Nebraska Agricultural Exp. Station, Research Bui. 6. 
.5 a 
O bfi 
03 
0 o 
1 & 
Eh 
.5 o 
cow w^oocohoh 
Oit-ooTt<ooTj<a}i-it~ 
(MHNO)lOHt>lOiC 
OHHt-lOHOWO 
00 5DHOt>HHtOCO 
03 
o 
o be 
03 
c o. 
— 3 
o o 
£ be 
St 
.s § 
05 000MWOOQOU5 
?ooiMait>qiO(>jH 
HdlCt>d6ri|>05 
OJ CO O ?C H Oi o 
TfNHOWCOMOOH 
i— I t-H CM i— I i-H f-H 1— I T— I 
: § 6 8 
. S g g 
-^.S e3 a h 
to a; "7? 03 
e« g «s w O a> 
^5 > o ™ ^ 3 
ih 00 j_ 03 Q) Q) Q) 
o o o'S^ £ aGQ 
-C*^ ^ -JS «JL a> a> <x> 
'S'S'S-S 3 3 3 
^_k^K^03 03 CS 4J 4J 
bbb-g^-g * * * 
QQQEhEhH^^^ 
