Magnesium as a factor in nitrogen fixation by soybeans

Publication authorized July 1, 1938.Includes bibliographical references (page 30)

Copper and Cobalt contents of twenty-six soil types.

"The material of this bulletin was taken from the thesis presented by F.R. Johnson for the degree of M.A., University of Missouri, February, 1950. It is a report on Department of Soils Project Number 51 entitled 'Fertility level of soils'"--P. [3].Includes bibliographical references (pages 15-16)

Fertility levels of Missouri soils

Cover title.Includes bibliographical references

Soil magnesium and the growth and chemical composition of plants

A report on Department of Soils Research Project No. 207, 'Soil fertility'--P. [2].Digitized 2007 AES.Includes bibliographical references (page [20])

Removal of radioactive fission products from surface water supplies

Also available online.Digitized 2007 AES

Potassium-bearing minerals as soil treatments

Digitized 2007 AES.Includes bibliographical references (page [2])

An explanation of theory and methods of soil testing

Cover title.Includes bibliographical references