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Soil Nutrient Balance at Different Spatial Scales: Examining Soil Fertility Management and Sustainability of Mixed Farming Systems in Ethiopia (eBook, PDF)

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Soil nutrient balances are used as indicators of sustainability: from the sum of nutrient inputs and outputs it is possible to define agroecosystems as accrediting, balanced or impoverished. The value of such approaches increases if nutrient balances are related to nutrient stocks in order to estimate the fraction used per cropping cycle to offset potentially negative balances. This thesis reports the results of nutrient balances and soil fertility management studies at different spatial scales (i.e. national, state, farming system/watershed, farm and field). The overall goal was to examine so...

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