Comparative Efficiency of Liquid and Peat‐Base Inoculants on Field‐Grown Soybeans (Glycine max)1

Synopsis Both types of inoculant were effective when the seed were planted 1 day after inoculating, but when seed were held for 7, 14, or 21 days before planting, the peat‐base inoculant proved superior in bringing about effective nodulation and higher yields. The efficiency of the liquid inoculum for preinoculating soybeans was not improved appreciably by increasing the number of rhizobia 2½ times. Possible explanations of the superiority of the peat base inoculum are discussed.