1.A vegetable farmer would like to apply broiler manure to his vegetables. He ha

Question

1.A vegetable farmer would like to apply broiler manure to his vegetables. He has found a nearby broiler producer who will sell him broiler manure at a reasonable price. It has an analysis of 52 lb N/ton, 22 lb P/ton, and 36 lb K/ton. (1 ton = 2000 pounds) The recommended fertilization rate for his vegetable crop is 104 lb N/ac-yr, 50 lb P2O5/ac-yr, and 80 lb K2O/ac-yr. For the purpose of working this problem, assume that 100% of the nutrients in the broiler manure will be available in the first year.

A.How many tons/ac-yr of broiler manure should the farmer apply to meet the nitrogen requirement of his vegetable crop?

B.How many tons/ac-yr of broiler manure should the farmer apply to meet the phosphorus (P2O5) requirement of his vegetable crop?

C.If the farmer has 100 acres of vegetables, how many tons of broiler manure should he purchase to meet the nitrogen requirement of his crop? (Ignore the P2O5 and K2O requirements.)

Explanation / Answer

Given that,

Available nitrogen N=52 lb N/ton

Phosphorous P= 22 lb P/ton

   potassium K= 36 lb K/ton

and recommended rate for fertilizer crop are

for N=104 lb N/ac-yr

P2O5= 50 lb P2O5/ac-yr

K20= 80 lb K20/ac-yr

Divide the nutrient recommendations by the pounds of available nutrient per ton of manure

A) for N = 104/52= 2 tons/ac-yr.

B) for P2O5 = 50/22= 2.2 tons/ac-yr.

C) the application rate for nitrogen will be 2 tons/ac-yr.

for 100 acres of vegetables = 200 tons of manure/A.

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