1. The influence of organic and mineral fertilizers upon the behaviour of Azotobacter and the possibility of its quantitative determination;Ahrens;Zentralbl. Bakteriol.,1963
2. Effect of heavy doses of ammonium sulphate on the microflora of soil and the rhizosphere of Ragi (Eleusine coracana Gaertn;Bagyaraj;Mysore J. Agri. Sci.,1966
3. A diffusion and massflow concept of soil nutrient availability;Barber;Soil Sci.,1962
4. On the mechanism governing nutrient supply to plant roots growing in soil;Barber;Trans, 9th Int. Congr. Soil Sci.,1968
5. Studies on nitrogen-fixing bacteria of the genus Beijerinckia 2. Mineral nutrition and resistance to high levels of certain elements in relation to soil type;Becking;Plant & Soil,1961