NUTRIENT RECOMMENDATIONS FOR GRASS
 
     
Soil Test Phosphorus, ppm
  
Soil Test Potassium, ppm
Yield goal
Soil N plus Fertilizer N required 
  
VL
L
M
H
VH
  
VL
L
M
H
VH
   
Bray-1
0-5
6-10
11-15
16-20
21+
            
   
Olsen
0-3
4-7
8-11
12-15
16+
  
0-40
41-80
81-120
121-160
161+
ton/a
lb/acre
  
--------lb P2O5/acre--------
  
--------lb K2O/acre--------
1.0
25
  
40
26
12
0
0
  
69
48
27
10
0
2.0
50
  
40
26
12
0
0
  
69
48
27
10
0
3.0
75
  
40
26
12
0
0
  
69
48
27
10
0
4.0
100
  
40
26
12
0
0
  
69
48
27
10
0
5.0
125
  
40
26
12
0
0
  
69
48
27
10
0
6.0
150
  
40
26
12
0
0
  
69
48
27
10
0
7.0
175
  
40
26
12
0
0
  
69
48
27
10
0
Nitrogen recommendation = 25YG
Bray-1 P recommendation = 45.0 - 2.5STP
Olsen P recommendation = 45.0 - 3.45STP
Potassium recommendation = 80.0 - 0.53STK

Grass Statements:

  1. When alfalfa grass mixture is listed:  If your alfalfa-grass mixture contains at least 1/3 alfalfa, no additional nitrogen should be needed.
  2. Alfalfa and grass when a 0-2 ft. No3-N sample was taken:  The nitrate nitrogen test is of little value for perennial crops unless manure has been applied.
  3. For all new-seeding grass: The above recommendation is for the seeding year and each year thereafter.  For the seeding year, do not apply more than 20 lbs/A of nitrogen.
  4. Established grass when fertilizer is recommended: The above recommendation may be applied for cool season grasses in the late fall or early spring.  for warm season grasses, apply about mid-May.

 

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