(8)Doing business. -- The term "doing business" means any activity of a corporation or partnership which enjoys the benefits and protection of the government and laws of this state, except the activity of agriculture and farming, which shall mean the production of food, fiber and woodland products (but not timbering activity) by means of cultivation, tillage of the soil and by the conduct of animal, livestock, dairy, apiary, equine or poultry husbandry, horticulture, or any other plant or animal production and all farm practices related, usual or incidental thereto, including the storage, packing, shipping and marketing, but not including any manufacturing, milling or processing of such products by persons other than the producer thereof. The activity of agriculture and farming shall mean such activity, as above defined, occurring on not less than five acres of land and the improvements thereon, used in the production of the aforementioned activities, and shall mean the production of at least one thousand dollars of products per annum through the conduct of such principal business activities as set forth in section ten, article one-a, chapter eleven of this code.