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Nutrient Management Workbook 2009. Jon Rausch, Amanda Meddles & Robert Mullen Ohio State University Extension. Objective. Development a nutrient management plan for each field of the farming operation. Focus on those utilizing animal manure. Take Home:

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Nutrient management workbook 2009

Nutrient Management Workbook 2009

Jon Rausch, Amanda Meddles

& Robert Mullen

Ohio State University Extension


Objective
Objective

  • Development a nutrient management plan for each field of the farming operation.

    • Focus on those utilizing animal manure.

      Take Home:

    • General understanding of this Nutrient Management Workbook

    • Steps toward and approved Nutrient Management Plan


Outline
Outline

  • Identify available soil resources.

  • Identify manure nutrients available.

  • Identify the nutrient needs of growing crop.

  • Identify sources of nutrients available for that crop.

  • Allocate and balance available nutrients by field.

  • Estimate nutrient carry-over, if any, and the value of that carry-over.

  • Identify spreadable acres available for manure application.

  • Estimate number of acres needed to recycle manure nutrients generated by your operation.

  • Identify steps toward an approved plan.



Example farm
Example Farm

Throughout this presentation an example is provided based on a farm that is currently operating a 1,000 head swine grow-finish barn. The farm has 200 cropping acres. This farm has a rotation of corn, soybeans and wheat and fertilizes his fields with manure from the swine operation. This is supplemented with commercial fertilizer when necessary. The field used throughout this book as an example is Brown 1 or B1. It is 30 acres and will be planted in corn. The previous crop was soybeans. Examples based on this scenario can be found in different sections throughout the presentation in gray boxes like this one.

Page 1


Soils field data
Soils/Field Data

OSU Fact Sheet: Soil Sampling, Handling & Testing

Field Plan EXAMPLE

A

Field Information

B1

Brown

Corn

160 bu/ac

Soybeans

Silt Loam

30

ac

lb/ac

lb/ac

20

30

250

Meq/100g

ppm

ppm



Yield response NOT likely

Yield response likely

Increasing 



No soil test
No Soil Test

Assumes maintenance level

Page 2


Example farm1
Example Farm

Grow-Finish

13.86

42

30

Winter application see page 17



Manure nutrients
Manure Nutrients

Example

This swine example uses book values, due to a lack of manure test results, from Table 1 Grow- Finish deep pit of 33 lb/1,000 gal of NH3-N, 17 lb/1,000 gal of Organic N (ON), 42 lb/1,000 gal of P2O5 and 30 lb/1,000 gal of K2O which will be applied in September and incorporated within 1 day.

PAN: (17 x .33) + (33 x .25) = 13.86 lb/1,000 gal

P2O5: 42 lb/1,000 gal

K2O: 30 lb/1,000 gal

PAN is Plant Available Nitrogen. This is the amount of Nitrogen available to the crop based on time of application and method of application.

Page 3



Time of year
Time of Year

page 5


Calculating pan example farm
Calculating PAN- Example Farm

33

17

13.86

36.31

25%

8

33%

11.7

Test 1

16% diff.

PAN worksheet top of page 3


Example farm2
Example Farm

Grow-Finish

13.86

42

30

Winter (Frozen & Snow Covered) application see page 17


Example nutrient worksheet
Example Nutrient Worksheet

C

Crop Nutrient Needs

D

Starter Fertilizer Applied

ton/ac

gal/ac

E

Additional Nutrients Needed

F

Manure Application Rate

G

Manure Nutrients Applied

H

Additional Nutrients Applied

I

Crop Nutrient Balance

J

Years to Next Nutrient Application


Example farm3
Example Farm

Example

A dairy farmer expects 160 bu/ac of grain corn in field B1. The previous crop was soybeans. Nutrient recommendations without soil test values are:

