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Gopalakrishnan, S and Kiran, B K and Humayun, P and Vidya, M. S. and Deepthi, K and Jacob, S and Vadlamudi, S and Alekhya, G and Rupela, O P (2011) Biocontrol of charcoal-rot of sorghum by actinomycetes isolated from herbal vermicompost. African Journal of Biotechnology, 10 (79). pp. 18142-18152. ISSN 1684-5315
Khanam, D and Bhuiyan, M A H and Hossain, A K M and Rupela, O P (1999) Evaluation of selected chickpea nodulation variants in Bangladesh. Bangladesh Agronomy Journal, 9 (1-2). pp. 51-56. ISSN 1013-1922
Hameeda, B and Rupela, O P and Reddy, G and Satyavani, K (2006) Application of plant growth-promoting bacteria associated with composts and macrofauna for growth promotion of Pearl millet (Pennisetum glaucum L.). Biology and Fertility of Soils, 43 (2). pp. 221-227.
Kang, G S and Beri, V and Sidhu, B S and Rupela, O P (2005) A new index to assess soil quality and sustainability of wheat-based cropping systems. Biology and Fertility of Soils, 41 (6). pp. 389-398. ISSN 0178-2762
Rupela, O P and Gopalakrishnan, S and Krajewski, M and Sriveni, M (2003) A novel method for the identification and enumeration of microorganisms with potential for suppressing fungal plant pathogens. Biology and Fertility of Soils, 39. pp. 131-134.
Rupela, O P and Sudharshana, M R (1990) Displacement of native rhizobia nodulating chickpea (Cicer arietinum L.) by an inoculant strain through soil solarization. Biology and Fertility of Soils, 10 (3). pp. 207-212. ISSN 0178-2762
Giller, K E and Sudarshana, M R and Thompson, J A and Rupela, O P (1988) Evaluation of 15N-isotope dilution for measurement of nitrogen fixation in chickpea (Cicer arietinum L.). Biology and Fertility of Soils, 6 (4). pp. 347-351.
Rupela, O P and Tauro, P (1985) Genetic control of hydrogen sulfide retention in Saccharomyces cerevisiae. Biotechnology Letters, 7 (4). pp. 279-282. ISSN 0141-5492
Singh, Onkar and Rupela, O P (1998) A New Gene that Controls Root Nodulation in Chickpea. Crop Science, 38 (2). pp. 360-362.
Rupela, O P (1992) Natural occurrence and salient characters of nonnodulating chickpea plants. Crop Science, 32 (2). pp. 349-352. ISSN 0011-183X
Hameeda, B and Reddy, Y H K and Rupela, O P and Kumar, G N and Reddy, G (2006) Effect of Carbon Substrates on Rock Phosphate Solubilization by Bacteria from Composts and Macrofauna. Current Microbiology, 53 (4). pp. 298-302. ISSN 0343-8651
Sidhu, B S and Rupela, O P and Beri, V and Joshi, P K (1998) Sustainability implications of burning rice- and wheat-straw in Punjab. Economic and Political Weekly, 33 (39). 163A-168A. ISSN 0012-9976
Gowda, C L L and Ramakrishna, A and Rupela, O P (2003) Sustainable crop production in developing countries: a daunting challenge ahead. Financing Agriculture, 35 (2). pp. 3-8.
Hameeda, B and Rupela, O P and Reddy, G (2006) Antagonistic activity of bacteria inhabiting composts against soil-borne plant pathogenic fungi. Indian Journal of Microbiology, 46 (4). pp. 389-396. ISSN 0046-8991
Sriveni, M and Rupela, O P and Gopalakrishnan, S and Krajewski, M (2004) Spore-forming bacteria, a major group among potential antagonists isolated from natural sources such as termitaria soil and composts used by organic farmers. Indian Journal of Microbiology, 44 (2). pp. 95-100. ISSN 0046-8991
Ranga Rao, G V and Rupela, O P and Rao, V R and Reddy, Y V R (2007) Role of biopesticides in crop protection: present status and future prospects. Indian Journal of Plant Protection, 35 (1). pp. 1-9.
Singh, Onkar and Rupela, O P (1991) Genetic Relationship Among the Newly Identified Non-nodulating Chickpea Lines. International Chickpea Newsletter, 25. pp. 11-12.
