Radiation Resistance of Soil Azotobacter.

Nitrogen fixation capacity of Azotobacter spp. strains isolated from soils in different ecosystems and relationship between them and the microbiological properties of soils.

The objectives of this study were to count and culture Azotobacter spp. in sampled soils, to determine the nitrogen (N) fixing capacity byAzotobacter spp. in pure culture and different soils, and to explore the relationships between N fixation capacity of Azotobacter spp. and microbiological properties of soils in Northern Anatolia, Turkey. Statistically significant relationships were found bet...

EFFECT OF INOCULATING A SOIL WITH AZOTOBACTER UPON PLANT GROWTH AND NITROGEN BALANCE ' By P. L. GAINEY Soil bacteriologist, Kansas Agricultural Experiment Station INTRODUCTION

In 1923 a 20-year experiment was begun in an effort to gain information on the following points: (1) The factors that influence the longevity of Azotobacter when introduced into a soil from which it is normally absent; (2) the effect of introducing and maintaining an Azotobacter flora in such a soil upon the crop-producing abihty and the nitrogen balance of the soil. The recent comprehensive su...

The Production of Fragile Cysts by an Aberrant Strain of Azotobacter Chroococcum Isolated from Soil

Potential of Plant Growth Promoting Rhizobacteria and Chemical Fertilizers on Soil Enzymes and Plant Growth

The present investigation deals with the role of Plant Growth Promoting Rhizobacteria and chemical fertilizers alone or in combination on urease, invertase and phosphatase activities of rhizospheric soil and also on general impact on growth of safflower cvv. Thori and Saif-32. The PGPR (Azospirillum brasilense and Azotobacter vinelandii) were applied at 10cells/mL as seed inoculation prior to s...

Technique for isolating phage for Azotobacter vinelandii.

An enrichment technique was developed whereby azotophage could readily be isolated after inoculation of soil sites with Azotobacter vinelandii.