| Yield
Potentials |
bu/acre |
50 |
60 |
70 |
80 |
90 |
| Soil
Test K |
|
lb
K2O per acre |
| ppm
(lb/acre) |
CEC
5 meq/100g |
| 25 (50)1 |
|
115 |
120 |
125 |
130 |
130 |
| 50 (100) |
|
85 |
90 |
95 |
95 |
100 |
| 75 (150) |
|
55 |
60 |
60 |
65 |
70 |
| 88-118
(176-235)2 |
40 |
40 |
45 |
50 |
55 |
| 130
(260) |
|
15 |
15 |
15 |
20 |
20 |
| 140
(280) |
|
0 |
0 |
0 |
0 |
0 |
|
|
|
|
|
|
|
|
CEC
10 meq/100g |
| 25 (50) |
|
150 |
155 |
160 |
160 |
165 |
| 50 (100) |
|
115 |
115 |
120 |
125 |
130 |
| 75 (150) |
|
75 |
80 |
85 |
85 |
90 |
| 100-130
(200-260)2 |
40 |
40 |
45 |
50 |
55 |
| 140
(280) |
|
20 |
20 |
25 |
25 |
25 |
| 150
(300) |
|
0 |
0 |
0 |
0 |
0 |
|
|
|
|
|
|
|
|
CEC
20 meq/100g |
| 50 (100) |
|
190 |
190 |
195 |
200 |
205 |
| 75 (150) |
|
140 |
140 |
145 |
150 |
155 |
| 100
(200) |
|
90 |
90 |
95 |
100 |
105 |
| 125-155
(250-310)2 |
40 |
40 |
45 |
50 |
55 |
| 165
(330) |
|
20 |
20 |
25 |
25 |
25 |
| 175
(350) |
|
0 |
0 |
0 |
0 |
0 |
|
|
|
|
|
|
|
|
CEC
30 meq/100g |
| 75 (150) |
|
225 |
230 |
235 |
235 |
240 |
| 100
(200) |
|
165 |
165 |
170 |
175 |
180 |
| 125
(250) |
|
100 |
105 |
110 |
110 |
115 |
| 150-180
(300-360)2 |
40 |
40 |
45 |
50 |
55 |
| 190
(380) |
|
20 |
20 |
25 |
25 |
30 |
| 200
(400) |
|
0 |
0 |
0 |
0 |
0 |
1 Values in parentheses are lb/acre.
2 Maintenance recommendations are given for this soil test range