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.
Section C Manure Nutrient Information
Calculate the available P205 and K20.
(Some labs may already have done these calculations). If a manure
analysis is not available, use the values in Table 3. The Nutrient
Management Act requires manure nutrient testing.
The following conversions may be required:
|
Convert to Metric
% to kg/1000 L multiply by 10
% to kg/tonne multiply by 10
mg/L to % divide by 10,000
|
Convert to Imperial
% to lbs per 1000 gallons multiply by 100
% to lbs per ton multiply by 20
ppm to % divide by 10, 000 |
Available P205:
Percent P________ X 0.92 =________ % available P205
(From Table 3 or Lab Analysis)
x 10 = _______kg/1000
L
OR x 10 = _______kg/tonne
OR x 100 = _______ lb/1000 gal
OR x 20 = _______ lb/ton
(Calculate only the one that you need.)
Available K20:
Percent K________ X 1.08 =________ % available K20 (From
Table 3 or Lab Analysis)
x 10 = ______kg/1000
L
OR x 10 = ______kg/tonne
OR x 100 = _____ lb/1000 gal
OR x 20 = _____ lb/ton
(Calculate only the one that you need.)
Example:
A farmer took a liquid hog manure sample, which came back with
the analysis of 0.3% N, 0.1% P, 0.2% K, and 1000 ppm. NH4-N
(0.1%). He will incorporate the manure within 3 days.
N Availability
depends on additional factors. See Method 1 or 2
P205 0.1 x 0.92 = 0.092%
= 9.2 lb/1000 gal
K20 0.2 x 1.08
= 0.216% = 21.6 lb/1000 gal
Use Method 1 or 2 to calculate available nitrogen. Method
1 should be used where there is no manure analysis available and where
manure is "Late Summer" or "Fall" applied (with
Lab Analysis). Method 2 should be used for "Spring, Pre-plant
or Side-dress" applied manure with Lab analysis.
Method 1: Available Nitrogen (Using Nutrient Averages or for
Fall Applied Manure)
Where manure is being fall applied, use the total percent nitrogen
from the analysis and determine available N (using Table 4). Where
a manure analysis is not available, use the numbers in the typical
analysis chart (Table 3).
Available N:
% Total N (Table 3 or Lab Analysis) ______ x Available N (Table 4)
_______ = ________ %
x 10 = ______kg/1000
L
OR x 10 = ______kg/tonne
OR X 100 = ______ lb/1000 gal
OR X 20 = ______ lb/ton
Table 3: Typical Manure Analysis by Livestock Type
|
Type of Manure
|
% Dry Matter
|
% Total Nitrogen
|
%
Organic
N
|
% P
|
% K
|
|
Liquid Manure
|
|
Beef2
|
6
|
.28
|
.13
|
.08
|
.18
|
|
Dairy outside storage2
|
6
|
.30
|
.14
|
.07
|
.23
|
|
Dairy under barn storage1
|
8
|
.41
|
.20
|
.09
|
.29
|
|
Dairy heifers
|
11
|
.55
|
.30
|
.13
|
.32
|
|
Poultry layers
|
10
|
.74
|
.22
|
.26
|
.30
|
|
Swine- sows / weaners
|
3
|
.35
|
.11
|
.10
|
.15
|
|
Swine finishers
|
5
|
.49
|
.19
|
.16
|
.20
|
|
Swine finishers -wet/dry feeders
|
6.5
|
.58
|
.23
|
.20
|
.24
|
|
Liquid Runoff
|
1
|
.10
|
.04
|
.02
|
.12
|
|
Liquid Biosolids anaerobic
|
4.4
|
.28
|
.19
|
.14
|
0
|
|
Milk-fed Veal
|
1.5
|
.08
|
.24
|
.02
|
.18
|
|
Solid Manure
|
|
Beef
|
25
|
.72
|
.64
|
.25
|
.59
|
|
Dairy
|
20
|
.55
|
.42
|
.16
|
.47
|
|
Poultry layers
|
20
|
1.31
|
.60
|
.60
|
.50
|
|
Poultry broilers
|
> 50
|
2.73
|
2.30
|
1.30
|
1.45
|
|
Sheep
|
30
|
1.06
|
.61
|
.59
|
.70
|
|
Horses
|
50
|
.32
|
.28
|
.26
|
.61
|
Source: NMAN Databank
1 assumes milkhouse wastes are stored with manure
2 assumes some yard runoff
3 Ammonium Nitrogen (%) can be calculated by subtracting
Organic N from Total N.
