Nutrient Management Workbook
Guide to Completing the Workbook – Sections A to S
The workbook is a tool that simulates the NMAN Software.
This workbook is organized in sections, from A to S, with each line
of the Worksheet corresponding to the detailed descriptions found
here help you develop the required information.
Agronomic Nutrient Balance (Section D to Section I)
Section H – Ontario Crop Production
Requirements
Using soil test results, obtain production requirements
from OMAF Publication 811, 360 or 363. Recommendations for some common
field crops are displayed in the tables below. If a soil test is unavailable,
assume that the P test is 101 mg/l, and the K test is 251 mg/l. These
values will give a zero recommendation for phosphorus and/or potash.
O. Reg 267/03 requires soil samples for all but initial required regulated
NMP.
Table 8: P2O5 and K2O
Recommendations - Metric
|
Soil Test
|
P2O5 Recommendations
(kg/ha)
|
|
(mg/L)
|
Corn
|
Beans
|
Wheat
|
Canola
|
Alfalfa
|
|
0 - 3
|
110
|
81
|
71
|
71
|
180
|
|
4 - 5
|
100
|
61
|
61
|
61
|
120
|
|
6 - 7
|
90
|
50
|
50
|
50
|
90
|
|
8 - 9
|
69
|
40
|
30
|
30
|
61
|
|
10 - 12
|
50
|
30
|
20
|
20
|
30
|
|
13 - 15
|
20
|
20
|
20
|
20
|
20
|
|
16 - 20
|
20
|
0
|
20
|
0
|
0
|
|
21 - 25
|
20
|
0
|
0
|
0
|
0
|
|
26 - 30
|
20
|
0
|
0
|
0
|
0
|
|
> 31
|
0
|
0
|
0
|
0
|
0
|
|
Soil Test
|
K2O Recommendations(kg/ha)
|
|
(mg/L)
|
Corn
|
Beans
|
Wheat
|
Canola
|
Alfalfa
|
|
0 - 15
|
170
|
121
|
50
|
71
|
480
|
|
16 - 30
|
160
|
111
|
40
|
50
|
400
|
|
31 - 45
|
140
|
91
|
30
|
40
|
319
|
|
46 - 60
|
110
|
81
|
20
|
30
|
270
|
|
61 - 80
|
80
|
61
|
20
|
20
|
200
|
|
81 - 100
|
50
|
40
|
20
|
20
|
130
|
|
101 - 120
|
30
|
30
|
20
|
0
|
69
|
|
121 - 150
|
0
|
0
|
0
|
0
|
20
|
|
> 151
|
0
|
0
|
0
|
0
|
0
|
Source: OMAF Publication 811 Agronomic Guide for Field
Crops
Table 8: P2O5 and K2O
Recommendations - Imperial
|
Soil Test
|
P2O5 Recommendations
(lb/ac)
|
|
(ppm)
|
Corn
|
Beans
|
Wheat
|
Canola
|
Alfalfa
|
|
0 - 3
|
98
|
72
|
63
|
63
|
161
|
|
4 - 5
|
89
|
54
|
54
|
54
|
107
|
|
6 - 7
|
80
|
45
|
45
|
45
|
80
|
|
8 - 9
|
62
|
36
|
27
|
27
|
54
|
|
10 - 12
|
45
|
27
|
18
|
18
|
27
|
|
13 - 15
|
18
|
18
|
18
|
18
|
18
|
|
16 - 20
|
18
|
0
|
18
|
0
|
0
|
|
21 - 25
|
18
|
0
|
0
|
0
|
0
|
|
26 - 30
|
18
|
0
|
0
|
0
|
0
|
|
> 31
|
0
|
0
|
0
|
0
|
0
|
|
Soil Test
|
K2O Recommendations (lb/ac)
|
|
(ppm)
|
Corn
|
Beans
|
Wheat
|
Canola
|
Alfalfa
|
|
0 - 15
|
152
|
108
|
45
|
63
|
428
|
|
16 - 30
|
143
|
99
|
36
|
45
|
357
|
|
31 - 45
|
125
|
81
|
27
|
36
|
285
|
|
46 - 60
|
98
|
72
|
18
|
27
|
241
|
|
61 - 80
|
71
|
54
|
18
|
18
|
178
|
|
81 - 100
|
45
|
36
|
18
|
18
|
116
|
|
101 - 120
|
27
|
27
|
18
|
0
|
62
|
|
121 - 150
|
0
|
0
|
0
|
0
|
18
|
|
> 151
|
0
|
0
|
0
|
0
|
0
|
| Top of Page |
Table 9. Nitrogen Recommendations for Common Field Crops
Nitrogen Recommendations - Corn
|
Location
|
Expected Yield |
6
tonne/
ha |
100
bu/ac |
8
tonne/
ha |
130
bu/ac |
9
tonne/
ha |
150
bu/ac |
10
tonne/
ha |
160
bu/ac |
11
tonne/
ha |
175
bu/ac |
|
Eastern Ontario
|
95 kg/ha |
82 lb/ac |
135 kg/ha |
120 lb/ac |
168 kg/ha |
150 lb/ac |
179 kg/ha |
160 lb/ac |
202 kg/ha |
180 lb/ac |
|
Western/Central (<2700 chu)
|
106 kg/ha |
95 lb/ac |
123 kg/ha |
110 lb/ac |
135 kg/ha |
120 lb/ac |
135 kg/ha |
120 lb/ac |
140 kg/ha |
125 lb/ac |
|
Midwestern Ontario
