| 41. | The result is declining soil fertility and low yields.
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| 42. | One of the two or three fields was fallowed each year to recover soil fertility.
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| 43. | Add alfalfa meal and compost to help boost soil fertility, which will encourage better growth.
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| 44. | Rituals with Kostroma were aimed at improving soil fertility.
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| 45. | This knowledge is critical to understanding how food webs affect important qualities such as soil fertility.
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| 46. | The average soil fertility score on a 100 point scale has a composition of 37 points.
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| 47. | Soil fertility has also declined over widespread areas.
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| 48. | The best soils are still agriculturally productive through well managed soil fertility and erosion control plans.
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| 49. | George Washington Carver reports the ability of peanuts and sweet potatoes to revitalize exhausted soil fertility.
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| 50. | Declining soil fertility, drought, flooding and deforestation drove 25 million " environmental refugees " from their land.
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