Question

Followings are the slow release fertilizers having low water solubility that undergo chemical and/or microbial decomposition when applied to soil.
(A). Urea-formaldehyde
(B). Phenyl phosphorodiamidate (PPDA)
(C). Urea-Z
(D). Crotonylidene diurea
Choose the correct answer from the options given below:

• A. (A), (C) and (D) only.
• B. (A), (B) and (D) only.
• C. (A), (B), (C) and (D).
• D. (B), (C) and (D) only.

Hint:

To identify slow-release options: look for urea-aldehyde condensation polymers, such as Urea-formaldehyde (UF), Isobutylidene diurea (IBDU), and Crotonylidene diurea (CDU). Compounds like PPDA or DCD are inhibitors, not slow-release nutrient sources.

Answer 1

The Correct Option is A