Economics of Potassium Based Fertilizers for Sustainable Crop Production
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Date
2013
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Abstract
In recent years utilization of in-organic fertilizers in Tanzania has more than doubled due to
many factors including government subsidies through the National Input Voucher Scheme
(NAIVS). However the increase is more pronounced on use of Urea, Di-Ammonium
Phosphate (DAP) and Calcium Ammonium Nitrate (CAN) which accounts for more that 60%
while Potash fertilizer through NPK and other compound fertilizers account for the rest.
Using the "Law of Minimum", this paper analyse and model the missing opportunity for
maximizing crop productivity and associated economic losses due dismal levels of Potash
fertilizer utilization the country. The paper suggest for a strategic fertilizer blending
programmes to increase use of potash utilization to avoid the trap evidenced by the Law of
Minimum.
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Keywords
Potash, Fertilizer, Crop production, Law of minimum, Tanzania