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Supply and demand of chemical fertilizers in Iran H Amirmokri
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agricultural ammonia ammonium nitrate ammonium sulphate amounts analysis Analytical Method AOAC applied bags biuret calcium capacity cent CENTO CENTO region chemical fertilizers chloride compounds containing crops delegate demand determined developing countries diammonium phosphate dicalcium phosphate dilute Dissolve distribution elemental export factors farm farmers fertilizer consumption fertilizer industry fertilizer materials fertilizer production filter flask granules HNO3 important increased Iran kg P/ha labelled Lyallpur manufacturers maximum methyl red micronutrients million tons minimum mixed fertilizers Moisture content NaOH nitrogenous fertilizers nutrients Official Anal organic matter P2O5 and K2O Pakistan Pakistan Standards phosphatic fertilizers phosphoric acid phosphorus plant nutrients potash potassium potassium chloride precipitate present prills problems quality control quantity raw materials reagent sample sieve sodium soil soluble solution specifications standardization of fertilizers storage sulphur superphosphate supply Table tonnes transportation triple superphosphate Turkey uptake urea water soluble yield