Manganese in relation to photosynthesis - II. Redox potentials of illuminated crude chloroplast suspensions

[No abstract available]

Manganese in relation to photosynthesis - III. Uptake of oxygen by illuminated crude chloroplast suspensions

Manganese in relation to photosynthesis - I carbon dioxide assimilation and the typical symptoms of manganese deficiency of oats

The influence of microorganisms on the phosphate intake by the plant

Introduction. The way in which insoluble phosphates are absorbed by the plant is still a matter of some doubt. It is generally accepted that the carbonic acid, excreted by the plant roots, is capable of bringing insoluble phosphates into solution.

On the use of aspergillus niger for the determination of plant nutrients in the soil

For the determination of potassium and phosphate by means of Aspergillus niger, an optimal culture solution was developed, which was sufficiently buffered to keep the PH changes between allowable limits, which was not influenced by the humus-content of the soil, nor by the presence of calcium and sodium salts. With this solution and a newly...