92 KANSAS ACADEMY OF SCIENCE. 
thorough hoeing. On the latter date some of the extra plants were pulled up 
and there were found several well defined nodules on the roots of those inocu- 
lated with soil, but none were found on any of the others at this date. On June 
22 it was noted that the beans inoculated with soil appeared to have a little 
larger growth. The difference was not very striking, however. On July 14 the 
yellow soys were in full bloom, but the medium green, being a little later variety, 
did not appear in full bloom until July 20. Measurements were taken for the ay- 
erage height of the plants on August 20, with the following results: 
TABLE I. 
Row 1. Row 2. Row 3. Ay. for plat. 
PLAT. = Fe 
1 Ae ge 8 | A | In Ft. | In. Ft. In 
fo al a oe 
Yellow Soy: | 
1 ER. SRP ite Ye ene KOE ann le en Pee ee 2 8.5 
1S Fee eine nk eae ae ti heat gi eR tg RE P22) 198 2 » P| ee 4.5 2 7.0 
Giemjos ecsieilecud cee eer eee eee a eae ae ne : Pe iad ett) ares neers 2 5.5 
Row 4 Row 5 Row 6. Av. for plat. 
Medium Green: l 
tO RR Re vee Are: KAS ee Pee tS Er RRA erie od le aed ee Po. 2 4.0 
Foie hola, tise deg elec es ae . 2 2 2 2 2 5 2 1.0 
te Lee eee Le ee Pr GORE Fe eee hee wads 2 0.0 
ee EEL eS te Le PSI Ee ee ce 
From the above table, it will be noticed that the yellow soy attained a greater 
height at this date than the medium green. This is due, however, to the differ- 
ence in the variety, the latter being a late-maturing and a somewhat more 
bushy plant than the yellow soy. It will also be noticed that, in case of plats B 
and E, rows 1 and 4, inoculated at time of planting, attained, on the whole, a 
little greater height than rows 2 and 5, and 3 and 6, inoculated subsequently to 
the time of planting. This would indicate that the best time to inoculate is at 
the time of planting. Furthermore, the last column of the table shows, in this 
case at least, that the plants inoculated with soil averaged a little greater height 
than the others. However, the differences above noted are not great, and, with 
the exception of the difference due to variety, would not be noticed by the ordi- 
nary observer without the application of a measuring-rod. 
APPEARANCE OF THE Roots.—On August 27 two hills each of the treated 
plats and one of the untreated were dug up, together with about a two-foot cube 
of the soil surrounding each hill. These were placed in large tubs of water and 
after a thorough soaking the roots were carefully washed out and examined for 
tupercles. The latter were found in great number and of a large size on the 
inoculated plants; but nota single tubercle could be found on the plants not 
treated, from either the yellow soy or the medium green, nor were there any signs 
of tubercles on the plants in the guard rows between the inoculated plats. The 
tubercles on the plants inoculated with soil were fairly uniform and situated 
mainly on the upper portion of the roots, not far from where the soil was placed 
at the time of planting. In case of the plants inoculated with extract there was 
a marked difference between the varieties; the tubercles on the yellow soy were 
very numerous and well developed, while those on the medium green were scanty 
and rather inferior. All the inoculated plants showed a greater diameter of the 
lower portion of the stem than the plants not treated. Pictures were taken of 
the different treatments and are here given. 
