 | 1881 - 510 ページ
...been experimentally proved that if a plot of ground be sown with one species of grass, and a similiar plot be sown with several distinct genera of grasses,...and a greater weight of dry herbage, can be raised in the latter than in the former case." Probably, too, the pastor who tries to do many things gets... | |
 | Charles Darwin - 1875 - 504 ページ
...otherwise natural selection can cfl'ect nothing. So it will be with plants. It has been experimentally proved, that if a plot of ground be sown with one...and a greater weight of dry herbage can be raised in the latter than in the former case. Tho same has been found to hold good when one variety and several... | |
 | Charles Darwin - 1896 - 406 ページ
...otherwise natural selection can effect nothing. So it will be with plants. It has been experimentally proved, that if a plot of ground be sown with one...and a greater weight of dry herbage can be raised in the latter than in the former case. The same has been found to hold good when one variety and several... | |
 | Charles Darwin - 1896 - 408 ページ
...sown with one species of grass, and a similar plot be sown with several distinct genera of grasses,a greater number of plants and a greater weight of dry herbage can be raised in the latter than in the former case. The same has been found to hold good when one variety and several... | |
 | Oliver Joseph Thatcher - 1907 - 482 ページ
...otherwise natural selection can effect nothing. So it will be with plants. It has been experimentally proved, that if a plot of ground be sown with one...and a greater weight of dry herbage can be raised in the latter than in the former case. The same has been found to hold good when one variety and several... | |
 | Woodbridge Riley - 1926 - 376 ページ
...otherwise natural selection can effect nothing. Thus it will be with plants. It has been experimentally proved that if a plot of ground be sown with one species...and a greater weight of dry herbage can be raised in the latter than in the former case. Against the doctrine of the diversity of structure might be... | |
 | Thomas A. Boylan, Tadhg Foley - 2003 - 384 ページ
...intense competition for these objects while the other products remained unused. Experiments have proved3 that if a plot of ground be sown with one species...also is it with the lower animals. In like manner the largest and most flourishing populations are found where there is the greatest diversity of employment,... | |
 | James R. Mensch - 2003 - 240 ページ
...Darwin continually observes, an increase in life. Experimentally this is shown, he writes, by the fact that "if a plot of ground be sown with one species...and a greater weight of dry herbage can be raised in the latter than in the former case" (Darwin 1967b, 85). The principle here is that "the greatest... | |
 | Charles Darwin - 2003 - 676 ページ
...do nothing. So it will be with plants. It has been experimentally proved, that if a plot of ground be sown with several distinct genera of grasses, a...of plants and a greater weight of dry herbage can thus be raised. The same has been found to hold good when first one variety and then several mixed... | |
 | Oliver J. Thatcher - 2004 - 456 ページ
...otherwise natural selection can effect nothing. So it will be with plants. It has been experimentally proved, that if a plot of ground be sown with one...and a greater weight of dry herbage can be raised in the latter than in the former case. The same has been found to hold good when one variety and several... | |
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It has been experimentally proved, that if a plot of ground be sown with one species of grass, and a similar plot be sown with several distinct genera of grasses, a greater number of plants and a greater weight of dry herbage can be raised in the latter... 
