[Results of the use of lithium to prevent recurrence of affective psychosis]. / Ergebnisse der Lithium-Rezidivprophylaxe affektiver Psychosen.

The efficacy of lithium treatment in preventing relapse in phasal psychoses was tested by the re-examination of 99 patients at a Dresden clinic whose treatment had on average exceeded ten years. Results and progress were compared with those of patients starting treatment since the introduction of the lithium treatment in the year 1979. Phase or subphase frequency and duration, conditions of treatment, suicide attempts, unfitness for work, and registration as a disabled person were among the aspects considered.

[Influence of straw manuring on the qualitative properties of the organic soil substances of a Lehm-Braunschwarzerde (author's transl)]. / Zum Einfluss einer Strohdüngung auf die Qualitätseigenschaften der organischen Bodensubstanz einer Lehm-Braunschwarzerde.

It is reported on the influence of a long-term field trial with straw manuring at different terms and different nitrogen fertilization steps on the qualitative properties of the organic soil substance. Straw manuring in autumn increased the carbon content in the soil. Increasing amounts of nitrogen intensified this effect. Straw manuring in spring only with simultaneously applied quantities of 100 and 200 kg N/ha, respectively, brought about an increased content of organic substances in soil. With straw manuring in autumn, fractionation of the organic substance in soil showed a smaller amount of humic acids. Increasing nitrogen addition reduced this amount still more than in the plots with straw manuring in spring. The quota of fulvic acids increased. Therefore, the higher content of organic substances, obtained with straw manuring in autumn, is based on an increase of the pre-stages of humic acids and non-humic matter.

[Influence of straw manuring on the biological activity of a lessivé chernozem (author's transl)]. / Der Einfluss von Strohdüngung auf die Atmungsintensität einer Lehm-Braunschwarzerde.

In a long-term experiment, the influence of straw manuring in spring and autumn on the biological activity of a lessive chernozem soil was examined. The quantity of carbon dioxide, evolved by the plots during May and June, showed an increase in soil respiration by straw manuring. Increasing amounts of nitrogen, given together with straw, had no significant influence on the quantity of carbon dioxide evolved. The base respiration, however, showed increasing rates proportional to increasing amounts of nitrogen. The variants manured with straw in autumn were superior to those manured in spring. For covering the efficiency of soil respiration, the field method applied noes not seem suitable. With high N-supply (200 kg/ka), the relative respiration rates show good stability of the organic substance, present in soil. This stability is higher with straw manuring in spring than in autumn. Straw supply in autumn influences the yield more favourably. Direct relation between the quantity of carbon dioxide evolved and yield cannot be inferred.

[A long-term experiment on the complex influence of cultivating, fertilizing, and crop rotation measures on humic substances in soil and development of yield (author's transl)]. / Uber den mehrjährigen komplexen Einfluss von Bearbeitungs-, Düngungs- und Fruchtfolgemassnahmen auf den Humuszustand des Bodens und die Ertragsbildung.

In a 10-year field experiment, the influence of fertilizing, cultivating, and crop rotation measures on the C-content of the soil, humus quality of the organic soil substance, and the yield was investigated. With cultivation of fodder plants only, the C-content of the soil can be improved by increased mineral and increased organo-mineral fertilization at any depth of cultivation. When in the same location there was a turn between cereals and green crops, a decrease of C-rate can only be prevented by increased organo-mineral fertilization. Continuous cultivation of root crops resulted in a decrease of the C-content. Deeper tillage of the soil generally decreased C-content. Within the years, a variability of the pure humin substances could be detected, depending on the rotation of crops and C-content. The composition of the fulvic acids is differentiated in dependence on the factors "time" and "cultivation". The effect of fertilization variants on the yield was different. Fertilization in that location with manure only, compared with mineral fertilization, caused in most cases depression in yield. Decrease on yield by deeper ploughing had the least influence with root crops.