NUTRIENT RECOMMENDATIONS FOR WHEAT AND RYE
 
     
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+
  
0-40
41-80
81-120
121-160
161+
   
Olsen
0-3
4-7
8-11
12-15
16+
            
bu/a
lb/acre-2'
  
--------lb P2O5/acre--------
  
--------lb K2O/acre--------
30
75
  
29
21
13
0
0
  
71
51
30
10
0
40
100
  
39
28
17
10
0
  
95
68
40
13
0
50
125
  
49
35
22
10
0
  
119
85
50
16
0
60
150
  
58
42
26
10
0
  
142
101
61
20
0
70
175
  
68
49
30
12
0
  
166
118
71
23
0
80
200
  
78
56
35
13
0
  
190
135
81
26
0
90 225   85 63 39 15 0   213 152 91 30 0
100 250   97 70 43 17 0   237 169 101 33 0
Nitrogen recommendation = 2.5YG - STN - LC
Bray-1 P recommendation = (1.071 - 0.054 STP)YG
Olsen P recommendation = (1.071 - 0.067 STP)YG
Potassium recommendation = (2.71 - 0.017 STK)YG

Wheat and Rye Statements:

  1. When P2O5 is recommended:  The P2O5 recommendation can be reduced by one third if applying as a starter.  If reduced by one third, soil test levels may be lowered over time.

  2. When very reduced or no-till is used and no deep nitrate test: Because of your very reduced or no tillage system, 30 lb/a of additional nitrogen has been considered in the above N recommendation.

  3. When nitrogen and / or potassium are recommended:  Nitrogen plus K2O fertilizers should be limited to 25 lbs/a when placed in contact with the seed in 6 or 7-inch rows.  Reduce these values correspondingly for wider row width.  Reduce these amounts by half for dry or coarse textured soils.  DO NOT place thiosulfate in direct contact with the seed.
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