DNPK - What does DNPK stand for? The Free Dictionary
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dummy variable representing value equal to One if NPK is equal to Zero, and assumes Zero for positive values of NPK; (9) 0.
nitrogen (N), phosphorus (P) and potash (K)] applied per acre of wheat-when NPK>0, otherwise zero; DNPK
Dummy variable representing value equal to one if NPK is equal to zero, and assumes zero for positive values of NPK.