1. Think Break #3
N lbs/A
Yield
bu/A MP
VMP 30
--- 25 45
0.6 50 75
1.2
105
100
135
125
150
165
200
170
0.1
250
160
-0.1
Fill in the VMP column in the table using $2/bu for the corn price.
What is the profit maximizing N fertilizer rate if the N fertilizer price is $0.2/lb?

2. Think Break #3: Answer
N lbs/A
Yield
bu/A MP
VMP 30
--- 25 45
0.6
1.2 50 75
2.4
105
100
135
125
150
165
200
170
0.1
0.2
250
160
-0.1
-0.2
Fill in the VMP column in the table using $2/bu for the corn price. VMP = p x MP
What is the profit maximizing N fertilizer rate if the N fertilizer price is $0.2/lb?
Where VMP = r = 0.2

3. Think Break #3: Answer