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Soil characteristics and nutrient indexing of vineyards in Punjab, India

SUMMARY A survey of 46 vineyards was conducted to determine whether some nutritional disorder was the cause of declining yields. The surface soils, in general, are alkaline, calcareous, medium to high in organic matter, light in texture and sufficient in available micronutrients except B. Petiole analysis indicated a deficiency of Zn, Fe, Mn, B and Cu in 70, 52, 37, 20 and 13% as well as an excess of P and K in 35 and 93% of the vineyards respectively. Significant negative correlations of P with Fe and Mn and that of K with Zn showed that the lack of Fe, Mn and Zn might have been induced by excessive application of P and K fertilizers. Poor correlations between the DTPA-soluble concentrations of Cu, Fe, Mn and B in the soils and those in the petioles suggested the nutrient status of surface soils to be of little value in the nutrition of grape vines or that the petiole may not be the best tissue for this purpose.