Cattle manure nitrogen content?

Question

I was wondering if anyone knew the nitrogen content of cattles manure and why many fertizlers add nirtogen into the manure? Is this b/c you can create more useable fertizler by adding nitrogen rather than having to work with more cow p**p to get essential levels of nitrogen for farming?

Does the nitrogen supplimentation decrease the amount of cattle needed to produce good manure.

If your have sources that would be great or ways i could find info.

sorry about the spelling im in a rush

Answer 1

Below are two links to the info you need, the second giving a table of manures and values of fertilizer. In general, the composted manure is about 2-1-2 for cow. One important statistic is that only about 25% of manure (worldwide) is returned to the field to aid in production of food, mostly for the production of feed. You can ammend manure with chemicals but it really isn't necessary for most appications. Manure, to answer another question, is a byproduct of raising animals. It is also a byproduct of our human lives. We generally do not raise animals for their manure, we just use it because it is there and we will pollute the water if we do not manage it. We would be better served if we produced plant based biomass for fertilizer and leave the animals out of the loop. The allocation of resources to produce foods from animal sources is too high given the enormous consumption of those foods in some countries. Severly reducing animals as food sources would address a huge number of issues that include our health, the health of the environment, and the cost and availability of food to all people. There is more but that is basically it in a nut shell. Animals make a wonderful addition to the farm and greatly increase the quality of all our lives, and theirs where appropriate, but in moderation and in smaller scale. Surely not as we abuse them today in so many cases.

Answer 2

A problem here is that fresh cow manure is often rather watery, so the percentage of nitrogen varies widely based on water content.

We use a number like 0.3% N, but to do that we are not describing both well drained manure, dry manure and pit stored manure with the same statistic.

Our main problem with use of commercial fertilizer nitrogen has to do with the all too readily available quality of the nitrogen in fertilizer. By mixing it into manure so that it is captured in the fibres, we make that fertilizer manure less mobile. It stays where plants will get it as the fibre decomposes.

We can also keep more of the nitrogen locked into the manure by adding superphosphate to the manure shortly after it is generated. This is about the best way to supply phosphate to the soil, since it is not immediately locked up by soil calcium, but also because it does lock up nitrates that would easily leach out and would burn plants.

Adding straw to manure reduces nitrogen content yet retains far more of the nitrogen available to plants. It does this by absorbing both the liquid and adsorbing the nitrogen and phosphorus. But it also makes it more difficult to spread the manure very thinly. Very thin spreading of fresh manure is still needed to avoid plant burning.

We do not like to see manure piled for a long time to rot, because the manure loses so much fertilizer value do to leaching into a small area of ground, or into aquifers. It also loses nitrogen into the air.

Answer 3

usually less than 5% after composting..nitrogen is added to around 12- 15% if its needed  for quicker growth

Answer 4

fresh cow manure contains .29% N, .17 % P, and .35% K

If the urin is saved it will increase the nitrogen content

that will drop a lot if it is rained on and allowed to leach out.  The

I would assume that companeys that add nitrogen to there manure do to increase the consisty of there product.

Answer 5

Manure is an excellent fertilizer containing nitrogen, phosphorus, potassium and other nutrients. It also adds organic matter to the soil which may improve soil structure, aeration, soil moisture-holding capacity, and water infiltration.

Handling can affect the fertilizer value of manure, particularly its nitrogen content. Nitrogen is present in manure in a variety of forms, most of which gradually converts to ammonium and nitrate nitrogen.

Fresh cow manure contains about .5% N .3%P and .5% K

Dried it contains 2% N 1.5 % P and 2.2% K. It is always best to be applied dried or composted manure instead of fresh. Sometimes Nitrogen is supplied to manure when organic fertilizer is not considered necessary and more readily available N is needed. Supplementing N in manure would mean less manure was needed but it is generally not considered necessary. When organic fertilizer is desired manure would never have N added.

http://www.ecochem.com/t_manure_fert.htm...