(1) Handbuch der landwirtschaftlichen Bakteriologie (2) Landwirtschaftlich-bakteriologisches Praktikum

Abstract

AS the fertility of virgin soils becomes exhausted and the world's population increases, man will become more and more dependent on artificial methods for increasing the fertility of the soil and on intensive cultivation. Research during the last twenty years has shown how important lowly forms of life are in these connections. The microbiologist has already indicated that, for instance, by increasing the nitrogen-fixing micro-organisms in the soil by inoculation, or by partial sterilisation whereby forms inimical to them may be destroyed, much may be done to increase the yield of crops without the actual addition of plant-food elements by means of manures.

(1) Handbuch der landwirtschaftlichen Bakteriologie.

By Dr. F. Lhnis. Pp. xii + 907. (Berlin: Gebrder Borntraeger, 1910.) Price 36 marks.

(2) Landwirtschaftlich-bakteriologisches Praktikum.

Anleitung zur Ausfhrung von landwirtschaftlich-bakteriologischen Untersuchungen und Demonstrations-Experimenten. By Dr. F. Lhnis. Pp. vii + 156. (Berlin: Gebrder Borntraeger, 1911.) Price 3.40 marks.