DR. A. B. STEWART, deputy director of the Macaulay Institute for Soil Research, Aberdeen, has been granted leave of absence for six or seven months to advise the Government of India upon the organization and conduct of research and field experimentation upon problems of soil fertility and crop production. Dr. Stewart has in recent years devoted much time to problems of soil fertility in relation to both plants and animals.

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    Announcements. Nature 156, 566 (1945).

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