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Calibration of soil test values for coffee

by Raju, T.
Publisher: Ene 1988Subject(s): SUELOS | DISPONIBILIDAD DE NUTRIENTES | NIVELES CRITICOS | INDIA | NUTRIENT AVAILABILITY | INDIA | DISPONIBILITE D'ELEMENT NUTRITIF | INDE In: Journal of Coffee Research (India) v. 18(1) p. 28-35Summary: The soil-test data and the yield figures obtained in the course of soil testing programmes in various coffee zones were utilized to fix the critical levels of soil pH, available phosphorus and available potassium for coffee. Application of Cate and Nelson's procedure of non-parametric test of association indicated that the critical soil pH for coffee under South Indian conditions was 5.8 - 5.9. For available phosphorus and potassium, the critical values were found to be 7 and 60-80 ppm respectively. No appreciable differences were noticed in the critical soil-test values between arabica and robusta plantations
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The soil-test data and the yield figures obtained in the course of soil testing programmes in various coffee zones were utilized to fix the critical levels of soil pH, available phosphorus and available potassium for coffee. Application of Cate and Nelson's procedure of non-parametric test of association indicated that the critical soil pH for coffee under South Indian conditions was 5.8 - 5.9. For available phosphorus and potassium, the critical values were found to be 7 and 60-80 ppm respectively. No appreciable differences were noticed in the critical soil-test values between arabica and robusta plantations

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