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ABSTRACT: Soil fertility depletion remains a major challenge in upland rice systems across sub-Saharan Africa, where resource-poor farmers often lack access to mineral fertilizers. This study ...
Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...
Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Thomas J. Brock is a CFA and CPA with more ...
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