go to this website. Should help.
http://waterwatch.org.au/publications/module4/nitrogen.html
kjehdahl method
The BUN test stands for blood urea nitrogen test. It is used to measure the urea and nitrogen levels in your blood in order to detect issues with the kidneys or liver.
One danger of excessive nitrogen levels in water is eutrophication, which can lead to overgrowth of algae and aquatic plants. This can deplete oxygen levels in the water, harming fish and other aquatic life.
eutrophication
One direct outcome of excess nitrogen is eutrophication, a phenomenon where increased levels of nitrogen in bodies of water lead to excessive algal growth. This can deplete oxygen levels in the water, harming aquatic life and ecosystems.
The solubility of N in water is nil. N is the symbol for nitrogen and this gas does not dissolve in water. However nitrogen as a compound will have different solubility levels.
Excessive nitrogen levels in water bodies can lead to eutrophication, a process where high nutrient levels cause overgrowth of algae and aquatic plants. This can deplete oxygen levels, leading to fish kills and disruption of the ecosystem.
Blood urea nitrogen test (BUN). Urea is a by-product of protein metabolism. This waste product is formed in the liver, then filtered from the blood and excreted in the urine by the kidneys. The BUN test measures the amount of nitrogen.
To test iron levels in water at home, you can use a water testing kit specifically designed for iron. These kits typically include test strips or reagents that change color in the presence of iron. Follow the instructions provided in the kit to accurately measure the iron levels in your water.
Nitrogen is water soluble, the easiest way to do that is to water the plants with straight water for a few times, especially if you are using nutrients. If you are growing outdoors, then flood the plants twice. Over water them a couple of times, and the N should work itself out.
Nitrogen-rich fertilizers can cause an increase in nitrogen levels in run-off water that enters the ocean. This excess nitrogen can fuel the growth of algae, leading to algal blooms. These blooms can disrupt marine ecosystems by reducing oxygen levels in the water, harming marine life, and creating dead zones.
The pond water must contain high nitrogen levels.