RED-CLOVER SEED PRODUCTION. ra | 
This machine was so constructed as to give vertical strokes with a 
brush 4 feet wide and 6 feet long. The brushes could be removed 
with little trouble and replaced with others of a different type. Two 
types of brushes were used in these experiments. Brush No. 1 was 
composed of palmetto fiber, the bristles of which were rather stiff 
and of a dark reddish-brown color. Brush No. 2 was composed. of 
rice-root fiber of light color, somewhat more flexible than the pal- 
metto fiber. The plats treated were 12 feet wide and 100 feet long. 
The number of heads collected from each plat represents the num- 
ber contained within two hooped areas. These hooped areas were 
obtained by sailing a hoop into the air so that it would light on a 
particular plat. Since each plat contained a uniform stand it was 
thought that by this method heads would be selected which would 
be representative of the entire plat. Table V shows the results 
obtained in these experiments. 
TasLe V.—Average seed yield of red clover on plats which were given various treatments 
with a cross-pollinizing machine. 
Treatments. 
> No. Brush Times Time Time amber cote ee 
used. /goneover.| between. | of day. peels 
given. 
Days. 
TELE 9 Sask ea ll a ae No. 1 1 1| A.M 7 460 63.3 
IPE Wace, oS Soe eae eee tae Ne Yo. 1 2 1 | eAt Mee a 424 59.4 
TRIER Sytem eh aN eer Noslee=e At 3 Wiles ese 4 499 64.2 
late Check = sss. ee see ios ee recto ese ee S| (Se eee ee ere Ses | Se een eee 490 65.1 
IP 5. DaseSeeee Sc temas eens IN(Oe dee sal 2 33] wale Wiles ee 4 414 59.2 
Pal Sipe Ose easy aes ea oe NOE Lee 3 3 | A. M. 4 458 70.3 
IPIRWE* 75 GIGOKX. Sseuaceseaceuoass |toaseosnes SeesoHaens | SSLcessorel Seean aes Eeaaeenmeets 582 66.7 
ate epics ae cee cee eee ee INEZ 5e6e 3 S| je Ac a Mic = 4 | 527 70.9 
Pig. O Sas Cry estes = sas FINI llssse 3 Sisley Mere 4 | 487 64.7 
iPlatlOnehetkeamctesa: sea eee [eae aa lee tieocrd| sas. a5 5 = ee Gees ecco ate 655 64.0 
12H 5 LG es Serer aa ee ere eee rere INOH2ES== 3 3) dees See 4 492 67.4 
It will be seen from the above experiments that the treatments 
with brush No. 1 decreased the yield 1.9 seeds per head, while the 
plats treated with brush No. 2 gave an increased yield of 3.9 seeds 
per head over the average of the check plats. 
EFFICIENCY OF DIFFERENT HAND-OPERATED BRUSHES AS MECHANICAL CROSS- 
POLLINATORS OF RED CLOVER. 
In order to test the efficiency of hand-operated brushes as a means 
of mechanical pollination of red clover, eight pairs having different 
types of bristles were used. The different pairs were labeled A, B, 
C, ete., for convenience in reference. Following is a brief descrip- 
tion of the different pairs of brushes used: 
(A) Rice-root fiber, somewhat stiff; bristles about 2 inches long and nearly erect. 
(B) Rice-root fiber, similar to A, but with bristles 3 inches long, somewhat coarser 
and more spreading. 
(C) Tampico fiber, finer but stiffer than the rice-root fiber in brushes A and B, 
(D) Wire-bristle hairbrushes, 
