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Gopalakrishnan, S and Girish, A G (1997) Effect of Climatic factors on the growth of rhizobia of sesbania bispinosa in the in vitro condition. Crop Improvement, 24 (1). pp. 115-117. ISSN 0256-0933
Nguluu, S N and Probert, M E and Myers, R J K and Waring, S A (1997) Effect of tissue phosphorus concentration on the mineralisation of nitrogen from stylo and cowpea residues. Plant and Soil, 191 (1). pp. 139-146. ISSN 1573-5036
Rupela, O P and Khurana, A L (1997) Limitations and potentials in improving biological nitrogen fixation of pulses: A critical assessment. In: Recent Advances in Pulses Research. Indian Soceity of Pulses Research and Development, Kanpur, pp. 525-542.