Integrated farming system aims to deliver more sustainable agriculture through a whole farm management approach. It is based on the concept that "waste is only a misplaced resource" and integrates different farming components like crops, livestock, fisheries to maximize resource use efficiency. Some key problems with present agriculture include declining yields and incomes. Integrated farming system models combine different enterprises like agriculture with livestock, poultry, fisheries or horticulture to improve productivity, profitability and sustainability while addressing food and nutritional security of small farmers. Elements include watershed management, biogas, composting, and integrating crops with fish, ducks, pigs, goats or horticulture.