NUTRIENT RECOMMENDATIONS FOR BUCKWHEAT
 
     
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--------
24
53
  
29
21
13
0
0
  
39
28
17
10
0
32
70
  
38
28
17
10
0
  
52
37
22
10
0
40
88
  
48
35
21
10
0
  
65
47
28
10
0
48
106
  
57
41
26
10
0
  
78
56
34
11
0
Nitrogen recommendation = 2.2YG - STN - LC
Bray-1 P recommendation = (1.32 - 0.066 STP)YG
Olsen P recommendation = (1.32 - 0.083 STP)YG
Potassium recommendation = (1.86 - 0.0116 STK)YG

Buckwheat 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 nitrogen is recommended: 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 applications in contact with the seed should not exceed 10 lbs/a in six or seven inch rows.  Nitrogen from urea, DAP (18-46-0), and ammonium thiosulfate (21-0-0-26)  should NOT be placed with the seed.

     

     
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