(2700-2900 chu)
|
140 kg/ha |
125 lb/ac |
157 kg/ha |
140 lb/ac |
168 kg/ha |
150 lb/ac |
168 kg/ha |
150 lb/ac |
179 kg/ha |
160 lb/ac |
|
Southwestern Ontario
(>2900 chu)
|
168 kg/ha |
150 lb/ac |
185 kg/ha |
165 lb/ac |
196 kg/ha |
175 lb/ac |
202 kg/ha |
180 lb/ac |
213 kg/ha |
190 lb/ac |
For sidedress applications in SW Ontario reduce N recommendations by
15%
Nitrogen Recommendations - Cereals and Canola
| Crop |
Expected Yield |
2.4
tonne/ha |
35
bu/ac |
4.0
tonne/ha |
60
bu/ac |
4.7
tonne/ha |
70
bu/ac
|
5.4
tonne/ha |
80
bu/ac |
|
Winter Wheat (soft white/red)
|
---
|
---
|
84 kg/ha
|
75 lb/ac
|
95 kg/ha
|
85 lb/ac
|
112 kg/ha
|
100 lb/ac
|
|
Winter Wheat (hard red)
|
---
|
---
|
123 kg/ha
|
110 lb/ac
|
135 kg/ha
|
120 lb/ac
|
151 kg/ha
|
135 lb/ac
|
|
Spring Wheat, Barley (<2600 chu)
|
71 kg/ha
|
63 lb/ac
|
71 kg/ha
|
63 lb/ac
|
71 kg/ha
|
63 lb/ac
|
71 kg/ha
|
63 lb/ac
|
|
Barley, Mixed Grain (>2600 chu)
|
45 kg/ha
|
40 lb/ac
|
45 kg/ha
|
40 lb/ac
|
45 kg/ha
|
40 lb/ac
|
45 kg/ha
|
40 lb/ac
|
|
Winter Barley, Winter Rye*
|
91 kg/ha
|
81 lb/ac
|
91 kg/ha
|
81 lb/ac
|
91 kg/ha
|
81 lb/ac
|
91 kg/ha
|
81 lb/ac
|
|
Oats, Spring Rye
(<2600 chu)
|
56 kg/ha
|
50 lb/ac
|
56 kg/ha
|
50 lb/ac
|
56 kg/ha
|
50 lb/ac
|
56 kg/ha
|
50 lb/ac
|
|
Oats, Spring Rye
(>2600 chu)
|
36 kg/ha
|
32 lb/ac
|
36 kg/ha
|
32 lb/ac
|
36 kg/ha
|
32 lb/ac
|
36 kg/ha
|
32 lb/ac
|
|
Spring Canola
(<2300 chu)
|
135 kg/ha
|
120 lb/ac
|
135 kg/ha
|
120 lb/ac
|
135 kg/ha
|
120 lb/ac
|
---
|
---
|
|
Spring Canola
(>2300 chu)
|
101 kg/ha
|
90 lb/ac
|
101 kg/ha
|
90 lb/ac
|
101 kg/ha
|
90 lb/ac
|
---
|
---
|
|
Winter Canola
(at planting) -
|
39 kg/ha
|
35 lb/ac |
39 kg/ha
|
35 lb/ac |
39 kg/ha
|
35 lb/ac
|
---
|
---
|
|
Winter Canola
(spring) -
|
163 kg/ha
|
145 lb/ac |
202 kg/ha
|
180 lb/ac |
213 kg/ha
|
190 lb/ac
|
---
|
---
|
* N rec for Winter Rye not in rotation with Tobacco
Nitrogen Recommendations - Forages
| Crop |
Forage Value $/tonne ($/ton) |
$33/
tonne |
$30/
ton |
$55/
tonne |
$50/
ton |
$77/
tonne |
$70/
ton |
|
Hay or Pasture
(>1/2 legumes)
|
0
|
0
|
0
|
0
|
0
|
0
|
|
Hay or Pasture
(1/3 to 1/2 legume)
|
67 tonne/ha
|
60 bu/ac
|
67 tonne/ha
|
60 bu/ac
|
67 tonne/ha
|
60 bu/ac
|
|
Grass Hay*
(less than 1/3 legume)
|
56 tonne/ha
|
50 bu/ac
|
95 tonne/ha
|
85 bu/ac
|
112 tonne/ha
|
100 bu/ac
|
|
New legume seeding
(with a nurse crop)
|
16 tonne/ha
|
14 bu/ac
|
16 tonne/ha
|
14 bu/ac
|
16 tonne/ha
|
14 bu/ac
|
|
New legume seeding
(without a nurse crop)
|
0
|
0
|
0
|
0
|
0
|
0
|
*Assumes a 2 cut system - (one cut decrease by 20%; three cuts increase
by 20%)
Nitrogen Recommendations - Beans
| Crop |
Expected Yield |
| 33 tonne/ha |
30 bu/ac |
|
Soybeans
|
0
|
0
|
|
Dry Edible Beans
|
45 to 67 kg/ha
|
40 to 60 lb/ac
|
Source: Agronomy Guide for Field Crops OMAF Publication 811
Example:
A field located in Eastern Ontario has a P soil test of 35 mg/L (or
ppm) and K soil test of 79 mg/L (or ppm). The field is to be planted
to corn and it's expected to yield 135 bu/ac. The N requirement is
obtained from the top chart by estimating the yield between 130 bu/ac
and 150 bu/ac. The N recommendation is approximately 128 lb/ac. The
phosphorus recommendation will be zero, and the potash recommendation
will be 71 pounds of K20 per acre.
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