A. An area of soil from root surface to 5 cm
B. Root surface
C. Area within the roots
D. All of them
Submitted by: Shafiq Rehman
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
(Sponsored by Sir Tauqeer)