PAN: 160 lb/ac P2O5: 60 lb/ac K2O: 65 lb/ac

Page 5



P 2 o 5 recommendation
P silage2O5 Recommendation

Page 6-8


Page 8-10 silage


Example nutrient worksheet1
Example Nutrient Worksheet silage

160 60 65

C

Crop Nutrient Needs

D

Starter Fertilizer Applied

ton/ac

gal/ac

E

Additional Nutrients Needed

F

Manure Application Rate

G

Manure Nutrients Applied

H

Additional Nutrients Applied

I

Crop Nutrient Balance

J

Years to Next Nutrient Application


Example - Liquid Fertilizer (used in this example) silage

5 gal/ac of 10-34-0 are applied at planting. The fertilizer contains 10% PAN, 34% P2O5, and 0% K2O. The application rate is 5 gal/ac x 11.7 lb/gal =

58.5 lb/ac.

PAN: 58.5 lb/ac x 10% = 6

P2O5: 58.5 lb/ac x 34% = 20

K2O: 58.5 lb/ac x 0% = 0

Example - Dry Fertilizer

Diammonium phosphate has a blend of (18-46-0) applied at 150 lb/ac. The fertilizer contains 18% PAN, 46% P2O5 and 0% K2O.

PAN: 150 lb/ac x 18% = 27 lb/ac

P2O5: 150 lb/ac x 46% = 69 lb/ac or 14 lbs/ac

K2O: 150 lb/ac x 0% = 0 lb/ac


Example nutrient worksheet2
Example Nutrient Worksheet silage

160 60 65

-6 -20 -0

C

Crop Nutrient Needs

D

Starter Fertilizer Applied

ton/ac

gal/ac

E

Additional Nutrients Needed

F

Manure Application Rate

G

Manure Nutrients Applied

H

Additional Nutrients Applied

I

Crop Nutrient Balance

J

Years to Next Nutrient Application


Example nutrient worksheet3
Example Nutrient Worksheet silage

160 60 65

-6 -20 -0

154 40 65

C

Crop Nutrient Needs

D

Starter Fertilizer Applied

ton/ac

gal/ac

E

Additional Nutrients Needed

F

Manure Application Rate

G

Manure Nutrients Applied

H

Additional Nutrients Applied

I

Crop Nutrient Balance

J

Years to Next Nutrient Application


Example silage

The swine farmer decides to base his application rate on the nitrogen need of the corn crop. Field B1 needs 154 lb/ac of PAN (from E: Additional Nutrients Needed) and the manure has a value of 13.86 lb/1000 gal or 0.01386 lb/gal .

PAN Application Rate = 154 lb/ac / 0.01386 lb/gal = 11,111 gal/ac

If he chose to use P2O5: 40 lb/ac / 0.042 lb/gal = 952 gal/ac

If he chose to use K2O: 65 lb/ac / 0.030 lb/gal = 2,167 gal/ac

Page 12

See also: NRCS-633, Table 4, page 13




Manure Nutrients Applied silage

Example

Manure Nutrient Values for field B1 are 13.86 lb/1000 gal of PAN, 42 lb/1000 gal P2O5, and 30 lb/1000 of K2O. Dividing these by 1000 to achieve lb/gal or a PAN of 0.01386 lb/gal, P2O5 of 0.042 lb/gal, and K2O of 0.030 lb/gal. The application rate calculated previously is 11,111 gal/ac but 7,000 gal/ac was applied to monitor the rate of P2O5.

