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N-P-K Rates by Yield Goal

This study analyzes the impact of different N-P-K fertilizer rates on cotton yield goals, taking into account 2017 fertilizer prices. The findings are presented for the variety DP 1646, both for actual yield and yield goals. The effect of nitrogen rates in relation to tillage is also examined for 2017 and 2018 in the RDC Pivot field.

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N-P-K Rates by Yield Goal

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  1. N-P-K Rates by Yield Goal • Yield GoalN-P-K Applied IncreaseCost* • 30-50-80 ----- ------ • 45-50-90 15-0-10 $ 9.10 • 60-60-90 15-10-0 $10.10 • 75-60-100 15-0-10 $ 9.10 • 90-70-110 15-10-10 $12.90 • 2000 105-70-120 15-0-10 $ 9.10 * 2017 Fertilizer prices – 42-38-28 (cents/lb N-P2O5-K2O)

  2. Fertilizing Cotton (N-P-K) By Yield Goal - 2017 Variety = DP 1646 Actual Yield (lb lint/a) Yield Goal (lb lint/a)

  3. Fertilizing Cotton (N-P-K) By Yield Goal - 2017 Variety = DP 1646 Actual Yield (lb lint/a) Yield Goal (lb lint/a)

  4. Fertilizing Cotton (N-P-K) By Yield Goal - 2017 Variety = DP 1646 Actual Yield (lb lint/a) -22 lb -15.40 $12.90 43 lb $30.10 $10.10 169 lb $118 $9.10 -57 lb -$39.90 $9.10 295 lb $206 $9.10 Yield Goal (lb lint/a)

  5. Fertilizing Cotton (N-P-K) By Yield Goal – Expo 2017 Actual Yield (lb lint/a) Yield Goal (lb lint/a)

  6. Fertilizing Cotton (N-P-K) By Yield Goal - 2018 Variety = DP 1646 Actual Yield (lb lint/a) Yield Goal (lb lint/a)

  7. RDC Pivot – 2017Nitrogen Rate x Tillage N Rate (lb/a)

  8. RDC Pivot – 2018Nitrogen Rate x Tillage N Rate (lb/a)

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