Manure 'Smells Like Money' As Energy Costs Rise
With energy prices driving the cost of agricultural inputs up, nutrient-rich manure is getting another look.
"Calls to Extension offices from people looking for manure and manure compost have increased in recent months," said Tommy Bass, Montana State University Extension livestock environment associate specialist, in a Sept. 10 press release.
Bass said that this shift in perception is good for water quality, too.
"As manure gains value, it is likely to be used more efficiently and effectively. There's a potential for increased revenue for animal feeding operations," he said.
Though MSU Extension and conservation professionals have taught for years that manure can be a valuable asset, it's often written it off as a difficult-to-manage byproduct with cumbersome regulations.
Now, with fertilizer prices hovering at $1,000 per ton, the nitrogen and other nutrients in manure look more gold than brown.
Bass said that a ton of manure contains between $30 to $40 dollars worth of nutrients for the soil, though they're not all available the first year.
"The nutrient content of manure varies for different species and different manure management systems, but it is all valuable," he said.
In addition to specific nutrients, the high organic content of manure and manure compost improves soil quality, and its improved texture improves its water and nutrient holding capacity.
"Attempting to replace all the nitrogen required by a high value wheat crop with manure sources carries a risk of lost production, if all the projected nutrients do not become available to the plant," Bass said. However, he recommends using manure strategically as a nutrient source in conjunction with commercial fertilizer.
The cost of applying manure also needs to be considered, he said, along with other costs such as renting or hiring of spreading equipment, fuel, and an operator's time.
Using manure wisely can offset some commercial fertilizer purchases, while providing additional micronutrients and valuable organic matter to the soil.
As with any fertilizer, application rates should be based on a recent soil test and the particular crop's nutrient needs. An overall nutrient management plan is needed to meet production goals and protect natural resources. For some animal feeding operations such a plan is required as part of their permit.
With recognition of the increased fertilizer value of manure, it is being sold or traded for different services or goods around the country. Historically manure usually was only used or shipped within a few miles of its source. In some cases, it is now economically feasible to ship it increased distances. Manure hauling and brokerage businesses have popped up in which the company will clean out manure storage facilities in exchange for the product; they in turn sell it to another party. Other producers sell and trade with neighbors or build partnerships with commercial nurseries and compost manufacturers. Animal feeding operations with their own forage or crop production can benefit greatly from their onsite manure resources.
Manure is also being used to create energy through digesters that produce biogas capable of generating electricity or heat for farm and ranch buildings. Whether it is used for fertilizer, as an ingredient in compost or for energy production, the value of manure is being recognized for a variety of beneficial uses.