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Long-Term Application of Nutrients in Continuous Cotton: 1972-2006 Study Insights

This study, initiated in spring 1972 by Dr. Billy Tucker at the Irrigation Research Station in Altus, Oklahoma, explores the effects of long-term applications of nitrogen (N), phosphorus (P), and potassium (K) on continuous cotton cultivation. Using clay loam soil, the research implemented an incomplete factorial design with varying N rates (45 to 225 kg/ha) and fixed P (20 to 59 kg/ha) and K (75 kg/ha) levels. Findings highlight the response of different cotton varieties to nutrient applications, informing better agronomic practices.

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Long-Term Application of Nutrients in Continuous Cotton: 1972-2006 Study Insights

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  1. Long-Term Application of N, P and K in Continuous Cotton, 1972-2006

  2. Site characteristics • Initiated in spring of 1972 by Dr. Billy Tucker • At the Irrigation Research Station, Altus • Clay loam

  3. Variety, dates, seed rate, irr. Frequency

  4. Treatments • Incomplete factorial combination of N, P and K • N rates 45, 90, 135, 180, 225 kg/ha • P rates 20, 39, 59 kg/ha • K 75 kg/ha

  5. check plot

  6. highest N rate

  7. At maturity

  8. Lint yield by variety, Altus, OKlahoma

  9. Response to continuous application of N by variety cotton experiment, Altus, Oklahoma.

  10. Response to P application by variety, cotton experiment, Altus, Oklahoma.

  11. Response to K application by variety, cotton experiment, Altus, Oklahoma.

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