Cowpea-Group Rhizobium In Soils Of The Semiarid Tropics

Rao, J V D K K and Dart, P J and Khan, M U (1982) Cowpea-Group Rhizobium In Soils Of The Semiarid Tropics. In: Biological Nitrogen Fixation Technology for Tropical Agriculture, 9-13 March 1981, Cali, Colombia.

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Population of "cowpea-group" Rhizobium in fields at ICRISAT were estimated by the most probable number(MPN) method using siratro (Macropulium atropurpureum) as host. There was usually a large variability in Rhizobium numbers between sampling sites in the same Held. The populations were more consistent in Alfisols (range from 104 to 3 x 105 /g soil) than in Vertisols (0 to 106 /g soil) and decreased with depth. In paddy fields, the numbers were very low. Pigeonpea cultivars ICP-7332 (small seeded) and ICP-1 (medium sized), grown in test tubes, could also be used for the MPN method. In four of five soils tested, counts with pigeonpea as host were less than when siratro was used.

Item Type: Conference or Workshop Item (Paper)
Subjects: Others > Soil Science
Others > Agriculture-Farming, Production, Technology, Economics
Depositing User: Library ICRISAT
Date Deposited: 27 Dec 2011 09:45
Last Modified: 27 Dec 2011 09:45
Acknowledgement: UNSPECIFIED
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