MICHIGAN ACADEMY OF SCIENCE. 
69 
Mr. Potts, the station foreman, noted a great variation in the number 
and size of the nodules on the several plots, although the seed had not 
been inoculated, and although the ground had never borne soy beans be¬ 
fore. Below are given the kinds of fertilizer used and the number of 
inoculated plants, or at least the number of plants bearing nodules out 
of a hundred plants examined, on each plot. Sometimes the nodules 
were single, large and close to the main stem of the plant. Sometimes 
there were a multitude of small nodules scattered along the roots and 
rootlets like pearls on a string. 
Soy Beans after Cow Peas. 
Plot 1. Leached ashes, 24% of plants infested with nodules, usually 
one nodule per plant and that on the main stem and large. In one 
case only, were there small nodules resident on the smaller side roots, 
six cases of small nodules on main stem. 
Plot 2. Sand an inch deep over surface of muck and harrowed in; 
37% of plants bore nodules, sixteen with nodules on side roots and 
twenty-one with nodules on main root. These nodules were invariably 
large and attached closely for the entire length of the nodule to the 
main stem. The surfaces of these nodules were also reticulated, a net 
work of white ribs over a dark background. Occasionally, on this plot 
there would be a string of large nodules on some side root, similar to 
the large ones on the main root. These nodules would be reniform or 
spherical and varying from a quarter of an inch to three-eights in 
