if a pure breeding brown coloured rat BB is crossed with a pure breeding white rat bb, using the diagram only show the genotype of the offspring up to the second filial generation​

F2 generation genotype: BB,2Bb,bb

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.