Table 4: Available Nitrogen (as a Proportion of Total Nitrogen2)
|
Application
Time
|
Incorporated (<24 hours)
|
Not Incorporated3
|
|
Late Summer
|
Early
Fall
|
Late
Fall
|
Pre1
Plant
|
Side-dress
1
|
Late Summer
|
Early
Fall |
Late
Fall
|
Pre-plant1
|
Side-dress
1
|
|
Bare
Soil
|
Residue
|
|
Urea
(commercial N)
|
.1 |
.2 |
.5 |
.95 |
1 |
-- |
.1 |
.4 |
.85 |
.75 |
.85 |
|
Solid
Cattle/Sheep
|
.27 |
.26 |
.30 |
.34 |
.34 |
.26 |
.24 |
.24 |
.23 |
.27 |
.26 |
|
Solid Swine
|
.34 |
.34 |
.34 |
.38 |
.36 |
.34 |
.32 |
.28 |
.27 |
.30 |
.33 |
|
Solid Poultry - Layers
|
.28 |
.35 |
.45 |
.52 |
.65 |
.25 |
.30 |
.35 |
.32 |
.40 |
.48 |
|
Solid Poultry - Pullets
|
.33 |
.37 |
.39 |
.43 |
.48 |
.31 |
.34 |
.33 |
.31 |
.36 |
.41 |
|
Solid Poultry - Broilers
|
.36 |
.39 |
.35 |
.38 |
.37 |
.35 |
.37 |
.32 |
.31 |
.33 |
.36 |
|
Liquid Cattle
|
.29 |
.36 |
.41 |
.44 |
.54 |
.27 |
.31 |
.32 |
.26 |
.34 |
.41 |
|
Liquid Swine
|
.23 |
.33 |
.48 |
.56 |
.70 |
.20 |
.27 |
.35 |
.29 |
.40 |
.50 |
|
Liquid Poultry
|
.26 |
.33 |
.51 |
.62 |
.78 |
.22 |
.26 |
.39 |
.33 |
.44 |
.55 |
|
Liquid
Biosolids
|
.33 |
.37 |
.42 |
.43 |
.48 |
.32 |
.34 |
.36 |
.31 |
.36 |
.40 |
Source: Adapted from Barry, Beauchamp et. al., U of
Guelph 2000
Available N in manure = Total Manure N applied x Available N from
Table 4
1 assumes a spring planted crop; Side-dress refers to application
to a growing crop
2 accounts for ammonia loss to atmosphere and mineralization
of organic N
3 for manure incorporated within 3 days Use: (incorporated
value + non incorporated value) / 2
Late Summer = up to Sept 20, Early Fall = Sept 21 to
Nov 9, Late Fall = Nov 10 to Winter
The NMAN software uses a more detailed method of determining available
nitrogen. For different incorporation periods, NMAN will provide more
precise estimates of available nitrogen.
Where
a cover crop (ie clover, rye, oats or barley) is utilized, and manure
is applied in late Summer or fall, use the "Late Fall" column
in Table 4 to determine the Available Nitrogen for the next crop.
Where
manure is applied in late Summer or early fall (following the harvest
of a crop), on a soil in the Hydrologic Group AA, or A or in late
Summer on a soil in the B Hydrologic Group, without a cover crop,
the Nitrogen Index (Section O) must be completed.
Example:
A farmer has liquid hog manure from a finishing barn. He does
not have wet/dry feeders. He plans to apply the manure in late April
and plans to incorporate his manure within 24 hours. Since a manure
test is not available he uses a typical analysis from Table 3 and
using Table 4, calculates the available N, P205
and K20. He finds his manure to have the following nutrients
available for the next growing season.
Available N: .49 % (Manure Analysis, Table 3) x .56 (Available
N factor) x 100 = 27.4 lb/1000 gal
Method 2: Available Nitrogen for Spring Applied Manure Using
Results from a Lab Analysis
This method gives a more accurate estimate of available Ammonium-N
and Organic-N from spring, pre-plant or in-crop applications of manure
where an analysis is available. Determine the proportion of available
organic and retained ammonium-N using Tables 5 and 6 respectively.
Available Nitrogen Using Available Organic and Ammonium-N portions
(Using Lab Analysis Results):
[( percent N percent NH4-N) x Available Organic N (Table 5)] +
[(percent NH4-N x Retained Ammonium (Table 6))]
[(_________ -________ ) x____________ ] + (___________ x___________
)]
=_____________ x 10 = ______________ kg/1000L
=_____________ x 10 = ______________ kg/tonne
=_____________ x 100 =______________ lb/1000 gal
=_____________ x 20 = _______________ lb/ton
Table 5: Available Organic-N
|
Liquid
|
Liquid & Solid
|
Solid
|
|
Poultry
|
All Other
|
Biosolids
|
Poultry
|
Swine
|
< 50%
D.M |
> 50 % DM*
|
Compost |
|
0.3
|
0.2
|
0.3
|
0.3
|
0.25
|
0.15 |
0.05
|
0.3 |
* DM = dry matter
Table 6: Retained Ammonium-N
|
Incorporation Details
|
Injected
|
Incorporated
|
Not Incorporated
|
|
1 day
|
3 days
|
5 days
|
Bare Soil
|
Residue
|
Standing Crop
|
|
Retention Factor
|
1.00
|
0.75
|
0.65
|
0.55
|
0.34
|
0.50
|
0.66
|
Example:
A farmer took a liquid hog manure sample, which came back with
the analysis of 0.3% N, 0.1% P, 0.2% K, and 1000 ppm NH4-N (0.1%).
He will incorporate the manure within 3 days.
Available N: (0.3 0.1) x 0.2 (available Organic N)+ 0.1 x 0.65
(retained ammonium) = 0.105% x 100 = 10.5 lb/1000 gal.
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|