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20. Precision Pasture Management
- 1. Precision Pasture Management Christine O’Reilly Forage and Grazing Specialist, OMAFRA Eastern Ontario Crops Conference Kemptville, ON February 12, 2019
- 2. Precision Agriculture Use of data to inform management decisions in farm businesses • High-tech or low-tech • Goal: increase profitability
- 3. Number Crunching Based on OMAFRA Pub 60 Field Crop Budgets Assumptions: Forage valued at $200/ac, average insurance premium rate across all options applied; 80 acre pasture, 50 cow-calf pairs, 1.5 acres/pair, enclosed with 2 strand high-tensile electric, 1 500m water pipes, 100 gal stock tank, amortized over 5 years, cost of amortization doubled as maintenance factor
- 4. Number Crunching Based on OMAFRA Pub 60 Field Crop Budgets Assumptions: Forage valued at $200/ac, average insurance premium rate across all options applied; 80 acre pasture, 50 cow-calf pairs, 1.5 acres/pair, enclosed with 2 strand high-tensile electric, 1 500m water pipes, 100 gal stock tank, amortized over 5 years, cost of amortization doubled as maintenance factor
- 5. Number Crunching Based on OMAFRA Pub 60 Field Crop Budgets Assumptions: Forage valued at $200/ac, average insurance premium rate across all options applied; 80 acre pasture, 50 cow-calf pairs, 1.5 acres/pair, enclosed with 2 strand high-tensile electric, 1 500m water pipes, 100 gal stock tank, amortized over 5 years, cost of amortization doubled as maintenance factor
- 6. Number Crunching Based on OMAFRA Pub 60 Field Crop Budgets Assumptions: Forage valued at $200/ac, average insurance premium rate across all options applied; 80 acre pasture, 50 cow-calf pairs, 1.5 acres/pair, enclosed with 2 strand high-tensile electric, 1 500m water pipes, 100 gal stock tank, amortized over 5 years, cost of amortization doubled as maintenance factor
- 7. Number Crunching Based on OMAFRA Pub 60 Field Crop Budgets Assumptions: Forage valued at $200/ac, average insurance premium rate across all options applied; 80 acre pasture, 50 cow-calf pairs, 1.5 acres/pair, enclosed with 2 strand high-tensile electric, 1 500m water pipes, 100 gal stock tank, amortized over 5 years, cost of amortization doubled as maintenance factor
- 8. Number Crunching Based on OMAFRA Pub 60 Field Crop Budgets Assumptions: Forage valued at $200/ac, average insurance premium rate across all options applied; 80 acre pasture, 50 cow-calf pairs, 1.5 acres/pair, enclosed with 2 strand high-tensile electric, 1 500m water pipes, 100 gal stock tank, amortized over 5 years, cost of amortization doubled as maintenance factor
- 9. Number Crunching Beef Cow Dry Ewe Body weight 590 kg (1300 lbs) 100 kg (220 lbs) Daily DMI @ 2.6% 15.34 kg (33.8 lbs) 2.6 kg (5.72 lbs) Hay Pasture Hay Pasture COP/acre $318.50 $175.96 $318.50 $175.96 Cost/head/day $1.55 $0.86 $0.26 $0.15
- 10. Number Crunching Beef Cow Dry Ewe Body weight 590 kg (1300 lbs) 100 kg (220 lbs) Daily DMI @ 2.6% 15.34 kg (33.8 lbs) 2.6 kg (5.72 lbs) Hay Pasture Hay Pasture COP/acre $318.50 $175.96 $318.50 $175.96 Cost/head/day $1.55 $0.86 $0.26 $0.15
- 11. Goal: Increase Profitability • Extend the grazing season • Reduce number of days on stored feed during “summer slump” • Efficiently use on-farm forage • Target improvements before declines impact margins What data do we need to do this?
- 12. Goal: Increase Profitability • # of grazing days • # of days feeding supplemental forage • % grass utilization, stage of maturity, rate of growth • yield
- 13. Precision Pasture Management • Grazing wedge • Grazing chart • Grazing wheel These only work with rotational grazing systems Photo: Jillian Craig
- 17. Grazing Wedge Advantages • Easy to track: – Target grass yields – Rate of grass growth • Enables prediction of surpluses and deficits • Paper or mobile app Disadvantages • Requires regular yield measurements
- 19. Measuring Tools C-Dax Pasture Meter + • Laser measuring • GPS mapping • Max speed 20km/h • NZ $6990.00
- 20. Grazing Wedge – Apps for That • University of Missouri Extension Grazing Wedge https://grazingwedge.missouri.edu/
- 21. Grazing Wedge – Apps for That • farmGRAZE (free version, full version $9.48) www.mobilefarmapps.com/ apps.html
- 23. Grazing Chart Advantages • Easy to track: – Days grazing – Days rest – Number of rotations – Relevant weather data • Enables calculation of: – Yield – Carrying capacity • Paper or digital Disadvantages • Limited predictive ability
- 24. Grazing Chart – Apps for That • Pasture Map – Ranch Management (free 14 day trial, starts at US $42/month) https://pasturemap.com/
- 25. Grazing Chart – Apps for That • Pasture Map – Ranch Management (free 14 day trial, starts at US $42/month) https://pasturemap.com/
- 26. Grazing Chart – Apps for That • MaiaGrazing (free version, full version starts AUS $60/month) https://maiatechnology.com.au/
- 27. Grazing Chart – Apps for That • MaiaGrazing (free version, full version starts AUS $60/month) https://maiatechnology.com.au/
- 28. Grazing Wheel Julian dates make the math easier
- 29. Grazing Wheel Advantages • Easy to track: – Days grazing – Days rest – Number of rotations • Enables calculation of: – Yield – Carrying capacity Disadvantages • No predictive ability • Entering other data can make the wheel illegible
- 30. Take Home • Precision ag = using data to inform decisions • Lower COP = wider margins • FIRST understand what data you need • Grazing wedges, charts, and wheels serve different purposes, use different data • Precision ag can be high-tech or low-tech
- 31. Thank You Christine O’Reilly Forage and Grazing Specialist christine.oreilly@ontario.ca 705-324-5855 Twitter: @OReilly_Ag www.fieldcropnews.com