Rupela, O P and Singh, Onkar and Sivaramakrishna, C and Rao, T P (1991) Maintenance of Seed Purity in Nonnodulating Lines of Chickpea. International Chickpea Newsletter, 23. p. 43.
Rupela, O P and Mittal, S and Dart, P J and Thompson, J A and Sudarshana, M R and Toomsan, B and Annapurna, K (1991) Variability in Different Characters of Bacteria Nodulating Chickpea. International Chickpea Newsletter, 25. pp. 35-36.
Rupela, O P (1990) A Visual Rating System for Nodulation of Chickpea. International Chickpea Newsletter, 22. pp. 22-25.
Singh, Onkar and Rupela, O P and Rheenen, H A van (1986) Genetics of nonnodulation in chickpea. International Chickpea Newsletter, 15. pp. 5-6.
Rupela, O P and Sundarshana, M R (1986) Identification of a nonnodulating spontaneous mutant in chickpea. International Chickpea Newsletter, 15. pp. 13-14.
Sithanantham, S and Rupela, O P (1986) Insect damage to chickpea root nodules. International Chickpea Newsletter, 15. pp. 12-13.
Toomsan, B and Rupela, O P and Mittal, S and Dart, P J (1979) Counting chickpea rhizobia in soils. International Chickpea Newsletter, 1. pp. 10-11.
Ansari, M A and Rupela, O P and Douaik, A and Gopalakrishnan, S and Sharma, S B (2002) Effect of culture filtrates of Pseudomonas striata, Trichoderma harzianum, T. viride and Aspergillus awamori on egg hatch of Meloidogyne javanica. International Journal of Nematology, 12 (2). pp. 131-136. ISSN 1368-8774
Ramakrishna, A and Rupela, O P and Reddy, S L N and Sivaramakrishna, C (1992) Promising herbicides for weed control in chickpea. International Journal of Pest Management, 38 (4). pp. 398-399. ISSN 0967-0874
Hameeda, B and Rupela, O P and Wani, S P and Reddy, G (2006) Indices to Assess Quality, Productivity and Sustainable Health of Soils Receiving Low Cost Biological and/or Conventional Inputs. International Journal of Soil Science, 1 (3). pp. 196-206. ISSN 1816-4978.
Rupela, O P and Wani, S P and Danso, S K A and Johansen, C (1995) Effect of a High Nodulating Selection of Chickpea Cultlvar ICC 4948 on 5011 Properties of a Chlckpea- Sorghum Cropping System Yield and. Journal of soil biology & ecology., 15 (2). pp. 127-134. ISSN 0970-1370
Hameeda, B and Harini, G and Rupela, O P and Wani, S P and Reddy, G (2008) Growth promotion of maize by phosphate-solubilizing bacteria isolated from composts and macrofauna. Microbiological Research, 163 (2). pp. 234-242. ISSN 0944-5013
Ranga Rao, G V and Rupela, O P and Wani, S P and Rahman, S J and Jyothsna, J S and Rameshwar Rao, V and Humayun, P (2007) Bio-intensive pest management reduces pesticide use in India. Pesticides News , 76. pp. 16-17.
Ali, M Y and Krishnamurthy, L and Saxena, N P and Rupela, O P and Kumar, J and Johansen, C (2002) Scope for genetic manipulation of mineral acquisition in chickpea. Plant and Soil, 245 (1). pp. 123-134.
Wani, S P and Rupela, O P and Lee, K K (1995) Sustainable agriculture in the semi-arid tropics through biological nitrogen fixation in grain legumes. Plant and Soil, 174 (1-2). pp. 29-49. ISSN 0032-079X
Rupela, O P and Johansen, C (1995) Identification of non-nodulating, and low and high nodulating plants in pigeonpea. Soil Biology and Biochemistry, 27 (4-5). pp. 539-544. ISSN 0038-0717
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
Toomsan, B and Rupela, O P and Mittal, S and Dart, P J and Clark, K W (1984) Counting Cicer-Rhizobium using a plant infection technique. Soil Biology and Biochemistry, 16 (5). pp. 503-507. ISSN 0038-0717
Yoneyama, T and Engelaar, W M H G and Kim, H Y and Rupela, O P (2001) δ15N values of sorghum grains harvested on a Vertisol in the semi-arid tropics were positively related to doses of fertilizer N but negatively with the frequency of legume cultivation. Soil Science and Plant Nutrition, 47 (2). pp. 423-427. ISSN 0038-0768