The Cereal in America ...O. Judd Company, 1904 - 421 páginas |
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Página x
... variation , p . 19 ; Influence of environment , p . 19 ; Change of seed , p . 20 ; Crossing , p . 21 ; Selection , p . 21 ; Power of specific forms to repro- duce themselves , p . 22 ; Importance of large num- bers , p . 23 . Plant ...
... variation , p . 19 ; Influence of environment , p . 19 ; Change of seed , p . 20 ; Crossing , p . 21 ; Selection , p . 21 ; Power of specific forms to repro- duce themselves , p . 22 ; Importance of large num- bers , p . 23 . Plant ...
Página 10
... variation in the adaptability of different soils under the same climatic conditions . Certain soils are much better adapted to wheat and grass than for maize and potatoes , while other soils are much better adapted to maize and potatoes ...
... variation in the adaptability of different soils under the same climatic conditions . Certain soils are much better adapted to wheat and grass than for maize and potatoes , while other soils are much better adapted to maize and potatoes ...
Página 18
... variations that were considered desirable by the gardener without any conscious attempt to produce these specific forms . 37. Examples of Definite Improvement . - The sugar beet is an illustration of systematic breeding to bring about a ...
... variations that were considered desirable by the gardener without any conscious attempt to produce these specific forms . 37. Examples of Definite Improvement . - The sugar beet is an illustration of systematic breeding to bring about a ...
Página 19
... Variation . - Variation is the basis of selec- tion . Plants must vary or they could not be selected . are two general methods of producing variations , viz .: I. There Environment , such as soil , climate , space , cultivation , etc. 2 ...
... Variation . - Variation is the basis of selec- tion . Plants must vary or they could not be selected . are two general methods of producing variations , viz .: I. There Environment , such as soil , climate , space , cultivation , etc. 2 ...
Página 21
... variation . Yield in grains of 100 plants , showing greater variation in yield of hybrid wheat than of either parent form . The yield of the hybrid is indicated by the line marked -x- ( After Hays . ) Crossing is also employed not only ...
... variation . Yield in grains of 100 plants , showing greater variation in yield of hybrid wheat than of either parent form . The yield of the hybrid is indicated by the line marked -x- ( After Hays . ) Crossing is also employed not only ...
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Términos y frases comunes
aleurone aleurone layer barley bran breeding bushels bushels per acre cent cereals climate clover color common wheat corn crop crude fiber culm cultivated dent maize drill dry matter ears embryo endosperm farm feet field five flint flour flowering glume fodder four germination gliadin glumes gluten grade grain grass growing grown growth harrow harvested Hessian fly hull husk Illinois Station inches deep increase influence injury insects land less lime maize plant manure maturity method nitrogen North North Dakota oats obtained panicle percentage phosphoric acid plat plowing pollen pounds produced protein rachis rainfall rice ripening roots rows season seed bed selection silage smut soil sowing sown species spike spikelets spring wheat stalks starch Station found stover straw sweet maize tassel tion U. S. Dept usually variation vary weeds winter wheat yellow yield of grain yield of maize
Pasajes populares
Página 14 - What would be the result? In five staples only in the United States alone the inexhaustible forces of nature would produce annually without effort and without cost: « 5,200,000 extra bushels of corn : 15,000,000 extra bushels of wheat; 20,000,000 extra bushels of oats; 1,500,000 extra bushels of barley; 21,000,000 extra bushels of potatoes.
Página 343 - No. 3 barley shall Include slightly shrunken and otherwise slightly damaged barley not good enough for No. 2. No. 4 barley shall include all barley fit for malting purposes not good enough for No. 3. No. 5...
Página 275 - No. 3 Yellow Corn shall be three-fourths yellow, reasonably dry and reasonably clean, but not sufficiently sound for No. 2.
Página 14 - The vast possibilities of plant breedinig can hardly be estimated. It would not be difficult for one man to breed a new rye, wheat, barley, oats or rice which would produce one grain more to each head, or a corn which would produce an extra kernel to each ear, another potato to each plant, or an apple, plum, orange or nut to each tree. What would be the result?
Página 15 - But these vast possibilities are not alone for one year, or for our own time or race, but are beneficent legacies for every man, woman or child who shall ever inhabit the earth. And who can estimate the elevating and refining influences and moral value of flowers with all their graceful forms and bewitching shades and combinations of colors, and exquisitely varied perfumes?