a. dispose off 'Dhamma' items which have degenerated due to reasons like aging, wrong printing, spoilage and etc? b. Dhamma items: ranging from printed materials to statues etc
Bhikkhus, if you develop and make much this one thing, it invariably leads to weariness, cessation, appeasement, realization and extinction. What is it? It is recollecting the Enlightened One. If this single thing is recollected and made much, it invariably leads to weariness, cessation, appeasement, realization and extinction. Anguttara-Nikaya: Ekanipata: Ekadhammapali: Pañhamavagga VSMVMMWBBTBHTWTBTMy Page
If the items are still usable and the information is correct, consider donating them to the nearby local temple. If the printed materials are too old to be used, I'd usually recite the Ratana Sutta (ref: http://www.accesstoinsight.org/tipitaka ... .piya.html ) and then use a clean clay pot to burn them.
For any explanation you receive, keep in mind that I don't believe the Buddha himself gave instructions on such matters.
Therefore explanations may just as likely be reflective of local cultural practices, as they are "Theravadin" practices. (There is some overlap between the two)
"We should not congratulate someone on the success of their misdeeds, but on the contrary should endeavour to advise him or her to lead a more skilful and wholesome life. If such advice is ignored then we can only give up and let go" - Phra Panyapatipo
Remember that the oldest Buddhist manuscripts discovered after 2000+ years in clay pots under ground in Afghanistan are believed to have been "respectfully disposed of" in this way. And yet someone can still find them useful today.