Grain Sorghum (Code #006)
Soil Test RatingPotassium

Low K

Coast: 0-60 lbs/A

Pied: 0-100 lbs/A

Medium K

Coast: 61-150 lbs/A

Pied: 101-200 lbs/A

High K

Coast: 151-250 lbs/A

Pied: 201-350 lbs/A

Very High K

Coast: 250+ lbs/A

Pied: 350+ lbs/A

PhosphorusRecommended Pounds N-P205-K20 per Acre

Low P

Coast: 0-30 lbs/A

Pied: 0-20 lbs/A

80-80-8080-80-6080-80-3080-80-0

Medium P

Coast: 31-60 lbs/A

Pied: 21-40 lbs/A

80-60-8080-60-6080-60-3080-60-0

High P

Coast: 61-100 lbs/A

Pied: 41-75 lbs/A

80-30-8080-30-6080-30-3080-30-0

Very High P

Coast: 100+ lbs/A

Pied: 75+ lbs/A

80-0-8080-0-6080-0-3080-0-0

Coast = Coastal Plain    Pied = Piedmont, Mountain, and Limestone Valley

Recommendations:

Recommended pH:6.0. If the pH is less than 6.0, see Lime Table C.
Nitrogen:80 pounds nitrogen (N) per acre
Magnesium:

If soil test Mg level is low and lime is recommended, use dolomitic limestone; if soil test Mg is low and lime is not recommended, apply 25 pounds of Mg/Acre.

Coastal PlainLow: 0 - 30 lbs/acre Medium: 31 - 60 lbs/acre High: >60 lbs/acre
Piedmont Low: 0 - 60 lbs/acre Medium: 61 - 120 lbs/acre High: >120 lbs/acre

Fact Sheet:

Split the nitrogen (N) application, applying half prior to or at planting and the remainder before the 6th leaf stage.

For projected grain sorghum yields of 100 bushels per acre or higher increase the nitrogen (N) fertilizer rate to 125 pounds nitrogen per acre.

Reduce the nitrogen rate by 20 to 40 pounds per acre following peanuts and soybeans, and by 80 to 100 pounds per acre following alfalfa or a legume winter cover crop that is allowed to bloom.