A farm is experiencing extensive crop loss due to high rains flushing away the nutrients in the topsoil. Which of the following approaches would best help the farmers alleviate the problem? a) Fertilizing the area with manure to eliminate the need for inorganic chemical fertilizers
b)Amending the soil with clay to increase the water-holding capacity of the soil
c)Amending the soil with sand to increase the permeability of the soil
d)using contour plowing to decrease soil erosion