27 Keeping horses & steer. You have 125 acres of rangeland in Humboldt County, C

Question

27 Keeping horses & steer. You have 125 acres of rangeland in Humboldt County, California suitable for grazing. This land has a usable carrying capacity for grazing animals of 1.7 AUM per acre in cach annual cycle of grass reucwal (assuming avcrage rainfall and grass renewal). Your proposed business eut raising steer for boof; they will be stocked for six months. You also have two working horses that you koep ycar-round, necessary helpers for managing the cattle. Assume that for ster, one head horses, one head is 1.4 AU. erprise is is 0.85 AU; and for Given this information, if you keep your horses on this land year-round, how much surplus carrying capacity will be left for your steer operation? (Round auswer to the ncarest 0.1 AUM.) a) 35.1 AUM b) 17.5 AUM c) 152.1 AUM d) 178.9 AUM c) 210.5 AUM Answer: D. Keeping horses & sheep. The sccnario is the same as the previous (problem 27): 125 acres of 28 rangeland where you wish to opcrate a grazing shcop instcad of steer. You are still keeping your two horses on-site ycar round, as in the previous problen, and have calculated how much carrying capacity in AUM will be leftover, which was the answer to tho previous. How many head of sheep can you keep for a six-month grazing scason with the two y horses? Each sheep is equivalent to 0.2 AU. (Round answer to the ncarest 1 head.) a) 149 heac b) 5.96 hcad, rounded to 6 head c) 75 hcad d) 11.9 head, rounded to 12 head c) 298 hcad Answer: A

Explanation / Answer

27. Given:

AUM is the forage required by the animal units present on the farm for one month.

Total annual grazing capacity:1.7*125=212.5AUM

2 Horses if kept year round the AU is 1.4*2=2.8AU

Covert this into AUM by multiplying by 12 months=33.6AUM

Now the surpluspresent for the steer is=212.5- 33.6=178.9AUM

Therefore D is the correct answer.

28. Given:

Calculation: Sheep AUM/head=0.2*12=2.4 AUM

Now the sheep are kept only for 6 months therefore, (178.9/2.4)*2=149 heads

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