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Effects of Nutrient Management and Fungicides on Soybeans in Southern Illinois

Effects of Nutrient Management and Fungicides on Soybeans in Southern Illinois. S. A. Ebelhar, and C. D. Hart. OBJECTIVES. Determine the effects of potassium, chloride, boron and manganese nutrition on the response of soybeans to diseases (possibly including Asian soybean rust)

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Effects of Nutrient Management and Fungicides on Soybeans in Southern Illinois

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  1. Effects of Nutrient Management and Fungicides on Soybeans in Southern Illinois S. A. Ebelhar, and C. D. Hart Ebelhar et al., 2005

  2. OBJECTIVES • Determine the effects of potassium, chloride, boron and manganese nutrition on the response of soybeans to diseases (possibly including Asian soybean rust) • Evaluate the nutrient interaction effects with and without the application of fungicides • Compare these effects across Roundup Ready and conventional herbicide programs. Ebelhar et al., 2005

  3. Soil Tests (ppm), 2005 Ebelhar et al., 2005

  4. Soil Tests (ppm), 2005 Ebelhar et al., 2005

  5. Treatment Effects on Yield, 2005 NS NS Ebelhar et al., 2005

  6. Variety and Fungicide Effects on Yield, 2005 a ** NS NS b b Ebelhar et al., 2005

  7. Rainfall after Planting and Foliar Applications, Dixon Springs, 2005 Planted 5/25 Fung. & Mn & B (7/19) Mn & B (7/1) 5/4 Ebelhar et al., 2005

  8. Rainfall after Planting and Foliar Applications, Brownstown, 2005 Planted 5/4 Mn & B (7/5) Fung. & Mn & B (7/15) 5/4 Ebelhar et al., 2005

  9. Treatment Effects on Soybean Injury, 2005 *** *** Ebelhar et al., 2005

  10. Variety and Fungicide Effects on Soybean Injury, 2005 a b b *** NS NS Ebelhar et al., 2005

  11. Variety x Fungicide Effects on Frogeye Leaf Spot, DSAC, 2005 Fung *** Var: a b b Ebelhar et al., 2005

  12. Treatment Effects on Soybean Trifoliate Leaf N Conc., 2005 * NS Ebelhar et al., 2005

  13. Variety and Fungicide Effects on Soybean Leaf N Conc., 2005 b a a NS b a a NS Ebelhar et al., 2005

  14. Treatment Effects on Soybean Trifoliate Leaf K Conc., 2005 NS * Ebelhar et al., 2005

  15. Variety and Fungicide Effects on Soybean Leaf K Conc., 2005 b a b * b a b NS Ebelhar et al., 2005

  16. Treatment Effects on Soybean Trifoliate Leaf Ca Conc., 2005 NS NS Ebelhar et al., 2005

  17. Variety and Fungicide Effects on Soybean Leaf Ca Conc., 2005 c b a *** b b a NS Ebelhar et al., 2005

  18. Treatment Effects on Soybean Trifoliate Leaf S Conc., 2005 NS NS Ebelhar et al., 2005

  19. Variety and Fungicide Effects on Soybean Leaf S Conc., 2005 c a b NS b a a NS Ebelhar et al., 2005

  20. Treatment Effects on Soybean Trifoliate Leaf B Conc., 2005 *** *** Ebelhar et al., 2005

  21. Variety and Fungicide Effects on Soybean Leaf B Conc., 2005 NS *** b b a NS Ebelhar et al., 2005

  22. Treatment Effects on Soybean Trifoliate Leaf Mn Conc., 2005 *** *** Ebelhar et al., 2005

  23. Variety X Treatment Effects on Soybean Trifoliate Leaf Mn Conc., DSAC, 2005 Ebelhar et al., 2005

  24. Variety and Fungicide Effects on Soybean Leaf Mn Conc., 2005 NS *** b b a NS Ebelhar et al., 2005

  25. SUMMARY • Foliar application of B and Mn increased the leaf composition of B and Mn, respectively, and caused some injury to the soybean plants but had no effect on yield. • Disease pressure was low, but was affected by variety choice and by fungicide treatment, but not fertilizer treatment at Dixon Springs. • Fungicide application at Brownstown caused some leaf injury and slightly reduced yields. Ebelhar et al., 2005

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