Friday, December 15, 2017
Sustainable farm practices are key to long term viability
The stocking density of any farm animals is a critical factor in the long term sustainability of farmland. With chickens, the maximum stocking density of 1500 hens per hectare was established by the industry, academics, politicians and bureaucrats when they prepared the Model Code of Practice for the Welfare of Animals (Domestic Poultry). Nutrients and trace elements in manure can accumulate in the soil, making it toxic for vegetation as well as polluting ground and surface water. A laying hen produces half a cubic metre of manure a year. So with a stocking density of 10,000 hens per hectare approved by Ministers for Consumer Affairs, farmers who follow their advice will see their land covered with 5000 cubic metres of manure per hectare every year. As chicken manure has the highest amount of nitrogen,phosphorus, and potassium of all manures, it will likely render the land useless for farming within a few years. Contamination of groundwater and water courses is also likely.