The term meaning pertaining to the formation of blood cells is

Hematopoiesis

Explanation:

Hematopoiesis is the process of blood cell formation and this occurs in the bone marrow. Hemato- is Greek, which means blood. -Poiesis is Greek, which means, creation or production. The bone marrow produces some white blood cells, all red blood cells and platelets. Its purpose is to produce blood for the living organism and replenish blood lost.

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.

not sure if this what   you'r looking for would be percent composition