Mass. Gen. Laws ch. 111, § 142L: Agricultural burning

Section 142L. Notwithstanding the provisions of sections one hundred and forty-two A to one hundred and forty-two E, inclusive, the burning of tree prunings, diseased plant materials, and brush from land clearing operations, which are the direct result of the normal commercial pursuit of agriculture, as defined in section one A of chapter one hundred and twenty-eight, shall be allowed subject to the permission of the local fire chief which need not be in writing. Said permission shall be based solely upon whether or not appropriate meteorological conditions exist to ensure safe burning.