Comparative effectiveness of SOP and MOP for crop productivity in Pakistani soils – A review

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Review Paper 01/04/2015
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Comparative effectiveness of SOP and MOP for crop productivity in Pakistani soils – A review

Azhar Hussain, Muhammad Arshad, Hafiz Tanvir Ahmad, Qudsia Nazir, Ayesha Mustafa, Ali Afzal, Hassan Zeb
Int. J. Agron. Agri. Res.6( 4), 256-267, April 2015.
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The world population is increasing rapidly and it is expected that it will rise up to 8 billion in 2025. In this condition, there is a huge population pressure and ultimately this pressure transfer to agricultural soils to feed such a huge crowd of people. Pakistan is an agriculture country with most of the areas deficient of inherent soil fertility. Because of increasing population, there is a need to increase the cropping intensity. This increased crop intensity requires fertilizer application, especially of primary macronutrients along with micronutrients. Soils are becoming deficient of K which may be due to either imbalance fertilizer use of ignorance of farmers to use K fertilizer due to escalating fertilizer prices. So, it is need of time to use those K sources which are economical, profitable and ensure adequate crop yield and quality. This article compares Sulphate of Potash (SOP) and Morate of Potash (MOP) for their effectiveness for crop productivity as well as profitability according to specific soil conditions. No matter, MOP is cheap source but it cannot be used in every condition or some extra practices required like excessive irrigation which is quite difficult in present scenario of water shortage. So, need of the time is along considering the effectiveness of MOP and SOP, It would also evaluate the effectiveness of another source of potassium which have also considerable amount of K2O in them like potassium nitrate containing 44% K2O and 13% nitrogen and potassium magnesium sulphate with 20-30% K2O, 11% magnesium (Mg) and 22% sulphur (S).


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