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Some Effects of Liming, Fertilization, and Soil Moisture on Seedling Growth and Nodulation in Birdsfoot Trefoil¹

Synopsis: The pH limits for nodulation were 4.5 and 7.9. However, growth and survival of the seedlings, as well as subsequent nodulation, were satisfactory only in a pH range of 6.2 to 7.5. Nodulation was retarded and depressed more than top or root growth by various liming and fertilizer treatments and by inadequate soil moisture. Nodulation may be retarded or completely inhibited on soils subjected to desiccation or to alternating periods of moisture and drouth.

² Assistant Professor of Agronomy.

Received for publication October 31, 1960.