Soil Test Fertilizer Recommendations for Alabama Crops

 

Nutrient Recommendations for

Small Grain or Temporary Winter Grass Pasture

(Oats, Rye, Wheat, Ryegrass)

(Crop Code No. 27)

Phosphorus

Potassium

Very high
High
Medium
Low
Very low

Pounds N-P2O5-K2O per acre

Very high
100-0-0
100-0-0
100-0-60
110-0-100
100-0-120

High
100-0-0
100-0-0
100-0-60
100-0-100
100-0-120

Medium
100-60-0
100-60-0
100-60-60
100-60-100
100-60-120

Low
100-100-0
100-100-0
100-100-60
100-100-100
100-100-120

Very low
100-120-0
100-120-0
100-120-60
100-120-100
100-120-120

 

For more accurate fertilizer recommendations, use the equations below for your soil group:

Fertilizer Recommendation Formula
P2O5
K2O
Soil Group*
Equation**
Soil Group*
Equation**
1 & 2
Y = 120 - 2.42X
1
Y = 120 -1.53X
3
Y = 120 - 3.98X
2
Y = 120 -1.02X
4
Y = 120 -1.69X
3
Y = 120 -0.77X

4
Y = 130 -0.62X
* - Use Soil Group from soil test report, if available.
** - Y = pounds fertilizer P2O5 or K2O per acre required; X = soil test P or K

 

Comments

For small grains and ryegrass planted on fallowed fields in early September for grazing, apply 100 pounds of N at planting and 60 pounds in early spring for grazing or grain. Ryegrass planted alone for grazing should receive no more than 60 pounds of N in the fall and up to 100 pounds N in the early spring.

For grain only, apply 20 pounds N per acre in the fall and 60 to 80 pounds in the spring. The fall N can be eliminated following a good soybean crp or other legume.

K requirement level

1

N rate

100

Lime code no.

1

PK code no.

2

Mg code no.

1

 

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