20 
BULLETIX 1343, U. S. DEPARTMENT OF AGEICULTUEE 
RATE-OF-SEEDING EXPERIMENTS 
The lowar oat was grown in rate-of-seeding experiments dur- 
ing the five 3'ears 1917, 1918. 1920, 1921. and 1922. and the annual 
and average viekls obtained in these experiments are given in 
Table 14. 
The data presented in Table 14 show that the highest net average 
yields have been obtained from seeding at a rate of 4 bushels to the 
acre. This is a higher rate than has proved profitable with other 
varieties previously grown 
in such experiments. The 
results indicate that a rate 
of more than 3 bushels is 
advisable for this variety. 
lOGREN 
logren is the fourth im- 
portant pure-line oat de- 
veloped in and distributed 
from the cooperative cereal 
experiments at the Iowa 
Agricultural Experiment 
Station. For many years 
the parent variety, Green 
Russian, has been one of 
the leading varieties in 
northwestern Iowa. The 
Fig. 12. — Diagram showing tlie mean acre yields pvtPTit nnrl rlpncsitv of thp 
(in bushels of lowar as compared with those of ^. *- .; '^.^^ ^^^^.V ^^ }^^^ 
Richland as a standard oat variety in 42 ti'iaJs on distribution ol tlllS varietv 
Iowa farms during the five-year period from 1919 •_ 1 01 a , ^4-,.:i^^ ^il^ 
to 1923, inciusiver m 1919 are strikingly 
shown in Figure 13. The 
fact that the Green Russian variety has persisted in that section 
of Iowa indicates its excellent adaptability to existing soil and 
climatic qonditions. For this reason the development of logren, a 
uniform high-yielding strain of the Green Russian type, seemed 
particularly desirable. The history of the logren and its description 
follow. 
HISTORY AND DESCRIPTION 
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History. — The logren was developed from a single head of the 
Green Russian variety obtained from W. Eral, Pocahontas, Iowa. It 
was grown in a head row at the Iowa station in 1911 and was desig- 
nated Iowa Xo. 840. The selection was grown in the nursery experi- 
ments in 1912, 1913, and 1914, and was advanced to the plat experi- 
ments in 1916. logren was first distributed to farmers in Iowa in 
1922. 
Description. — Early growth erect ; plant midseason. Culms mid- 
sized, stiff, glabrous or slightly hairy at the nodes, 80 to 130 centi- 
meters tall. Sheaths deep green, usually glabrous; culm leaves mid- 
sized, margins usually glabrous. Peduncle midsized, straight, well 
