Water-soluble macronutrients
Urea for water-soluble fertilizers
For urea in water-soluble fertilizer, check amide nitrogen, biuret and insolubles. Coatings or coarse material in field-grade granules may affect stock filtration.
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Water-soluble macronutrients
Potassium nitrate
Potassium nitrate supplies nitrate nitrogen and potassium. Specify N and K₂O separately, and check stock solution concentration at the lowest preparation temperature.
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Water-soluble macronutrients
Monoammonium phosphate (MAP)
MAP supplies ammonium nitrogen and phosphorus. Compare granular field products with soluble grades by water-soluble phosphorus, insolubles and stock-solution compatibility.
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Water-soluble macronutrients
Water-soluble potassium sulfate
Water-soluble potassium sulfate supplies potassium and sulfur. For chloride-sensitive crops, request a measured chloride value for the grade.
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Water-soluble macronutrients
Ammonium sulfate
Ammonium sulfate supplies ammonium nitrogen and sulfur. For fertigation, also assess insolubles, impurities and source water. Total nitrogen alone does not establish drip compatibility.
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Water-soluble macronutrients
Water-soluble potassium chloride
Evaluate potassium chloride where the formulation tolerates chloride. Include chloride from the water, other fertilizers and potassium chloride in the calculation.
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