Hematite
Gangue
Ore
Residue
Nitrogenous fertilizers
Micronutrients
Phosphorus fertilizer
All of the above
What is a measure of rigidity?
Stiffiness
Jardmess
Strength
Modulus of elasticity
Carbon filters
Centrifuge
Annealing
Refining
The percentage of nitrogen in Urea is _____________%
Potassium phosphate