Sounds like scientific study of farming techniques that might involve growing poppies? (12)
I believe the answer is:
pharmacology
'study of farming techniques that might involve growing poppies?' is the definition.
'pharmacology' can be an answer for 'study' (pharmacology is a kind of study). I'm unsure of the rest of the definition.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for pharmacology that I've seen before include "Science of drugs" , "Study of drugs" , "Branch of medicine concerned with drugs" .)