1[1]Ahmad T, Hafeez F Y, Malik K A. Residual effect of nitrogen fixed by mungbean (Vigna radiata ) and blackgram (Vigna mungo) on subsequent rice and wheat crop[J]. AustJ ExptAgri,2001, 41:245～248.
2[2]Ali S, Hamid N, Nagina N, et al. Screening of phosphate solubilizing microorganisms using different original and modified culture media[J]. Biologia, 1998a, 44(102):110～122.
3[3]Ali S, Hamid N, Khan D, et al. Use of Azolla as biofertilizer to enhance crop yield in a rice-wheat cropping system under mild climate[C]. 1998b;353～357.In, Proc. 7th Int. Symp. on Nitrogen Fixation with Non-Legumes. Held Oct. 16- 21, 1996, Faisalabad. Eds. KA Malik, MS Mirza and JK Ladha. Kluwer Academic Publishers. Dordrecht, The Netherlands.
4[4]Asad S, Malik K A, Hafeez F Y. Competition between inoculated and indigenous Rhizobium/brady Rhizobium spp. strains for nodulation of grain and fodder legumes in Pakistan[J]. Biology and Fertility of Soils, 1991,12: 107～111.
5[5]Hafeez, F Y, Ashraf M, Malik K A. Production of legume bio-fertilizer[C]. In: Managing Soil Resources.Proceedings of AST National Congress of Soil Science,Labore, October 1985 ,1986 ,446～453.
6[6]Hafeez F Y, Aslam Z, Malik K A. Effect of salinity and inoculation on growth, nitrogen fixation and nutrient uptake of Vigna radiata (L.) Wilczek [J]. Plant and Soil,1988,106:3～8.
7[7]Hafeez F Y, ldris M, Malik K A. Growth and survival of cowpea bradyrhizobia in various carrier materials [J]. Biology and Fertility of Soils, 1989,7: 279～282.
8[8]Hafeez F Y, Asad S, Malik K A. The effect of high temperature on Vigna radiata nodulation and growth with different bradyrhizobial strains [J]. Environmental and Experimental Botany, 1991, 31(2): 285 ～294.
9[9]Hafeez F Y, Asad S, Ahmad T, et al. Host specificity and characterization of fast growing rhizobia from Macroptilium atropurpureum cv. Siratro in Pakistan [J].Soil Biology and Biochemistry, 1995,27(4/5): 729～733.
10[10]Hafeez F Y, Khan M A,Hameed S, et al. Use of Gus marked Rhizobium and Brady Rhizobium strains for studying the effect of temperature on infection process [J]. Pah. J. Bot,1995,27 (1):55～62.
