Vol. XXVIII 
JUNE I4*L 1924 
No. II 
JOURNAL OP 
AGRICULTURAL 
RESEARCH 
CONTENTS] 
him^AWv~] 
...., ... , \ ff) -pi 
On Some Plant Parasitic Nemas and ReUt^Forms f *•- '-T 
Tite Influence of Environment on S« in Hemp, CamwWf satifa L.^ * - W t' v ‘ v : ! " ‘ini" 
RUOB C. McPSEB' fj***,^ ; | 
Spacing Experiments with Acala.Cotton in Southern' Calfonrt?"* 
H. G. McKgEVER 
Correlation Among Quantitative Characters in Maize - ’ - 
• J. H. KEMPTON 
Effect of Fumigation upon Heading of Grain Caused by Insects 
E. A. BACK and B, X. COTTON 
Tfec Nitrification of Phosphorus Nitride - ' - 
: f . e. All ISON 
Aeesal Stages of the Leaf Rusts of Rye, Puccinia dispetsa Erikss. and Here in,-? of 
Barley, P. anomala Rostr., in the United States - - - ' _ ; 0 > f nd 
. • E. B. MAINS and H. B. JACKSON 
Fall Sowing and Delayed .Gemination of Weiftern White Pine Seed • - - 1 
■». G. WAHiENBKRG 
The European Hare (Lepus europaeus Pallas) in North America - 
' JA«fB$,SHV£E ' ' ■ ( . - 
Growth on. Cut-Over and Virgin Western Yellow Pine Lands in Centra 1 Idaho - H30 
C.E.KORSTIAN . ‘ - ’ 
Some Factors Affecting Reproduction after Logging in Northern Idaho 
J. A. LARSEN 
- - 1095 
- 1103 
- 1117 
.1119 
-1127 
1133 
T m !dl Ct 6f ^ yftMa _ rnid !“ d Related Compounds on the Number of MicroQrganisms , . 
- 1149 
1159 
PUBLISHED BY AUTHORITY OF THE.SECRETARY OF ACF.5CDLTi.iRE ' 
JV1THTOE COOPERATION OF THE ASSOCIATION- 
OF LAND.GRANT COLLEGES ’ ; 
WASgnsGTour, p. c. . 
OOV¥RKMBRT>EINTmG OFWCE 
