Step 1 – Based on the soil test shown on P. 5 describe a soil sampling strategy for each field that will result in the taking of the proper number of soil samples. (Hint: Remember 5 acres per sample or fewer samples if both P and K are excessively high. See UWEX Pub. A2809 p. 4 for guidance on sample numbers for excessively high fields). On the Snap-Plus farm screen select crops to be grown and choose Sauk County, fill in your name and address, write a short narrative about what you are doing. Rotation starts in 2010 and 2013 is the last year of the 4 year rotation sequence. (C=corn grain, Cs=corn silage, A=Alfalfa, As=alfalfa seeding, S=soybean)

Step 2 – On the field screen enter field ID, acreage, major soil type (dominant soil if 10% or more of field area), slope (A:0-2%, B:2-6%, C:6-12%, D: 12-18%), set slope length to 300, set slope below field to 0-2%, measure distance to perennial water “blue line” stream, and start rotation for all fields in 2010.

Step 3 – Enter average soil test data (given in slide #5) for each field on the soil test screen. Note: Use separate screen for each field. Select a date in spring 2010 for soil test information.

Step 4 – Create an inventory of on-farm nutrient resources (Legume N credits and manure credits). Consider that all rotated alfalfa stands are poor and cut to less than 8 in. No second year alfalfa credits. Manure is not stored (daily haul) and all manure is surface applied, not incorporated. Manure type is semi-solid stalk bedded. Assume book credit for >20% DM. Don’t enter into Snap Plus.

Step 5 – Develop a manure allocation strategy using method shown in class for crop year 2013 using a P-based strategy that applies no more than 75 lb P2O5 (25 t/a). Note fields with manure spreading restrictions (no winter spreading if 300 ft. from stream, manure must be incorporated if otherwise spread w/in 300 ft. of stream, high groundwater).

Step 6 – Based on the crop rotation for each field credit the nutrients provided by manure and legume forage and show the final adjusted N, P2O5, and K2O recommendation for the 2013 crop year. Yields: corn = 170 bu/a; corn silage = 24 t/a; soybean = 55 bu/a, alfalfa seeding=2 t/a; alfalfa prod.=5 t/a. Select fall chisel/disk for all tillage systems.

Step 7 – List the Phosphorus Index for each field in 2013 when using a fall chisel/disk in all years. Change tillage to no-till in all years for fields 1, 4, 7, and 9 and list the revised Phosphorus Index.

Step 8 – Turn in soil sampling strategy and completed tables on pages 5 – 9 for full credit.

Steps to Develop a Nutrient Management Plan for Sunnyside Acres Using Snap-PlusRequirements for Assignment

FISC Soil and Crop Nutrient Management

Field 1 35 a

Field 9 12 a

Field 4 21 a

Field 7 20 a

Field 3 33 a

Field 2 29 a

Field 8 20 a

Field 5

18 a Field 6 12 a

1000 ft.

Individual Field Soil Type and Slope Selection

Field Acres Rotation Soil Type Slope pH Organic

Matter P K

1 35 CCCC 6.2 2.9 20 O 95 O

2 29 AsAAC 6.6 3.2 24 H 100 O

3 33 ACCC 6.7 3.3 150 EH 170 EH

4 21 CSCS 6.5 3.2 110 EH 160 EH

5 18 CsAsAA 6.1 2.0 16 L 110 H

6 12 CCCAs 6.9 2.8 20 O 100 O

7 20 AsAACs 6.3 2.9 90 EH 100 O

8 20 CAsAA 6.0 2.2 15 L 90 O

9 12 CsAsAA 6.6 2.1 25 O 120 H

Soil Sampling Strategy

Field Soil test P category

Soil test K category Number of samples Special considerations

1

2

3

4

5

6

7

8

9

Manure Generation Spreadsheet

Livestock Type Number Manure Produced Manure Collected

(produced x 0.85)

Milking and dry cows(21 t/yr)

75

Large heifers(15 t/yr) 15

Small heifers(7.5 t/yr) 30

Calves(2 t/yr) 30

Totals

Manure Allocation Ranking Spreadsheet

Field Acres Rotation Soil Test P

Soil Test K

Distance to Water Slope Texture Soil

DepthFinal Rank

Tons/field

Manure Balance

1 35

2 29

3 33

4 21

5 18

6 12

7 20

8 20

9 12

Final Nutrient Application Plan and Phosphorus Index

Field

Manure

Legume N credit

(lb N/a)

Net Fert. N rate

(lb N/a)

Net Fert. P2O5 rate

(lb P2O5/a)

Net Fert. K2O rate

(lb K2O/a)

Phosphorus Index(Fall Chisel/disk)

Phosphorus Index

(No-till)Rate (ton/a)

P2O5 applied

(lb P2O5/a)

K2O applied

(lb K2O/a)

1

2

3

4

5

6

7

8

9