Ammonium sulfate
Intuitive traits Crystallized small particles; generally no taste, and some gas taste; water soluble, no residue.
A simple test of the aqueous acidic solution, pH test paper showed a reddish color; bounced on the red iron, gradually melting, white smoke, ammonia smell, leaving debris.
Superphosphate
Intuitive properties loose powder or granular; gray, dark gray or light yellow; sour taste; easy to absorb moisture, feel astringent; part dissolved in water.
The simple test solution is acidic and the pH test paper turns red.
Ammonium bicarbonate
Intuitive traits are generally white or slightly yellow crystals; easily decomposed at room temperature, irritating ammonia odor children; soluble in water; long-acting ammonium bicarbonate is gray, gray, may be mixed with gray powder or particles, a small amount of aqueous solution precipitation.
Simple test of fertilizer at room temperature, hand smelling can smell ammonia; alkaline aqueous solution, pH test paper is dark blue; take a small amount on the red iron, insoluble and volatile white smoke, pungent ammonia Taste.
Potassium chloride
Intuitive traits are white or reddish crystals, of which Canadian products are mostly red flakes, Russian products are mostly red powder, Jordan, China Qinghai and other places are mostly white products; soluble in water, easy to absorb moisture in wet weather melting.
Simply test the aqueous solution to be neutral or slightly acidic, insert the pH test paper into it, the color does not change or turn reddish; put a little fertilizer on the iron sheet and let it burn on the fire, you can see the purple flame.
Ammonium nitrate
Intuitive traits are two kinds of crystalline and granular; white or light yellow; no taste children; soluble in water, easy to absorb moisture in the air melt.
A simple test of the aqueous solution is acidic, and the pH test paper turns red. Burning red iron pieces burn white smoke, ammonia smell, and no residue.
Calcium magnesium phosphate fertilizer
Intuitive traits are generally powdery; dark green, grayish brown, grayish black, grayish and other different colors; no taste; insoluble in water;
Simply test the stirring in the water and insert the pH test paper into the supernatant. The color turns blue-purple and the solution is alkaline.
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