A local farmer is fertilizing his 120 acres wheat field. Soil tests have shown that to reach his yield goals he needs to apply 136 pounds of N. Two different fertilizer companies have made him offers. Fill out the chart below and determine which fertilizer would be the most economic for him to use.Fertilizer A Company

40-15-3 Fertilizer
$310 per tonFertilizer B Company

50-10-5 Fertilizer
$450 per ton
(10 points each)

Fertilizer A

Total pounds of fertilizer used: __________________
Amount of fertilizer used/acre: __________________
Total cost of fertilizer:__________________
Cost/acre of fertilizer: __________________
Pounds of Phosphorus applied __________________
Pounds of Potassium applied __________________
Cost per pound of Nitrogen __________________

Fertilizer B (10 points each)

Total pounds of fertilizer used: __________________
Amount of fertilizer used/acre: __________________
Total cost of fertilizer: __________________
Cost/acre of fertilizer: __________________
Pounds of Phosphorus applied __________________
Pounds of Potassium applied __________________
Cost per pound of Nitrogen __________________

Which fertilizer company would be the most economical to use? Beside each of the following, write the primary purpose for needing that nutrient.

Nitrogen

Phosphorus

Potassium