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Nutrient Management Workbook 2009. Jon Rausch, Amanda Meddles & Robert Mullen Ohio State University Extension. MSR Agenda Today. 9:00 Introduction & Welcome Workbook overview 10:30 Break (pick-up pencil + calculator) Work nutrient management example

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nutrient management workbook 2009

Nutrient Management Workbook 2009

Jon Rausch, Amanda Meddles

& Robert Mullen

Ohio State University Extension

msr agenda today
MSR Agenda Today
  • 9:00 Introduction & Welcome Workbook overview
  • 10:30 Break
        • (pick-up pencil + calculator)

Work nutrient management example

Complete field plan for your farm

  • Noon Lunch
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 the book an example is provided based on a farm that is currently milking 100 dairy cows and has 200 acres. This farm has a rotation of corn, soybeans, wheat, and alfalfa and fertilizes his fields with manure from the dairy 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 book 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

slide10

Yield response NOT likely

Yield response likely

Increasing 

no soil test
No Soil Test

Assumes maintenance level

Page 2

example farm13
Example Farm

Winter application see page 17

manure nutrients
Manure Nutrients

Example

This dairy example uses book values, due to a lack of manure test results, from Table 1 of 6 lb/1,000 gal of NH3-N, 25 lb/1,000 gal of Organic N (ON), 15 lb/1,000 gal of P2O5 and 19 lb/1,000 gal of K2O which will be applied in September and incorporated within 1 day.

PAN: (25 x .33) + (6 x .25) = 9.75 lb/1,000 gal

P2O5: 15 lb/1,000 gal

K2O: 19 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

calculating pan example farm
Calculating PAN- Example Farm

Test 1

25%

7.57

33%

5.88

13.46

60% diff.

PAN worksheet top of page 3

example farm19
Example Farm

Winter (Frozen & Snow Covered) application see page 17

example nutrient worksheet
Example Nutrient Worksheet

C

Crop Nutrient Needs

60

65

160

-6 -20 -0

E

Additional Nutrients Needed

154 40 65

F

Manure Application Rate

ton/ac

gal/ac

13,000

G

Manure Nutrients Applied

-127 -195 -247

H

Additional Nutrients Applied

0 0 0

2.6 2.8

I

Crop Nutrient Balance*

27 -155 -182

D

Starter Fertilizer Applied

J

Years to Next Nutrient Application

example farm21
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

example nutrient worksheet25
Example Nutrient Worksheet

C

Crop Nutrient Needs

60

65

160

-6 -20 -0

E

Additional Nutrients Needed

154 40 65

F

Manure Application Rate

ton/ac

gal/ac

13,000

G

Manure Nutrients Applied

-127 -195 -247

H

Additional Nutrients Applied

0 0 0

2.6 2.8

I

Crop Nutrient Balance*

27 -155 -182

D

Starter Fertilizer Applied

J

Years to Next Nutrient Application

slide26

Example - Liquid Fertilizer (used in this example)

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

slide27

Nutrient Worksheet

C

Crop Nutrient Needs

60

65

160

-6 -20 -0

E

Additional Nutrients Needed

154 40 65

F

Manure Application Rate

ton/ac

gal/ac

13,000

G

Manure Nutrients Applied

-127 -195 -247

H

Additional Nutrients Applied

0 0 0

2.6 2.8

I

Crop Nutrient Balance*

27 -155 -182

D

Starter Fertilizer Applied

J

Years to Next Nutrient Application

slide28

Nutrient Worksheet

C

Crop Nutrient Needs

60

65

160

-6 -20 -0

E

Additional Nutrients Needed

154 40 65

F

Manure Application Rate

ton/ac

gal/ac

13,000

G

Manure Nutrients Applied

-127 -195 -247

H

Additional Nutrients Applied

0 0 0

2.6 2.8

I

Crop Nutrient Balance*

27 -155 -182

D

Starter Fertilizer Applied

J

Years to Next Nutrient Application

slide29

Nutrient Worksheet

C

Crop Nutrient Needs

60

65

160

-6 -20 -0

E

Additional Nutrients Needed

154 40 65

F

Manure Application Rate

ton/ac

gal/ac

13,000

G

Manure Nutrients Applied

-127 -195 -247

H

Additional Nutrients Applied

0 0 0

2.6 2.8

I

Crop Nutrient Balance*

27 -155 -182

D

Starter Fertilizer Applied

J

Years to Next Nutrient Application

slide30

Example

The dairy 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 9.75 lb/1000 gal or 0.00975 lb/gal .

