Ключевые слова: agriculture, autumn, biosolids, commercial, compost, countryside, environment, equipment, excavators, farm, farmer, farming, farmland, fertilizer, fertilizing, field, growth, harvest, heap, industry, livestock, machinery, manure, muck, natural, nitrogen, organic, ranch, rural, season, shovel, sludge, soil, spreading, summer, tractor, trailer, training, transport, waste,