Chickpea rhizobium populations: Survey of influence of season, soil depth and cropping pattern

Rupela, O P and Toomsan, B and Mittal, S and Dart, P J and Thompson, J A (1987) Chickpea rhizobium populations: Survey of influence of season, soil depth and cropping pattern. Soil Biology and Biochemistry, 19 (3). pp. 247-252. ISSN 0038-0717

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Chickpea Rhizobium populations in soil samples from research stations and farmers' fields in different geographic regions of India ranged from <10 to > 104 rhizobia g−1 soil. Fields on research stations with a known history of chickpea cropping had more rhizobia (calc. 103 to 105 rhizobia g1&#x0304; soil) than the majority of farmers' fields (calc. < 10 to 103 rhizobia g−1 soil). In the absence of chickpea in the cropping pattern, soils generally had < 102 rhizobia g1&#x0304; and crops in such fields nodulated poorly. However, poor nodulation was also observed when populations of rhizobia were high, indicating that other factors were also important for nodulation. There was no obvious consistent correlation of Rhizobium population with pH, electrical conductivity and nitrate-nitrogen status of the soil. Rhizobium populations declined with soil depth and were highest (about 104 rhizobia g−1 soil) in the top 30 cm of the profile and lowest, but still present (calc. 103–103 rhizobia g'1 soil), at 90–120 cm—a depth where no nodules are found. Populations fluctuated most in the top 5 cm, being reduced during periods of high soil temperature in summer and recovering after rains. Rhizobium populations were at a maximum after chickpea but survived well under pigeonpea, groundnut and maize. When rice followed an inoculated chickpea crop, there was about a 100-fold decrease in the Rhizobium population

Item Type: Article
Subjects: Mandate crops > Chickpea
Others > Soil Science
Others > Climate Change
Depositing User: Mr B K Murthy
Date Deposited: 20 Jun 2014 08:38
Last Modified: 20 Jun 2014 08:38
Official URL:
Acknowledgement: We thank Dr A. S. Tiwari, Dr R. B. Sharma and Mr R.B. Yadav of the Agricultural Research Station, Morena. Madhya Pradesh, for supplying soil samples; Mr K. P. Tiwari, College of Agriculture, Gwalior, Madhya Pradesh, Mr M. D. Gupta. officer-in-charge. ICRISAT Substation, Gwalior. Madhya Pradesh. for help during the survey around Gwalior, Dr. C. Johansen, Principal Pulse Agronomist for critical review and Mr P. V. S. Prasad for help in typing the manuscript. Published as Journal article 550 of the International Crops Research Institute for the Semi-Arid Tropics.
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