Agriculture, including horticultural, hydroponic, chemical or general farming, truck gardens, cultivating of field crops, orchards, groves or nurseries for growing or propagation of plants, trees and shrubs, forest use (tree farming), including use of heavy cultivating machinery, spray planes or irrigating machinery, keeping or raising for sale of small animals, birds or poultry, and including structures for processing and sale of products raised on the premises, provided that:
(1) Any commercial grain drier shall be located at least 300 feet from any boundary of the premises on which such use is located, and any noncommercial drier shall be located at least 100 feet from any boundary.
(2) Commercial slaughtering and processing of animals, birds, poultry or fish shall not be conducted on the premises.