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The following are some ways by which soil is conserved.
(i) Reducing speed of surface runoff
(ii) Trapping soil
(iii) Reducing evaporation of soil water.
(iv) Reducing impact of rain drops.
Which two ways are as a result of contour farming?
A.(i) and (ii)
B.(ii) and (iii)
C.(iii) and (iv)
D.(i) and (iv)