| 11. | The Hatch Act was driven by farmers'interest in knowing the constituents of early artificial fertilizer.
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| 12. | If the supply of manure or artificial fertilizer is limited, only the seedbeds are fertilized.
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| 13. | His father was a manufacturer of artificial fertilizer.
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| 14. | Without artificial fertilizers there would not be enough food to sustain a population of seven billion people.
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| 15. | Farming organically means using no artificial fertilizers.
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| 16. | Modern use of artificial fertilizers, containing nitrogen, phosphorus, and potassium, has affected the mouths of drainage basins.
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| 17. | Szekely spoke against herbicides, pesticides, artificial fertilizers, the increasing use of food processing, and the dangers of cigarettes.
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| 18. | In the first half of the century, the development of artificial fertilizer made global human population growth possible.
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| 19. | Growing world population pushes the need for artificial fertilizers or greater incorporation of organic systems within agricultural infrastructure.
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| 20. | He switched to sheep fattening, introduced artificial fertilizer, laid out strawberry and asparagus fields and grew fruit trees.
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