4R Nutrient Stewardship Calculator

Right source, rate, time, and place optimization scoring.

N rate applied (lbs/acre)

Yield goal (bu/acre)

N factor target (lbs N/bu)

Source match (1-5)

Source-pH match (1-5)

Uses inhibitor/stabilizer (0/1)

Based on soil test (0/1)

Timing score (1-5)

Number of split apps

Placement score (1-5)

Soil texture risk (1-3)

Slope risk (1-3)

Tab to move between fields

4R Total Score (0-100)

62.9

Grade (4=A, 3=B, 2=C, 1=D)

Right Source (0-25)12

Right Rate (0-25)20.9

Right Time (0-25)15

Right Place (0-25)15

Optimal N rate (lbs/acre)220

Excess N applied (lbs/acre)0

Leaching risk (0-100)30

Volatilization risk (0-100)15

Runoff risk (0-100)12

How to Use This Calculator

Enter N Rate Applied (lbs/acre) and Yield Goal (bu/acre) to calculate rate adequacy.
Score Source Match (1–5) and Source-pH Match (1–5) for the fertilizer product you're using.
Indicate whether you Use a nitrification or urease Inhibitor/Stabilizer and whether the rate is Based on a Soil Test.
Set Timing Score (1–5) and Placement Score (1–5) for your application method.
Review the 4R Score and individual right-source, right-rate, right-time, right-place sub-scores to target improvements.

Ad Placeholder