BN—29504 
In some experiments, grazing animals have been used 
to identify palatable plants and lines. At Lexington, 
Ky., dairy heifers grazed the tall fescue progeny on the 
left while avoiding the variety on the right. 
BN—29492 
Part of test plots at Prosser, Wash., used in research 
on the seed yield potential of grass and legume varieties. 
Genetic change attributable to environmental conditions 
and management practices are studied in_ these 
experiments. 
PER CENT 
40 
35 
30 
25 
Le PER CENT 
2 GERMINATION 
Dn 85-90% 
~ 
x 70-85% 
i) 
5 GHB Below 70% 
18 
10 
5 
~Y 
O ra Ae ad 3 ; 
194142 43 44 45 46 47 48 49 50 5! 52 53 54 55 56 57 58 59 606! 62 63 6&4 
Research at Corvallis, Oreg., on burning to control blind 
seed disease led to this remarkable improvement in seed 
quality. Between 1941 and 1949 (before burning to con- 
trol this disease), from 3 to 36 percent of the total 
perennial ryegrass crop had a germination below 90 per- 
cent; afterward, this fraction of the crop ranged from 
0 to 9 percent and essentially none of it was as low as 
70 percent. 
120 
SOUTH DAKOTA 
“a Fungicide 
Za 
E 100 not 
a Applied 
oe 
ah 80 
{e) 
jem 
F 60 
wn 
WW 
= 
> 40 
S See Fungicide 
Applied 
20 
fe) 
Early bud One-tenth Full bloom 10 days 
bloom (FB) ofterFB 
STAGE OF GROWTH 
Plant diseases influence plant composition. In this ex- 
periment, control of leaf diseases with fungicides lowered 
the coumestrol content of alfalfa. 
BN—29493 
Cages at Prosser, Wash., isolate insect-pollinated experi- 
mental lines. A hive of bees is provided in each cage for 
pollination. 
BN—29521 
Fungi carried inside seeds reduce stands and are a source 
of infestation to new seed crops. In research at Corvallis, 
Oreg., aerated steam has shown promise of eliminating 
these fungi. A, untreated cabbage seed; B, cabbage 
seed held at 130° F. for 20 minutes. Similar results 
were obtained with seed held at 130° for 40 and 60 
minutes, C and D. 
