Why is soil conservation necessary? How might a farmer determine the type of soil he or she needs to grow a certain crop?

Why is soil conservation necessary? How might a farmer determine the type of soil he or she needs to grow a certain crop?

Explanation:

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3