I’m planning to put up a small business which is pertain to BUY & SALE of agricultural products such as COPRA, VEGETABLES & SEAFOODS products.

Find all the rules and regulations and download forms you may need to submit here:
http://www.gov.ph/default.asp?mytab=3
http://www.gov.ph/cat_agriculture/default.asp
http://www.gov.ph/download/

I hope this helps. Good luck with your business…