They can have a child with straight hairline even though they posses the dominant phenotype only if the genotype is heterozygous.
Buffers absorb the free hydrogen ions and hydroxide ions that result from chemical reactions. Because they can bond these ions, they prevent increases or decreases in pH. An example of a buffer system is the bicarbonate system in the human body.
Explanation:
I would change its existing soil. some trees and shrubs thrive if you replace existing soil with certain minerals and fertilizers where you plant the Bush..
in my case, we have clay soil poor 4 most plants., b4 planting outside, put fertilized soil in the hole your planting 1st, then existing soil..