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Nigerian Journal of Soil Science -- Vol. 17 (2007): Effect of different levels of wood ash on nutrient contents of maize (Zea mays L.) and grain yield in an acid Ultisol of Southeast Nigeria. | 27 USD |
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Nigerian Journal of Soil Science -- Vol. 17 (2007): Effect of Ground Cover by Different Crops on soil Loss and Physicochemical Properties of an Ultisol in South Eastern Nigeria. | 27 USD |
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Total: 54 USD | |||
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