PAN Application Rate = 154 lb/ac / 0.00975 lb/gal = 15,794 gal/ac

If he chose to use P2O5: 40 lb/ac / 0.015 lb/gal = 2,700 gal/ac

If he chose to use K2O: 65 lb/ac / 0.019 lb/gal = 3,421 gal/ac

Page 12

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

slide33

Nutrient Worksheet

C

Crop Nutrient Needs

60

65

160

-6 -20 -0

E

Additional Nutrients Needed

154 40 65

F

Manure Application Rate

ton/ac

gal/ac

13,000

G

Manure Nutrients Applied

-127 -195 -247

H

Additional Nutrients Applied

0 0 0

2.6 2.8

I

Crop Nutrient Balance*

27 -155 -182

D

Starter Fertilizer Applied

J

Years to Next Nutrient Application

slide34

Manure Nutrients Applied

Example

Manure Nutrient Values for field B1 are 11.25 lb/1000 gal of PAN, 15 lb/1000 gal P2O5, and 19 lb/1000 of K2O. Dividing these by 1000 to achieve lb/gal or a PAN of 0.01125 lb/gal, P2O5 of 0.015 lb/gal, and K2O of 0.019 lb/gal. The application rate calculated previously is 15,794 gal/ac but 13,000 gal/ac was applied.

PAN: 0.00975 lb/gal x 13,000 gal/ac = 127 lb/ac

P2O5: 0.015 lb/gal x 13,000 gal/ac = 195 lb/ac

K2O: 0.019 lb/gal x 13,000 gal/ac = 247 lb/ac

Page 13

slide35

Nutrient Worksheet

C

Crop Nutrient Needs

60

65

160

-6 -20 -0

E

Additional Nutrients Needed

154 40 65

F

Manure Application Rate

ton/ac

gal/ac

13,000

G

Manure Nutrients Applied

-127 -195 -247

H

Additional Nutrients Applied

0 0 0

2.6 2.8

I

Crop Nutrient Balance*

27 -155 -182

D

Starter Fertilizer Applied

J

Years to Next Nutrient Application

slide36

Nutrient Worksheet

C

Crop Nutrient Needs

60

65

160

-6 -20 -0

E

Additional Nutrients Needed

154 40 65

F

Manure Application Rate

ton/ac

gal/ac

13,000

G

Manure Nutrients Applied

-127 -195 -247

H

Additional Nutrients Applied

0 0 0

2.6 2.8

I

Crop Nutrient Balance*

27 -155 -182

D

Starter Fertilizer Applied

J

Years to Next Nutrient Application

additional nutrients
Additional Nutrients
  • 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

slide38

Nutrient Worksheet

C

Crop Nutrient Needs

60

65

160

-6 -20 -0

E

Additional Nutrients Needed

154 40 65

F

Manure Application Rate

ton/ac

gal/ac

13,000

G

Manure Nutrients Applied

-127 -195 -247

H

Additional Nutrients Applied

0 0 0

2.6 2.8

I

Crop Nutrient Balance*

27 -155 -182

D

Starter Fertilizer Applied

J

Years to Next Nutrient Application

slide39

Nutrient Worksheet

C

Crop Nutrient Needs

60

65

160

-6 -20 -0

E

Additional Nutrients Needed

154 40 65

F

Manure Application Rate

ton/ac

gal/ac

13,000

G

Manure Nutrients Applied

-127 -195 -247

H

Additional Nutrients Applied

0 0 0

2.6 2.8

I

Crop Nutrient Balance*

27 -155 -182

D

Starter Fertilizer Applied

J

Years to Next Nutrient Application

nutrient carry over
Nutrient Carry-over
  • Apply based on N needs of crop when applicable and P for rotation.
  • 2.6 year carry-over means the need for more P is not likely for 2-3 years, but dependant upon crop rotation and soil test level.
slide42

Nutrient Worksheet

C

Crop Nutrient Needs

60

65

160

-6 -20 -0

E

Additional Nutrients Needed

154 40 65

F

Manure Application Rate

ton/ac

gal/ac

13,000

G

Manure Nutrients Applied

-127 -195 -247

H

Additional Nutrients Applied

0 0 0

2.6 2.8

I

Crop Nutrient Balance*

27 -155 -182

D

Starter Fertilizer Applied

J

Years to Next Nutrient Application

slide43

Nutrient Worksheet

28.9 ac.

