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Pasture Rental and Use Rates: Animal Units and Profit Sharing

By   /  February 16, 2015  /  Comments Off on Pasture Rental and Use Rates: Animal Units and Profit Sharing

Here’s more math for figuring out how to feed our livestock while making a good living on leased pasture. Even if math isn’t your strong suit, we take it one step at a time so that it’s as easy as it can be.

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AUM Breakdown

The two tables in this article come to us from Oregon State Extension. You can see the complete fact sheet by clicking on this table.

Here’s the third in our series on how to figure Pasture Rental Rates.  If you’ve missed the first two, here they are:

How Much Should You Pay to Lease Pasture?
Pasture Rental Rates: Doing the Math Part 1

Animal Unit Months

Figuring pasture use rates by Animal Unit (AUM) is more common in the western United States where it is the basis for public lands leased to ranchers for their stock. The nice thing about this method is that it makes it easy to plug numbers into a formula to give you a good idea of how many animals you can feed for how long. The formula factors in pasture quality, and the market price of hay so that you can come up with something fair to both parties.

An Animal Unit Month (AUM) is the amount of forage required to sustain a 1,000 pound cow with her calf at her side for 30 days. That works out to about 26.1 pounds per day. Forage requirements for all the other classes of livestock are shown in relationship to that 1,000 pound cow and her calf.

Here’s the formula:

Number of Animal Units x Average Hay Price Out of the Field Per Pon x Pasture Quality Factor = Rate Per Head Per Month

Pasture Quality Factor(Note: This formula works well for irrigated pasture, but may over-estimate non-irrigated, arid range rental rates where there is less forage and very little infrastructure.)

Here’s an example of what the formula looks like using a 1200-pound cow with her calf, during a time when hay is going for $10o per ton, and you’re hoping to rent an excellent grass and legume pasture:

1.20 AU x $100/ton x .20 Quality Factor = $24/AUM

From here the landowner and prospective lease can negotiate price based on expectations for management of the pasture, past experience, water and fence infrastructure and other requirements.

Don’t like that formula?  Here’s another option:

Hay Value Per Ton / 8.5 Rule of Thumb Forage Equivalent x Animal Unit = Rate Per Animal Unit Per Month

Using the same cow-calf pair and hay price, here’s that formula in action:

($100 per ton/8.5) x 1.2 = $14.12 per AUM

This is also just a starting point and depending on the result may point out whether you’ve over- or under-estimated the value of your hay.

Sharing Profit and Risk

If you intend to graze Stocker Cattle, establishing a rental rate based on pounds gained means that the landowner and the lease share the profit if there is one, and the risk if gain isn’t as great as expected. If you’re considering this method, you’ll have to have base values for the cost of gain, the expected gain, how long the animals will graze, and the per animal costs for caring for them through the grazing season.

All of the formulas I found for this method start with a Pasture Charge per Head per Month, also called a Seasonal Cost.  None of them told me where they got that number, but they all started with $10.  So starting with that as my full disclosure, we’ll go through this figuring process.

Pasture Charge Per Head Per Month x Number of Months = Seasonal Cost

$10 x 6 months = $60 per head

We use this as our base and then we divide by the pounds of gain we expect. This will change depending on the kinds of animals you’re running, grazing management, health and parasite load of the livestock and forage quality. This is where the risk sharing comes in. Let’s say that we think our stock will gain 200 pounds each while they’re on pasture.  Now our formula looks like this:

($10 x 6) / 200 pounds = 30¢ per pound of gain.

Thirty cents per pound is our break-even price and if the animals all gain 200 pounds each, that’s what the landowner gets. If the stock gain more, say 240 pounds, here’s what the landowner gets per animal:

240 x .30 = $72 per head

But if the animals only gain 175 lbs each, the landowner gets less money per animal:

175 x .30 = $52.5 per head

CowCalfPairOne More Thing….

Before you run out and make an offer, check out next week’s article on this topic about pasture conditions that may cause you to adjust the rental rate.

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About the author

editor and contributor

Kathy worked with the Bureau of Land Management for 12 years before founding Livestock for Landscapes in 2004. Her twelve years at the agency allowed her to pursue her goal of helping communities find ways to live profitably AND sustainably in their environment. She has been researching and working with livestock as a land management tool for over a decade. When she's not helping farmers, ranchers and land managers on-site, she writes articles, and books, and edits videos to help others turn their livestock into landscape managers.

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