The Book of Wheat: An Economic History and Practical Manual of the Wheat IndustryO. Judd Company, 1922 - 369 páginas |
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Página 36
... natural selection in early development , which was a result of the coincidence that the quality of wheat as a human food and the reproductive functions of the plant were both united in its seed . The plant producing the greatest number ...
... natural selection in early development , which was a result of the coincidence that the quality of wheat as a human food and the reproductive functions of the plant were both united in its seed . The plant producing the greatest number ...
Página 40
... Natural selection is also continually operative , especially in connection with such qualities as rust resistance and hardiness against heat , drought or cold . Thus wheat naturally tends to adapt itself to its environment . Such crude ...
... Natural selection is also continually operative , especially in connection with such qualities as rust resistance and hardiness against heat , drought or cold . Thus wheat naturally tends to adapt itself to its environment . Such crude ...
Página 45
... successful and practi- cal way to fight disease is to aid natural selection in producing disease - resistant or immune plants , rather than to attempt to cure the disease . " As a foundation for rational IMPROVEMENT OF WHEAT 45.
... successful and practi- cal way to fight disease is to aid natural selection in producing disease - resistant or immune plants , rather than to attempt to cure the disease . " As a foundation for rational IMPROVEMENT OF WHEAT 45.
Página 46
... natural groups of wheats . " A century ago wheat was wheat , but now thousands of varieties have been bred up which thrive best under the local conditions for which they were bred , and often they satisfy conditions , uses and tastes ...
... natural groups of wheats . " A century ago wheat was wheat , but now thousands of varieties have been bred up which thrive best under the local conditions for which they were bred , and often they satisfy conditions , uses and tastes ...
Página 47
... NATURAL ENVIRONMENT . The individual plant is the complex resultant of two forces , heredity and environment . Those characteristics of wheat which are acquired from environmental influences and which are transmissible from generation ...
... NATURAL ENVIRONMENT . The individual plant is the complex resultant of two forces , heredity and environment . Those characteristics of wheat which are acquired from environmental influences and which are transmissible from generation ...
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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 field 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 operation Pacific coast phosphoric acid plow potash pounds practically produced profitable railroads raised Red river valley Report 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