PNM 300 EXAM 1 QUESTIONS AND ANSWERS GRADED A+
Governing bodies of fertilizers - (ANSWER)AAPFCO, Association of American Plant Food Control Officials
Association of Official Analytical Chemists, AOAC
IPNI, International Plant Nutrition Institute
Fertilizer - (ANSWER)is any substance that contains one or more recognized plant nutrients, is used for
its plant nutrient content, and is claimed to have value in promoting plant growth
fertilizer exclusions - (ANSWER)unmanipulated animal or vegetable manures, marl, liming material,
sewage sludge other than finished sewage sludge products, and wood ashes
Fertilizer grade - (ANSWER)is the guaranteed minimum content of water-soluble (or slow-release) N,
available (citrate-soluble) P, and available (water-soluble) K, expressed as N-P2O5-K2O. Labeling of
fertilizers is highly standardized.
Mixed fertilizer - (ANSWER)is any fertilizer containing any combination of fertilizer materials. In
Wisconsin and many other states, the sum of N, P2O5, K2O must be 24% or greater to meet this
designation, else it can be marketed as a 'specialty mixed fertilizer' or 'soil amendment'
Complete fertilizer - (ANSWER)any fertilizer containing all three of of the primary nutrients, N, P, and K.
Note that it is not a complete plant food since it may lack Ca, Mg, S, and all the micronutrients.
Ballast - (ANSWER)or filler, in fertilizers is the non-NPK portion, such as chloride in potassium chloride or
calcium in monocalcium phosphate, the active component of triple superphosphate
N sources: - (ANSWER)Urea [ (NH2)2CO ]
Ammonium nitrate [ NH4NO3 ]
Potassium nitrate [ KNO3 ]
Ammonium phosphate [ NH4H2PO4 and (NH4)2HPO4 ]
Governing bodies of fertilizers - (ANSWER)AAPFCO, Association of American Plant Food Control Officials
Association of Official Analytical Chemists, AOAC
IPNI, International Plant Nutrition Institute
Fertilizer - (ANSWER)is any substance that contains one or more recognized plant nutrients, is used for
its plant nutrient content, and is claimed to have value in promoting plant growth
fertilizer exclusions - (ANSWER)unmanipulated animal or vegetable manures, marl, liming material,
sewage sludge other than finished sewage sludge products, and wood ashes
Fertilizer grade - (ANSWER)is the guaranteed minimum content of water-soluble (or slow-release) N,
available (citrate-soluble) P, and available (water-soluble) K, expressed as N-P2O5-K2O. Labeling of
fertilizers is highly standardized.
Mixed fertilizer - (ANSWER)is any fertilizer containing any combination of fertilizer materials. In
Wisconsin and many other states, the sum of N, P2O5, K2O must be 24% or greater to meet this
designation, else it can be marketed as a 'specialty mixed fertilizer' or 'soil amendment'
Complete fertilizer - (ANSWER)any fertilizer containing all three of of the primary nutrients, N, P, and K.
Note that it is not a complete plant food since it may lack Ca, Mg, S, and all the micronutrients.
Ballast - (ANSWER)or filler, in fertilizers is the non-NPK portion, such as chloride in potassium chloride or
calcium in monocalcium phosphate, the active component of triple superphosphate
N sources: - (ANSWER)Urea [ (NH2)2CO ]
Ammonium nitrate [ NH4NO3 ]
Potassium nitrate [ KNO3 ]
Ammonium phosphate [ NH4H2PO4 and (NH4)2HPO4 ]
