B-Kidneys
The kidneys act as filters that strain urea and excess salts from the bloodstream to release them in the urine.
CHNOPS
Carbon
Hydrogen
Nitrogen
Oxygen
Phosphorus
Sulfur
A
Planting the same crop over and over again depletes the nutrients of the soil and it also allows any pests to get used to the soil. That’s why many people practice crop rotation.
