Fertilizer Recommendation Tables - 2007 Revision

Enclosed are copies of all fertilizer requirement tables for field grown crops dated fall 2005, along with lime requirement tables and messages which are printed out on soil test forms for specific conditions. Please discard your old tables. 

Tables listing the Crop Nutrient Removal values that are used in the NMAN2 computer program have been included. These will be updated from time to time by OSMRSC as data becomes available.

• Changes to the recommendations in 2007 include:
• New nitrogen recommendations for Ginseng
• New nitrogen recommendations for processing tomatoes under drip fertigation on coarse textured soils
• Revised nitrogen recommendation for carrots grown on established muck
• Revised nitrogen recommendation for field grown nursery crop
• The soil test rating system has been changed, effective January 1, 2008, to reflect the probability of response to added nutrients, as shown in the following table:

An infosheet has been prepared that gives more detail on the response categories (attached).

All soil tests reporting soil test categories will include the following short message, for a period of 1 year

New Categories on Soil Test Reports

The categories for analytical values for phosphorus, potassium and magnesium on soil test reports have changed to reflect the probability of profitable crop response to applied nutrients. No changes have been made to the actual crop specific fertility recommendations. These changes only affect the reporting system.

HR, MR, LR, RR, and NR denote, respectively, high, medium, low, rare and no probabilities of profitable crop response to applied nutrient.

Profitable response to applied nutrients occurs when the increase in crop value, from increased yield or quality, is greater than the cost of the applied nutrient.

For more information, see (New Soil Test Categories).

Fertilizer recommendations in these tables have been approved by the Ontario Soil Management Research and Services Committee and the appropriate sub-committee.

The OSMRSC executive committee welcomes suggestions and research data to make changes to the recommendations. Such information should be forwarded to:

Mr. Keith Reid, Secretary
Ontario Soil Management Research and Services Committee
c/o Ontario Ministry of Agriculture, Food and Rural Affairs
581 Huron Street
Stratford, Ontario N5A 5T8

By December 14, 2007, for consideration in 2008.

Please let me know of any changes or concerns about the 2007 recommendations.

Keith Reid,
Soil Fertility Specialist, OMAFRA
519-271-9269
keith.reid@ontario.ca

Table of Contents

1. Nitrogen Soil Test for Corn
2. Nitrate-nitrogen Soil Test and Spring Barley (Based on Nitrate-nitrogen Soil Test)
3. Nitrogen Requirements - Annual Field Crops
4. General Recommended Nitrogen Rates for Corn: Corn N Worksheet
5. Nitrogen Requirements for Spring Canola (Hybrid or Open-Pollinated)
6. Nitrogen Requirements - Perennial Forages
7. Phosphorus Requirement Table - Field Crops
8. Potassium Requirement Table - Field Crops
9. Nitrogen Requirements for Vegetables on Mineral Soils
10. Phosphorus Requirement Table - Vegetables on Mineral Soils
11. Potassium Requirement Table - Vegetables on Mineral Soils
12. Nitrogen Requirements for Vegetables on Organic Soils
13. Phosphorus and Potassium Requirements - Vegetables on Organic Soils
14. General Nitrogen Recommendations for Tobacco on a Loamy Sand Soil¹
15. Phosphorus and Potassium Requirements - Tobacco
16. Nitrogen Requirements for Turf and Nursery Sod
17. Phosphorus and Potassium Requirements for Turf and Nursery Sod
18. Nitrogen Requirements for Berries, Tree Fruits, Grapes and Nursery Stock
19. Phosphorus and Potassium Requirements for Berries, Tree Fruits, Grapes and Nursery Stock
20. Soil Acidity and Liming
21. Lime Requirements to Correct Soil Acidity Based on Soil pH and Soil Buffer pH
22. Magnesium Soil Test Ratings and Interpretations for All Crops
23. Manganese Requirement Table and Zinc Requirement Table
24. Crop Removal Values as used in NMAN2 (Oct 12/2007)
25. Messages to be Printed on Soil Test Reports

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