Potential Environmental ConcernsWater quality problems can occur when nutrients are added to the soil at a time when they could be removed in surface runoff from rainfall or snow melt at rates exceeding that removed by the crop, or if applied at times that they cannot be utilized by the crop.
When nitrogen or phosphorus are present in lakes or rivers at a high concentration, a condition called "eutrophication" or biological enrichment can occur. High nitrogen from the Mississippi River has been blamed for a hypoxic or "dead" zone in the Gulf of Mexico, where excess algae grow in response to the enriched nutrient solution and few fish can be found. When the algae die, their decomposition consumes enough dissolved oxygen to suffocate fish and other animal life. Sources of nitrogen contributing to the problem include agricultural runoff, sewage treatment plants, atmospheric nitrogen, and other sources.
Excessive nitrate in ground water can present a direct health hazard to very young infants. Ingestion of nitrate (NO3) can bind with hemoglobin in the infant's bloodstream and cause a condition called methemoglobinemia or "blue baby" syndrome. Nitrate does not bind to soil particles and is quite soluble, making it susceptible to leaching into groundwater if not used by the crop.
When nitrogen or phosphorus are present in lakes or rivers at a high concentration, a condition called "eutrophication" or biological enrichment can occur. High nitrogen from the Mississippi River has been blamed for a hypoxic or "dead" zone in the Gulf of Mexico, where excess algae grow in response to the enriched nutrient solution and few fish can be found. When the algae die, their decomposition consumes enough dissolved oxygen to suffocate fish and other animal life. Sources of nitrogen contributing to the problem include agricultural runoff, sewage treatment plants, atmospheric nitrogen, and other sources.
Excessive nitrate in ground water can present a direct health hazard to very young infants. Ingestion of nitrate (NO3) can bind with hemoglobin in the infant's bloodstream and cause a condition called methemoglobinemia or "blue baby" syndrome. Nitrate does not bind to soil particles and is quite soluble, making it susceptible to leaching into groundwater if not used by the crop.
Nutrient
Management for Scholarship
http://www.ballance.co.nz/products/specialist+products/nutrient+budgets
http://www.deernz.org/productivity-improvement-hub/farm-environment/water-soils/land-environment-planning/waterway#.UbKcWfk3CSo
http://www.youtube.com/watch?v=L6AUodAbsiA&feature=plcp (Australia)
http://www.dairynz.co.nz/file/fileid/27244
http://www.side.org.nz/IM_Custom/ContentStore/Assets/8/51/07b888382786db6b4a814c6fe24658b3/Nutrient%20management%20on%20the%20LUDF;%20Nutrient%20budgeting%20for%20efficent%20productoin.pdf
http://www.grassland.org.nz/publications/nzgrassland_publication_682.pdf
http://maxa.maf.govt.nz/mafnet/rural-nz/sustainable-resource-use/resource-management/nutrient-budgets/nutrient-budgets-tech-paper-02-17.pdf
http://www.mfe.govt.nz/publications/water/managing-waterways-jul01/case-study-13-jul01.pdf
http://www.ballance.co.nz/products/specialist+products/nutrient+budgets
http://www.deernz.org/productivity-improvement-hub/farm-environment/water-soils/land-environment-planning/waterway#.UbKcWfk3CSo
http://www.youtube.com/watch?v=L6AUodAbsiA&feature=plcp (Australia)
http://www.dairynz.co.nz/file/fileid/27244
http://www.side.org.nz/IM_Custom/ContentStore/Assets/8/51/07b888382786db6b4a814c6fe24658b3/Nutrient%20management%20on%20the%20LUDF;%20Nutrient%20budgeting%20for%20efficent%20productoin.pdf
http://www.grassland.org.nz/publications/nzgrassland_publication_682.pdf
http://maxa.maf.govt.nz/mafnet/rural-nz/sustainable-resource-use/resource-management/nutrient-budgets/nutrient-budgets-tech-paper-02-17.pdf
http://www.mfe.govt.nz/publications/water/managing-waterways-jul01/case-study-13-jul01.pdf