Wood chip or Wood pellets:
David Totten
Let us look at the facts:

STORAGE OF HEAT ENERGY - BUFFER TANKS
By DAVID TOTTEN
Is the storage of any significant amount of heat energy in buffer tanks practical?

MUSHROOM COMPOST– THE BASICS AND ISSUES
By Nikodem Sakson
In Poland the main mushroom cropping is done on shelves with phase 3 compost and harvesting is carried out selectively.