the crop rotation and plow under all plant refuse . Leguminous ...
... supplies nitrogenous plant food and aids in making mineral plant foods and fertilizers more available and effective ... supply in the soil is to grow clovers and grasses in the crop rotation and plow under all plant refuse . Leguminous ...
Página 130
... supply will be indefinitely maintained , and that this actual yield of plants adapted to the soil depends mainly , under favorable climatic conditions , upon the cultural methods and suitable crop rotation , a conclusion strictly in ...
... supply will be indefinitely maintained , and that this actual yield of plants adapted to the soil depends mainly , under favorable climatic conditions , upon the cultural methods and suitable crop rotation , a conclusion strictly in ...
Página 131
... supply is so limited that a " nitrogen famine " had already been predicted , but the discovery of nitrogen- gathering bacteria seems destined to lead to the utilization of air nitrogen at a nominal cost . Plants normally obtain through ...
... supply is so limited that a " nitrogen famine " had already been predicted , but the discovery of nitrogen- gathering bacteria seems destined to lead to the utilization of air nitrogen at a nominal cost . Plants normally obtain through ...
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Términos y frases comunes
acre agriculture Amer American amount annual Argentina average baked bran bread bucket shop bushels bushels of wheat Canada cars cents per bushel century cereals Chicago chinch bug climate combined harvester commercial corn cost crop rotation cultivation durum wheat early elevators England Europe experiment station export factor farm farmers fertilizers flour germination gluten grower grown harvest header Hessian fly Hybrid important increased industry insects irrigation Kansas kernel land larvæ loss macaroni machine machinery manure methods miller milling Minnesota moisture nitrogen North Dakota operations Pacific coast phosphoric acid plow potash pounds practically price of wheat produced profitable railroads Red river valley Rept rotation Russia rust seed shipped smut soil sown speculative spores spring wheat storage straw supply threshing tion transportation United varieties weeds wheat crop wheat growing wheat plant winter wheat Yearbook U. S. Dept yield
Pasajes populares
Página 77 - Texas, Algeria, Central Asia, China, Japan, Morocco. June — California, Oregon, Mississippi, Alabama, Georgia, North Carolina, South Carolina, Tennessee, Virginia, Kentucky, Kansas, Arkansas, Utah, Colorado, Missouri, Turkey, Greece, Italy, Spain, Portugal, south of France. July — New England, New York. Pennsylvania, Ohio. Indiana, Michigan, Illinois. Iowa, Wisconsin, southern Minnesota, Nebraska, upper Canada, Roumania, Bulgaria, Austria, Hungary, south of Russia, Germany, Switzerland, south...
Página 36 - This preservation of favourable individual differences and variations, and the destruction of those which are injurious, I have called Natural Selection, or the Survival of the Fittest.
Página 77 - Columbia, Belgium, Holland, Great Britain, Denmark, Poland, Central Russia. September and October — Scotland, Sweden, Norway, North of Russia. November — Peru, South Africa.
Página 143 - Chief of the Bureau of Soils in the United States Department of Agriculture...
Página 126 - 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.
Página 243 - ... made under the rules of some commercial body, by which the conditions as to the unit of amount, the quality, and the time of delivery are stereotyped, and only the determination of the total amount and the price is left open to the contracting parties."* Another important class of transactions are "cash...
Página 130 - It appears, further, that practically all soils contain sufficient plant food for good crop yield, that this supply will be indefinitely maintained, and that the actual yield of plants adapted to the soil depends mainly, under favorable climatic conditions, upon the cultural methods and suitable crop rotation.
Página 125 - ... diversified in appearance and quality ; yet, as it was stated in the Introductory Lecture, they consist of different proportions of the same elements ; which are in various states of chemical combination, or mechanical mixture. The substances which constitute soils have been already mentioned. They are certain compounds of the earths, silica, lime, alumina, magnesia...
Página 137 - Barnyard manure contains all the fertilizing elements required by plants in forms that insure plentiful crops and permanent fertility to the soil. It not only enriches the soil with the nitrogen, phosphoric acid, and potash, which it contains, but it also renders the stored-up materials of the soil more available, improves the mechanical condition of the soil, makes it warmer, and enables it to retain more moisture or to draw it up from below.
Página 74 - We have ploughed, we have sowed, We have reaped, we have mowed We have brought home every load, Hip, hip, hip, Harvest home ! and thus, sir, the whole assembly shout