The Book of Wheat: An Economic History and Practical Manual of the Wheat IndustryO. Judd, 1908 - 369 páginas |
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Página 37
... means of repeated selection alone , the length of the ear was doubled , the number of grains per head was nearly trebled , and the tillering power was increased over fivefold . It is only within recent years that wheat experiments of ...
... means of repeated selection alone , the length of the ear was doubled , the number of grains per head was nearly trebled , and the tillering power was increased over fivefold . It is only within recent years that wheat experiments of ...
Página 39
... means of selection alone the yield of wheat can be materially increased , even in a few years . The gain from the increased yield is much greater than the cost of mak- ing the selection , if the work is carried on systematically through ...
... means of selection alone the yield of wheat can be materially increased , even in a few years . The gain from the increased yield is much greater than the cost of mak- ing the selection , if the work is carried on systematically through ...
Página 43
... means of selection , crossbred wheats can thus be reduced in four or five generations to a type so uniform that little or no variation will occur among plants in the field . Whether they will retain their acquired characteristics has ...
... means of selection , crossbred wheats can thus be reduced in four or five generations to a type so uniform that little or no variation will occur among plants in the field . Whether they will retain their acquired characteristics has ...
Página 54
... means a lack in quality as well as in quantity , which makes the use of such seed very hazardous . Whether seed will " run out , " and whether it is profitable occasionally to " change seed " or not , has long been a mooted question . A ...
... means a lack in quality as well as in quantity , which makes the use of such seed very hazardous . Whether seed will " run out , " and whether it is profitable occasionally to " change seed " or not , has long been a mooted question . A ...
Página 58
... means of tillage , fertilizing and irriga- tion . The resulting variations in wheat are quantitative rather than qualitative , except in the case of irrigation , which is practiced on a comparatively small part of the wheat area . This ...
... means of tillage , fertilizing and irriga- tion . The resulting variations in wheat are quantitative rather than qualitative , except in the case of irrigation , which is practiced on a comparatively small part of the wheat area . This ...
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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 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 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