Case 1A - Stocking Rate (15 pts): Step 1 - Calculate Total Usable Forage Supply: Spencer Smith has a ranch in the southern mixed prairie that is 1,500 acres. A total of 75% of the ranch is covered by a sandy loam range site that produces 1,500 lbs./acre/year. The other 25% is a shallow uplands site that produces 800 Ib/acre/year. How much total forage does Spencer produces on his ranch? However Spencer cannot use all of the forage he produces. Why? 1) 2) Scientists recommend that Spencer remove only 40-50% of her total forage each year to maintain good range condition. If Spencer decides to use 40% of his total forage, how much usable forage does he have? Step 2 = Adjust for accessibility (terrain or distance to water). Spencer's ranch has limited accessability due to topographical boundaries; therefore, forage use needs to be decreased an additional 10%. How much total forage is now available? Step 3 = Calculate Forage Demand: Spencer has several species that he manages on his ranch and all animals graze year-round in the range. He has 4 horses that weigh about 1200 lbs. each. He also wants to allow enough forage for 15 pronghorn antelope that weigh about 110 pounds. The rest of his forage he wants to use for mature ewes that weigh about 180 lbs. each. How much forage will his horses need for 1 year? How much forage will the 15 pronghorn eat on his ranch? How much forage will 1 ewe eat per year? Step 4 - Calculating Stocking Rate: We need to determine how many ewes Spencer should put on his ranch. From step 1 and 2 we calculated that Spencer had lbs. of forage to use. Reduce this amount by the amount need for horses: Reduce this amount for the pronghorn: How many ewes should he stock per year if each sheep consumes 1,642.5 lbs./year? Ibs forage + Ibs/ewe = ewes/year What if Spencer decides to stock his ranch with stocker steers instead of sheep? Suppose Spencer wants to buy steers weighing 600 lbs April 1st and then sell them June 30 when they weigh about 800 lbs. . How much will each steer eat per day (average for the whole period)? . How much will each steer need for the 3 month grazing period? Case 1A - Stocking Rate (15 pts): Step 1 - Calculate Total Usable Forage Supply: Spencer Smith has a ranch in the southern mixed prairie that is 1,500 acres. A total of 75% of the ranch is covered by a sandy loam range site that produces 1,500 lbs./acre/year. The other 25% is a shallow uplands site that produces 800 Ib/acre/year. How much total forage does Spencer produces on his ranch? However Spencer cannot use all of the forage he produces. Why? 1) 2) Scientists recommend that Spencer remove only 40-50% of her total forage each year to maintain good range condition. If Spencer decides to use 40% of his total forage, how much usable forage does he have? Step 2 = Adjust for accessibility (terrain or distance to water). Spencer's ranch has limited accessability due to topographical boundaries; therefore, forage use needs to be decreased an additional 10%. How much total forage is now available? Step 3 = Calculate Forage Demand: Spencer has several species that he manages on his ranch and all animals graze year-round in the range. He has 4 horses that weigh about 1200 lbs. each. He also wants to allow enough forage for 15 pronghorn antelope that weigh about 110 pounds. The rest of his forage he wants to use for mature ewes that weigh about 180 lbs. each. How much forage will his horses need for 1 year? How much forage will the 15 pronghorn eat on his ranch? How much forage will 1 ewe eat per year? Step 4 - Calculating Stocking Rate: We need to determine how many ewes Spencer should put on his ranch. From step 1 and 2 we calculated that Spencer had lbs. of forage to use. Reduce this amount by the amount need for horses: Reduce this amount for the pronghorn: How many ewes should he stock per year if each sheep consumes 1,642.5 lbs./year? Ibs forage + Ibs/ewe = ewes/year What if Spencer decides to stock his ranch with stocker steers instead of sheep? Suppose Spencer wants to buy steers weighing 600 lbs April 1st and then sell them June 30 when they weigh about 800 lbs. . How much will each steer eat per day (average for the whole period)? . How much will each steer need for the 3 month grazing period