PAN: 0.01386 lb/gal x 7,000 gal/ac = 97 lb/ac

P2O5: 0.042 lb/gal x 7,000 gal/ac = 294 lb/ac

K2O: 0.030 lb/gal x 7,000 gal/ac = 210 lb/ac

Page 13


Example nutrient worksheet4
Example Nutrient Worksheet silage

160 60 65

-6 -20 -0

154 40 65

7,000

-97 -294 -210

C

Crop Nutrient Needs

D

Starter Fertilizer Applied

ton/ac

gal/ac

E

Additional Nutrients Needed

F

Manure Application Rate

G

Manure Nutrients Applied

H

Additional Nutrients Applied

I

Crop Nutrient Balance

J

Years to Next Nutrient Application


Additional nutrients
Additional Nutrients silage

  • PSNT: Pre Side-dress Nitrogen Test

  • Applicable for fields with history of manure application

  • Designed to capture ON cycling

  • Sample just prior to side-dress N application

  • Indicator of NO3-N + NH4-N available

  • 30 ppm sufficient PAN, low probability of yield response with additional N

  • 0 – 30 ppm, higher probability of yield response with additional N

Page 13


Example nutrient worksheet5
Example Nutrient Worksheet silage

160 60 65

-6 -20 -0

154 40 65

7,000

-97 -294 -210

0 0 0

C

Crop Nutrient Needs

D

Starter Fertilizer Applied

ton/ac

gal/ac

E

Additional Nutrients Needed

F

Manure Application Rate

G

Manure Nutrients Applied

H

Additional Nutrients Applied

I

Crop Nutrient Balance

J

Years to Next Nutrient Application


Example nutrient worksheet6
Example Nutrient Worksheet silage

160 60 65

-6 -20 -0

154 40 65

7,000

-97 -294 -210

0 0 0

57 -254 -145

C

Crop Nutrient Needs

D

Starter Fertilizer Applied

ton/ac

gal/ac

E

Additional Nutrients Needed

F

Manure Application Rate

G

Manure Nutrients Applied

H

Additional Nutrients Applied

I

Crop Nutrient Balance

J

Years to Next Nutrient Application


Nutrient Worksheet silage

Example:

Remaining Nutrients for P2O5: 254 / 60 = 4.2

Remaining Nutrients for K2O: 145 / 65 = 2.2

Page 14


Nutrient carry over
Nutrient Carry-over silage

  • Apply based on N needs of crop when applicable and P for rotation.

  • 4.2 year carry-over means the need for more P is not likely for 3-4 years, but dependant upon crop rotation and soil test level.


Example nutrient worksheet7
Example Nutrient Worksheet silage

160 60 65

-6 -20 -0

154 40 65

7,000

-97 -294 -210

0 0 0

57 -254 -145

4.2 2.2

C

Crop Nutrient Needs

D

Starter Fertilizer Applied

ton/ac

gal/ac

E

Additional Nutrients Needed

F

Manure Application Rate

G

Manure Nutrients Applied

H

Additional Nutrients Applied

I

Crop Nutrient Balance

J

Years to Next Nutrient Application


Nutrient Worksheet silage

L

Value of Excess Nutrients Applied

K

M

Spreadable Acreage (field sketch on back)

Manure Storage Management

Volume Applied =

Volume Remaining =



Common set backs
Common Set-backs silage

Page 15


Nutrient Worksheet silage

L

Value of Excess Nutrients Applied

28.9

K

M

Spreadable Acreage (field sketch on back)

Manure Storage Management

Volume Applied =

Volume Remaining =


Example silage

I: Crop Nutrient Balance shows a negative number for P2O5 and K2O which means there is an over application of those nutrients. There is an excess of 212 lb/ac of P2O5 and 79 lb/ac of K2O. The current market prices for fertilizer are:

N= $0.89/lb P2O5= $1.35/lb K2O= $1.10/lb

P2O5: 254 lb/ac x $1.35/lb x 28.9 ac = $9,909.81

K2O: 145 lb/ac x $1.10/lb x 28.9 ac = $4,609.55

Total dollars in excess nutrients applied to field B1 equals $14,519.36

$2,716

$2,724

$5,440

Fertilizer value used June ‘09:

Urea = $420/ton = $0.46/lb N

DAP $500/ton = $0.37/lb P2O5

Potash $770/ton = $0.65/lb K2O

Page 18


Nutrient Worksheet silage

L

Value of Excess Nutrients Applied

28.9

$14,519.36 $5,440

K

M

Spreadable Acreage (field sketch on back)

Manure Storage Management

Volume Applied =

Volume Remaining =


Example silage

A farmer has 1,000 head in his grow-finish barn excreting 1.2 gallons of manure/hog/day.

