The type of barn on the farmstead frequently determines how manure is handled on a dairy form. Dairy-cow manures containing a fair amount of bedding, usually around 20% dry matter or higher, is spread as a solid. Liquid Manure is usually in the range from 2% - 12% dry matter ( 88% or more water ), with the lower dry matter if water is flushed from alleys and passed through a liquid-solid separator or large amounts of runoff enter the storage lagoon. Manures with characteristics between solid and liquid, with dry matter between 12% and 20%, are usually referred to as semi-soild.
Composting Manures is becoming an increasingly popular option for farmers, although it is easier to compost manure that has been handled as a solid, it take a lot of bedding to get fresh manure to 20% solid level. Some farmers are separating the Solid and Liquid Manures and then irrigating with the liquid and composting the solids.
Description | Dairy Cow | Beef Cow | Chicken | Hog |
Dry Matter Content ( % ) | ||||
Solid | 26 | 23 | 55 | 9 |
Liquid | 7 | 8 | 17 | 6 |
Top Nutrient Content ( Appx.) | ||||
Pounds / ton | 10 | 14 | 25 | 10 |
Pounds /1000 gallons | 25 | 39 | 70 | 28 |
Pounds / ton | 6 | 9 | 25 | 6 |
Pounds /1000 gallons | 9 | 25 | 70 | 9 |
Pounds / ton | 7 | 11 | 12 | 9 |
Pounds /1000 gallons | 20 | 31 | 33 | 34 |
Approximate amounts of solid and liquid manure to supply 1000 pounds N for a given species of animal | ||||
Solid Manure ( tons ) | 10 | 7 | 4 | 10 |
Liquid Manure ( gallons ) | 4000 | 2500 | 1500 | 3600 |
A high percentage of the nutrients in feed passes right through animals and ends up in their manure. Depending upon the ration and animal type, over 70% of the nitrogen, 60% Phosphorous, and 80% of the potassium fed may pass through animal as manure.
The values given in the above table should be viewed with caution because the characteristics of manures from even the same type of animal vary considerably from one farm to another. Difference in feeds, mineral supplements, bedding materials, and storage systems make manure analyses quite variable.
Poultry manures are significantly high in Nitrogen and Phosphorous than the other manure types. This is due to high percentage of dry matter in poultry manure which is responsible for the higher analyses of certain nutrients when expressed on a wet ton basis.
See also :
Types of Animal Manures For Increasing Organic Matter
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