A.Depletion of soil nutrients (especially nitrogen and phosphorous)
B.Soil degradation due to absence of soil cover at certain times
C.Inadequate fuel and food supplies
D.All of the above
A.Depletion of soil nutrients (especially nitrogen and phosphorous)
B.Soil degradation due to absence of soil cover at certain times
C.Inadequate fuel and food supplies
D.All of the above