2Department for Environment, Food & Rural Affairs .Protecting our Water, Soil and Air ,A Code of Good Agricultural Practice for farmers, growers and land managers[EB/OL]. httpa://www, gov. uk/government/ publications/protecting-our-water- soil-and-air. 23 December 2013.
3Alberta AgriCulture and Food .Nutrient Management Planning Guide for Alberta Canada: Manure Application and Alberta' s Agricultural Operation Practices Act[Z].
4Manitoba Canada Agriculture, Food and Rural Development, Land Base Requirements for New and Expanding Livestock Operations. http://www. gov. mb. ca/agriculture/environment/ nutrient-management/land-base- requirements-for-new-and- expanding-livestock-operations, html.
