...The maize shows by its size the fertility of the black soil of all the valleys here, and so does the manioc, though no manure is ever applied...
David Livingstone 「Missionary Travels and Researches in South Africa」
... At this point of interest the journey had commenced; the deserts were passed; all was fertility and life...
Samuel White Baker 「In the Heart of Africa」
...Beside the flowers which sprang up from the fertility of soil unplanted and unattended, there was the heliotrope, sweet-pea, and cup-rose, transplanted from the island of Cuba...
William Wells Brown 「Clotelle」
... "Men who increase the fertility of the earth are no less useful to their fellow-men, than if they should create new land...
P. J. Proudhon 「What is Property?」
...It is a bird of plain plumage, low tastes, impudent disposition and persistent fertility...
William T. Hornaday 「Our Vanishing Wild Life」
...The fertility varies with the seasonthat is, with the weather...
Harry M. Lamon 「Ducks and Geese」
...Aside from economy of productionrange is desirable from the fact that the breederskeep in better condition and better results inbreeding and fertility are obtained...
Harry M. Lamon 「Ducks and Geese」
...bankiva, or from several, we must not quite overlook, though we must not exaggerate, the importance of the test of fertility...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...That such purity of character and fertility should be suddenly reacquired from so hybridized and sterile a form is an astonishing phenomenon...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Several accounts have been published on the fertility of the offspring from wild and tame swine...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
... I have met with several statements on the fertility of the several breeds when crossed...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...With success in this line there has been the counterbalancing disadvantage ofimpaired vigor, with too often lessened fertility as well as increasedpredisposition to disease...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...The Malays cultivate the tree for the sake of its fruit, and havebeen known to resort to a peculiar ceremony for the purpose ofstimulating its fertility...
Sir James George Frazer 「The Golden Bough」
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