1,000 hogs x 1.2 gal/day x 365 days = 438,000 gal/yr

This example assumes 365 day/year one-time clean out. You will need to fine-tune this to accurately reflect your situation.

Page 19


Page 20 silage


Manure production
Manure Production silage

Grow-finish

1.2 lb/day

1,000

365

438,000 gal/yr

438,000 gal

Does not include bedding or other additions to storage


Total nutrients available
Total Nutrients Available silage

  • 438,000 gal available

    • = $ 15,489 (PAN, P2O5, K2O)

  • Total PAN = 438 * 13.86 = 3,071 lb

    • 3,071 lb / 160 lb/ac = 19 ac

    • 3,071 lb * $0.46/lb = $141

  • Total P2O5= 438 * 42 = 18,396 lb

    • 18,396 lb/ 60 lb/ac = 306 ac

    • 18,396 lb * $0.37/lb =$6,807

  • Total K2O = 438 * 30 = 13,140 lb

    • 13,140 lb / 65 lb/ac = 202 ac

    • 13,140 lb * $0.65/lb = $8,541


Manure application records
Manure Application Records silage

  • Field record book

    • Emergency contact information

    • Spill response information

    • Equipment information

    • Detailed ‘day-of-application’ information

    • Winter application guidelines


Break
Break silage

  • Pick up pencil + calculator


Corn silage example
Corn Silage Example silage

  • Change planned crop to Corn Silage (26 T/ac) following Grain Corn (160 bu/ac)

  • Application (April-June) with direct inject/incorporate.



Corn silage 26 t ac
Corn Silage (26 T/ac) silage

Page 8


Corn Silage (26 T/ac) silage

Page 10


Time of year1
Time of Year silage

page 5


Calculating pan example farm1
Calculating PAN- Example Farm silage

April/June

33

75%

17

33%

30.36

PAN worksheet top of page 3


Heritage lane farms
Heritage Lane Farms silage

Grow-finish

30.36

42

30


Heritage lane farms1
Heritage Lane Farms silage

190

C

Crop Nutrient Needs

230

85

-6

0

-20

E

Additional Nutrients Needed

184

230

65

F

Manure Application Rate

ton/ac

gal/ac

7,000

G

Manure Nutrients Applied

-213

-294

-210

H

Additional Nutrients Applied

0

0

0

I

Crop Nutrient Balance*

-29

-229

20

2.7

0

D

Starter Fertilizer Applied

J

Years to Next Nutrient Application


Manure value change
Manure Value Change silage

  • What is the per acre change in manure nutrient value when the application period changes from Sept-Oct to April-June?

  • Only PAN changed.

    • 13.86 lb/1,000 gal (Sept-Oct)

    • 30.36 lb/1,000 gal (April-June)

  • 30.36 – 13.86 = 16.5 lb/1,000 gal

  • Price of N = $0.65/unit of N

    • 16.5 units * $0.65 = $10.73/1,000 gal

    • $53.65 - $75.11 / acre (5 - 7k gal/ac)


Summary
Summary silage

  • Balanced nutrient inputs to match crop nutrient needs + soil resources(?)

    • Soil test is necessary for full utilization of nutrient inputs.

  • Application of nutrients beyond crop needs and soil carrying capacity increases risk of nutrient moving off-site.

    • Economic loss ($$$)

    • When, where, how and how much are important questions to ask.


Summary1
Summary silage

  • Nutrient sampling/testing is necessary to “fine-tune” a nutrient management program.

    • Testing provides you a tool to make an “educated guess.”

  • Nutrient management workbook used as a tool to:

    • Verify current nutrient management practices.

    • Identify more efficiently uses of on-farm nutrients.

    • others


Questions
Questions silage

Amanda Meddles, [email protected], 614-292-6625

Jon Rausch,

[email protected], 614-292-4504

http://oema.osu.edu


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