Nutrient Management Workbook Guide to Completing the Workbook - Sections
A to SThe 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 InformationCalculate 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 AnalysisThis
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. Back
to the Nutrient Management Workbook Table of Contents For more information:
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E-mail: nman.omafra@ontario.ca
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