I.Nitrogenous fertilizers
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There are 6 groups.
a. Ammonium fertilizers
i. Ammonium sulphate (NH4)2 SO4 – 20% N ii. Ammonium chloride : NH4Cl2 -24-26% iii. Ammonium phosphate : NH4H2 PO4 -20%N + 20% P2O5 or 16% N and 20% P2O5 iv. Anhydrous ammonium (82%N) v. Ammonium solution- 20-25%N vi. Ammonium carbonate- 21-24%N vii. Ammonium bicarbonate- 17%N
b. Nitrate fertilizers
i. Sodium nitrate or Chilean nitrate : NaNO3 – 16%N ii. Calcium nitrate: CaNO3 – 15.5% N iii. Nitrophosphate
c. Both Ammonium and nitrate fertilizers
i. Ammonium nitrate: NH4NO3- 33-34%N ii. Calcium ammonium nitrate (CAN) – 25, 26 and 28% N iii. Ammonium sulphate nitrate (ASN) – 26%N
d. Amide fertilizers
i. Urea – 46% N ii. Calcium cyanamide- 21 %N iii. Urea phosphate iv. Urea sulphate
e. Nitrogen solutions
i. Anhydrous ammonia ii. Aqueous ammonia iii. Solution containing one or more of the following urea, ammonium nitrate, ammonia
f. Slowly available nitrogenous fertilizers
i. Urea formaldehyde compounds ii. Neem Cake coated Urea NCU iii. Lac Coated Urea(LCU) iv. Sulphur Coated Urea(SCU) v. Urea super granules (USG) vi. Prilled urea (PU)
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Last modified: Wednesday, 7 December 2011, 6:33 AM