Diagnostic Soil Nutrient Standards and Identification of Yield Limiting Nutrients in Onion (Allium cepa) Using DRIS

Authors

  • K Anjaneyulu Author

DOI:

https://doi.org/10.24154/jhs.v3i1.592

Keywords:

Nutrients, Norms, DRIS Indices, Onion

Abstract

Soil samples collected from a survey of fifty onion growing fields in Karnataka were analyzed for various macro and micronutrients for establishing a data bank to develop soil nutrient norms. By using Diagnosis and Recommendation Integrated System (DRIS), the whole population was divided into two sub-groups namely, low and high yielding and selected nutrient expressions that have shown higher variance and lower coefficient of variation as diagnostic norms, viz K/N (1.229), S/N (0.238), Ca/N (20.62), P/Zn (37.41), Mg/K (0.6.859), Fe/Mg (0.004), Fe/Zn (5.736) etc. In addition, five nutrient ranges have been derived using mean and standard deviation as low, deficient, optimum, high and excess for each nutrient to serve as a guide for diagnostic purpose. The optimum organic carbon ranged from 7.1 to 11.0 g kg-1, N from 115 to 178 mg kg-1, P from 26 to 38 mg kg-1 , K from 163 to 217 mg kg-1, Ca from 2199 to 3398 mg kg-1 , Mg from 802 to 1167 mg kg-1 and S from 34 to 43 mg kg-1. Among DTPA extractable micronutrients, the optimum iron ranged from 3.40 to 4.34 mg kg-1, manganese from 5.84 to 6.66 mg kg-1, zinc from 0.67 to 1.01 mg kg-1 and copper from 1.70 to 2.11 mg kg-1 for onion. The diagnosis of nutrient imbalance identified through DRIS indices indicated that organic carbon, phosphorus and zinc were the most common yield limiting nutrients in onion.

References

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Published

30-06-2008

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Section

Original Research Papers

How to Cite

Anjaneyulu, K. (2008). Diagnostic Soil Nutrient Standards and Identification of Yield Limiting Nutrients in Onion (Allium cepa) Using DRIS. Journal of Horticultural Sciences, 3(1), 39-42. https://doi.org/10.24154/jhs.v3i1.592

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