The Book of Wheat: An Economic History and Practical Manual of the Wheat IndustryOrange Judd Company, 1919 - 369 páginas |
Dentro del libro
Página 163
... spores . ( 1 ) Aecidiospores ( injuring spores ) are the first spores found in the year . They occur on shrubs , or herbs other than grasses . ( 2 ) Uredospores ( blight spores ) appear in the early summer , and are often called summer ...
... spores . ( 1 ) Aecidiospores ( injuring spores ) are the first spores found in the year . They occur on shrubs , or herbs other than grasses . ( 2 ) Uredospores ( blight spores ) appear in the early summer , and are often called summer ...
Página 164
... spores that are formed , and these red summer spores , the uredospores , are thus enabled to drop off and float away upon the air to other wheat plants . If moisture is present they germinate at once , and the en- tire above process is ...
... spores that are formed , and these red summer spores , the uredospores , are thus enabled to drop off and float away upon the air to other wheat plants . If moisture is present they germinate at once , and the en- tire above process is ...
Página 165
... spores are formed . The floors of the cups start pali- sade - like chains of the spores , which , when mature , again take wings with the wind . These are the wheat infecting æcidio- spores with which we began , and the life cycle is ...
... spores are formed . The floors of the cups start pali- sade - like chains of the spores , which , when mature , again take wings with the wind . These are the wheat infecting æcidio- spores with which we began , and the life cycle is ...
Página 166
... spore beds beneath the bran layer , con- taining both uredospores and teleutospores that subsequently germinated . This demands a new line of investigation , for it has ... spores to the heading wheat . That the spores 166 THE BOOK OF WHEAT.
... spore beds beneath the bran layer , con- taining both uredospores and teleutospores that subsequently germinated . This demands a new line of investigation , for it has ... spores to the heading wheat . That the spores 166 THE BOOK OF WHEAT.
Página 167
... spores are thus brought to the wheat is shown by the fact that screened plants are not rusted , and that distilled water exposed to the air will gather great numbers of the spores in the short period of a half hour . The more soft and ...
... spores are thus brought to the wheat is shown by the fact that screened plants are not rusted , and that distilled water exposed to the air will gather great numbers of the spores in the short period of a half hour . The more soft and ...
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acre agriculture amount annual Argentina average baked bread broadcast seeder bucket shop bushels bushels of wheat Canada cars cents per bushel century cereals Chicago climate combined harvester commercial corn cost crop rotation cultivation Dakota durum wheat early elevators England Europe experiment station export factor farm farmers feet fertilizers flour germination gluten grain grower grown harvest header Hessian fly Hybrid important increased industry insects irrigation Kansas kernel land larvæ loss macaroni machine machinery manure methods milling moisture nitrogen North North Dakota operation Pacific coast phosphoric acid plow potash pounds practically primary markets produced profitable railroads raised Red river valley Rept rotation Russia rust seed shipped smut soil sown speculative spores spring wheat storage straw supply threshing tion trade transportation United varieties weeds wheat crop wheat growing wheat plant winter wheat Yearbook U. S. Dept yield