| Royal Agricultural Society of England - 1859 - 624 頁
...altogether averse to each other, nature opposes no barrier to their successful admixture ; so that, in the course of time, by the aid of selection and...weeding, it is practicable to establish a new breed altogether. This, in fact, has been the history of our principal breeds. The Leicester was notoriously... | |
| Royal Agricultural Society - 1859 - 618 頁
...altogether averse to each other, nature opposes no barrier to their successful admixture ; so that, in the course of time, by the aid of selection and...weeding, it is practicable to establish a new breed altogether. This, in fact, has been the history of our principal breeds. The Leicester was notoriously... | |
| Stephen Lincoln Goodale - 1861 - 176 頁
...altogether averse to each other, nature opposes no barrier to their successful admixture ; so that in the course of time, by the aid of selection and...weeding, it is practicable to establish a new breed altogether. This, in fact, has been the history of our principal breeds. * * * We confess that we cannot... | |
| New York State Agricultural Society - 1865 - 738 頁
...altogether adverse to each other, nature opposes no barrier to their successful admixture; so that, in the course of time, by the aid of selection and...weeding, it is practicable to establish a new breed altogether. This, in fact, has been the history of our principal breeds. The Leicester was notoriously... | |
| Michigan. State Board of Agriculture - 1867 - 534 頁
...altogether averse to each other, nature opposes no barrier to their successful admixture; so that, in course of time, by the aid of selection and careful...weeding, it is practicable to establish a new breed altogether. This, in fact, has been the history of our principal breeds. The Leicester was notoriously... | |
| Robert Oliphant Pringle - 1868 - 918 頁
...are altogether averse to each other, Nature opposes no barrier to their successful admixture, so that in the course of time, by the aid of. selection and careful breeding, it is practicable to establish a new breed altogether. This in fact has been the history... | |
| Duncan George Forbes Macdonald - 1872 - 862 頁
...altogether adverse to each other, Nature opposes no barrier to their successful admixture ; so that, in the course of time, by the aid of selection and...weeding, it is practicable to establish a new breed altogether. This, in fact, has been the history of our principal breeds. The Leicester was notoriously... | |
| William Charles Spooner - 1874 - 464 頁
...are altogether averse to each other, nature opposes no barrier to their successful admixture, so that in the course of time, by the aid of selection and...weeding, it is practicable to establish a new breed altogether. This, in fact, has been the history of our principal breeds. The Leicester was notoriously... | |
| Manly Miles - 1878 - 440 頁
...of Agriculture, vol. i., pp. 170-179. 8 " Code of Agriculture," p. 95. cessful admixture ; so that, in the course of time, by the aid of selection and...weeding, it is practicable to establish a new breed altogether.1 . . . Let us conclude," he then says, "by repeating the advice that, when equal advantages... | |
| Joseph John Murphy - 1879 - 650 頁
...attains its maximum.1 But, to return to the subject of domestic animals : — " In the course of time and by the aid of selection and careful weeding, it is...but even then an occasional reversion, or failure to breed true, may be expected." 2 " Himalayan Rabbit." — There are, however, some instances of very... | |
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