I know that pine needles acidify the soil and that oak leaves also
acidify the soil. But what about all other
kinds of leaves and branches? Is it only pine and oak leaves and
branches? I would think that all green
leaves and branches acidify the soil. I did some searching but found
no research that addresses this question.

Basically I want to know if all green leaves and branches act to
acidify the soil when used as a mulch?

I cannot think of any alkali or salts in plant tissue, so that plant
leaves and branches are either acid or
neutral.

Question: how good is newspaper as a acidifer?

Archimedes Plutonium
www.iw.net/~a_plutonium
whole entire Universe is just one big atom
where dots of the electron-dot-cloud are galaxies