L

Value of Excess Nutrients Applied

$11,833.11

375,700 gal

597,390 gal

K

M

Spreadable Acreage (field sketch on back)

Manure Storage Management

Volume Applied =

Volume Remaining =

slide46

Nutrient Worksheet

28.9 ac.

L

Value of Excess Nutrients Applied

$11,833.11

375,700 gal

597,390 gal

K

M

Spreadable Acreage (field sketch on back)

Manure Storage Management

Volume Applied =

Volume Remaining =

slide47

$1,657

$3,419

$5,076

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

slide48

Nutrient Worksheet

28.9 ac.

L

Value of Excess Nutrients Applied

$11,833.11

375,700 gal

597,390 gal

$5,076

K

M

Spreadable Acreage (field sketch on back)

Manure Storage Management

Volume Applied =

Volume Remaining =

manure production
Manure Production

Dry Cows

Dry Cows

13.6

20

365

99,280 gal

Heifers

7.8

80

365

227,760 gal

973, 090

Does not include bedding or other additions to storage

total nutrients available
Total Nutrients Available
  • 973,090 gallons available
    • = $21,782 (PAN, P2O5, K2O)
  • Total PAN = 973.09 * 9.75 = 9,488 lb
    • 9,488 / 160 = 60 ac
    • 9,488 * $0.46/lb = $4,365
  • Total P2O5 = 973.09 * 15 = 14,596 lb
    • 14,596 / 60 = 243 ac
    • 14,596 * $0.37/lb =$5,400
  • Total K2O = 973.09 * 19 = 18,489 lb
    • 18,489/ 65 = 285 ac
    • 18,489 *$0.65 = $12,018
manure application records
Manure Application Records
  • Field record book
    • Emergency contact information
    • Spill response information
    • Equipment information
    • Detailed ‘day-of-application’ information
    • Winter application guidelines
break
Break
  • Pick up pencil + calculator
corn silage example
Corn Silage Example
  • Change planned crop to Corn Silage (26 T/ac) following Grain Corn (160 bu/ac)
  • Application (April-June) with direct inject/incorporate.
calculating pan example farm61
Calculating PAN- Example Farm

April/June

6

75%

25

33%

12.75

PAN worksheet top of page 3

heritage lane dairy
Heritage Lane Dairy

Dairy

12.75

15

19

heritage lane dairy63
Heritage Lane Dairy

190

C

Crop Nutrient Needs

230

85

-6

0

-20

E

Additional Nutrients Needed

184

230

65

13,000

F

Manure Application Rate

ton/ac

gal/ac

G

Manure Nutrients Applied

-166

-195

-247

H

Additional Nutrients Applied

0

0

0

-130

-17

I

Crop Nutrient Balance*

18

1.5

0

D

Starter Fertilizer Applied

J

Years to Next Nutrient Application

manure value change
Manure Value Change
  • What is the per acre change in manure nutrient value when the application period changes from Sept-Oct to April-June?
  • Only PAN changed.
    • 9.75 lb/1,000 gal (Sept-Oct)
    • 12.8 lb/1,000 gal (April-June)
  • 12.8 – 9.75 = 3.05 lb/1,000 gal
  • Price of N = $0.65/unit of N
    • 3.05 units * $0.65 = $1.98/1,000 gal
    • $18.83 - $25.77 / acre (9.5 – 13k gal/ac)
summary
Summary
  • 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.
summary66
Summary
  • 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

Amanda Meddles, meddles.14@osu.edu, 614-292-6625

Jon Rausch,

rausch.7@osu.edu, 614-292-4504

www.oema.osu.edu