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Using the calculations in the handout: determining the grazing capacity of your horse pasture, calculate the grazing capacity in the following situation and answer the questions below. you took multiple clip samples of forage with an 8 foot hoop and determined the average air-dry weight of the forage was: 75 grams you have 20 acres of pasture land that based on previous years, you think you can graze horses on from june 1 – sept 30. (irrigated). How many 1000 lb horses will that support for the entire time?



Answer :

Answer:

Explanation:

Alright, let's calculate the grazing capacity for this situation.

Given information:

Average air-dry weight of forage: 75 grams

Pasture land: 20 acres

Grazing period: June 1 – September 30 (4 months)

Step 1: Convert the average air-dry weight of forage from grams to pounds.

1 gram = 0.035 ounces

75 grams = 75 × 0.035 = 2.625 ounces

2.625 ounces = 2.625 ÷ 16 = 0.164 pounds

Step 2: Calculate the total available forage in the pasture.

Total available forage = Average air-dry weight of forage × Pasture land

Total available forage = 0.164 pounds/ft^2 × 43,560 ft^2/acre × 20 acres

Total available forage = 143,040 pounds

Step 3: Calculate the daily dry matter intake (DMI) for a 1,000 lb horse.

Daily DMI = 2.5% of the horse's body weight

Daily DMI = 0.025 × 1,000 lb = 25 pounds

Step 4: Calculate the grazing capacity in number of 1,000 lb horses.

Grazing capacity = Total available forage / (Daily DMI × Number of grazing days)

Grazing capacity = 143,040 pounds / (25 pounds/day × 122 days)

Grazing capacity = 46.8 or approximately 47 horses

Therefore, the 20-acre pasture can support approximately 47 horses that weigh 1,000 lb each for the entire grazing period of June 1 to September 30.

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