Elsevier

Pedosphere

Volume 25, Issue 2, April 2015, Pages 316-328
Pedosphere

Major Soil Chemical Properties of the Major Tea-Growing Areas in India

https://doi.org/10.1016/S1002-0160(15)60016-9Get rights and content

Abstract

Major chemical properties of tea-growing soils are of paramount importance for better management in a sustainable fashion. Therefore, this study was carried out to understand the major soil chemical properties of major tea (Camellia sinensis L.)-growing areas, Dibrugarh and Tinsukia districts, in the state of Assam, India. A total of 991 surface soil samples were collected from 15 large tea estates (TEs) for analysis of their major chemical properties. Soil pH ranged from 3.61 to 6.81. Total organic carbon and total nitrogen ranged from 2.4 to 47.3 and 0.24 to 3.60 g kg−1, respectively. All soils were sufficiently rich in plant-available potassium (as K2O), which ranged from 127.71 to 252.33 mg kg−1, exceeding the amount prescribed for optimum tea yield of ≥ 100 mg kg−1. Plant-available sulfur among soil samples widely varied from 4 to 129 mg kg−1. Results of hierarchical clustering analysis for homogenous grouping of the 15 TEs based on soil chemical properties showed that the 15 TEs could be classified into three distinct groups which consisted of 6, 8 and 1 TEs, respectively. Based on the Kolmogorov-Smirnov (K-S) test, the best fitted theoretical probability distributions were found out for different soil chemical properties. It could be concluded that a balanced fertilizer application would be needed as a part of tea improvement program using soil chemical test.

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