I had a passing thought regarding the mulching of acid loving plants.
Much ink is spilled over the availability of various elements as a
function of pH. There is a fairly narrow band of pH that has decent
solubility for most micro-nutrients and phosphorous. The implicit
assumption is that the entire rootzone (rootball?) will be homogenous
with regard to pH. I think this is both simplistic and undesirable.
Having a rootball stratified with respect to pH virtually guarentees
that ALL elements will be highly available to the plant somewhere in the
rootball.
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