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Can you give/ suggest me some topics for my investigatory project...?
easy to make/ simple for my physics class...


Sagot :

last year we made BioChar, it is easy to make because the goal of this investigatory project is to make a productive soil wherein there is a low or no matal content and wherein plants can grow easily. the secret to this project is the charcoal content (we were unsuccessful last year because of the low content of charcoal)