The surface area per gram of soil is -------------- 50-100
m2
100g of loam soil has surface area ---------------
75m2/g
Hence the surface area of 100g of soil sample= 75m2/g
x 100g = 7500 m2
Area of football field    = 120 yards x 160
feet
                                   Â
= 120(0.914 metres) x 160 (0.305 metres)
                                   Â
= 5352.384 m2
Hence the area of football field = 5352.384 m2
Now we have to find 7500 m2 is equal to how many
football fields?
the area of one football field = 5352.384 m2
? football
fields                    Â
= 7500 m2
= 7500m2 / 5352.384 m2
= 1.4 football fields
