- امامی، ع.، 1375. روشهای تجزیه گیاه (جلد اول). انتشارات موسسه تحقیقات آب وخاک. نشریه شماره 982 . 128 صفحه.
- غازان شاهی، ج.، 1376. آنالیز خاک و گیاه. چاپ هما، تهران. 427 صفحه.
- Akhromeiko, A.L. and Shstakova, V.A., 1958. The influence of rhizosphere microorganisms on the uptake and secretion of phosphorous and sulfur by the root of arboreal seedlings. In Proc. of 2nd U.N. Internat. Conf. Peace. Uses Atomic Energy, 193 – 199.
-Asea, P.E., Kucey, R.M.N and Stewart, J.W.B., 1988. Inorganic phosphate solubilization by two penicillium species in solution culture and soil. Plant Soil, 24 (4): 459-464.
- Bossjer P., Hofte M. and Verstraete, W., 1988. Ecological significance of siderophores in soil . Advanced in Microbial Ecology, 10: 385-414.
- Bowen, G. and Rovira, A.D., 1961. The influence of microorganisms on plant growth. I. Development of root and root hairs in sand and agar. Plant Soil, 15:166-188.
- Brown, M.E., 1974. Seed and root bacterization. Ann. Rev. Phytopath, 12: 181-197.
- Chanway, C.P. and Holl, F.B., 1992. Influence of soil biota on Douglas-fir (Pseudotsuga menziesii [Mire.] Franco) seedling growth. The role of rhizosphere bacteria. Can. J. Bot. 70: 1025-1031.
- Chanway, C.P. and Holl, F.B., 1994. Growth of outplanted lodgepole pine seedling one year after inoculation with plant growth promoting rhizobacteria. For. Sci. 40: 238-246.
- Cuningham, J.E. and Kuiack, C., 1992. Production of citric acid and oxalic acid and solubilization of calcium phosphate by Penicillium biliji. App. Env. Mic. 56: 1451-1456.
- Curl, E.A. and Truelove, B., 1986. The rhizosphere. Springer -Valger. Berlin. 288 p.
- Dobereiner, J., 1961. Nitrogen–fixing bacteria of the genus Beijerinkia Derx in the rhizosphere of sugar cane. Plant Soil, 15: 211-217.
- Gardner, J.M., Chandler, J.L. and Feldman, A.W., 1984. Growth promotion and inhibition by antibiotic –producing fluorescent pseudomonades on citrus roots. Plant Soil, 77: 103-113.
- Gaskin M.H., Albercht S.L. and Hubell D.H., 1985. Rhizosphere bacteria and their use to increase productivity: A review. Agriculture, Ecosystem and Environment, 12: 99-116.
- Hart, S.C., Nason, G.E., Myrold, D.D., and Perly, D.A., 1994. Dynamics of gross nitrogen transformation in an old – growth forest: The carbon connection. Ecology, 75: 880-891.
- Klopper, J.W., 1993. Plant growth-promoting rhizobacteria as biological control agent. P .255-274. In: Meeting, F.B., Jr. (ed.) Soil microbial ecology –application in agriculture and environmental management..Marcel Dekker, New York.
- Klopper, J.W. and Schoth, M.N., 1978. Plant growth promoting rhizobacteria on radish. P. 879-882. in Pro. Internat .Conf. Plant Patho. Bact. 4th. Vol 2. Angers.France
- Klopper, J.W., Lifshitz, R. and Zablotowicz, R.M., 1989. Free living bacterial inocula for enhancing crop productivity. Trends Biotech, 7:39-44.
- Klopper, J.W., Lifshitz, R. and Bakker, P.A.H.M., 1992. Proposed elimination of the tern endorhizosphere. Phytopath, 82: 726-727.
- Kundu, B. S. and Gaur, A.C., 1980. Establishment of nitrogen fixing and phosphate solubilizing bacteria in rhizosphere and their effect on yield and nutrient uptake of wheat crop. Plant Soil, 57: 223-230.
-MacFadine, J.F., 1980. Biochemical tests for identification of medical bacteria. Second edition . Warley Press, Inc. U.S.A. 527 p.
- Mishustin, E.N., 1963. Bacterial fertilization and their effectiveness. Microbiol, 32: 911-917.
-Mohammad, G., and Parsad, R., 1988. Influence of microbial fertilizers on biomass accumulation in polypotted Eucalyptus camaldulensis Dehn. Seedlings. J.Trop.For, 4: 74-77.
-Quispel, A., 1988. Hellrigel and Wilfarth s discovery of nitrogen fixation hundred years ago. P 3-40 In Bothe, H. Nitrogen fixation: Hundreds years after .Proc.of .7th internat. Cong .N.Fix. Gustav Fischer , New York.
- Rovira, A.D., 1963. Microbial inoculation of plants. I. Establishment of free living nitrogen-fixing bacteria in the rhizosphere and their effects on maize, tomato and wheat. Plant Soil, 19: 304-314.
- Rovira, A.D., and Davey, C .B., 1974. Biology of the rhizosphere. P. 152-204. In: Carson, E.W. (ed.). The plant root and its environment . Univ. Press of Virginia. Charlottesville.
-Ryder, M.H., Stephense, P.M., and Bowen, G.D., 1994. Improving plant productivity with rhizosphere bacteria. Proc. of 3rd Internat. Work. PGPR.CSIRO Div. Soils, Adelaide Australia. 288p.
- Yahya, L.A. and ALAzawi, S.K., 1989. Occurrence of phosphate solubilizing bacteria from Iraq soils. Plant Soil. 17: 135-141.