Environmental Studies
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[3] Vegetative barriers planted on the contour have been found to create low-cost "natural" terraces.
[4] Conservation tillage systems are said to have all but one of the following advantages over ...
[6] Of the macronutrients, which can be most correctly said to be a renewable resource?
[7] The data in the following Table suggest the occurrence of a positive synergism between two ...
[9] Which of the following nutrient elements is usually present in the soil solution as a simple cation?
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