INDEX. 



175 



Lime, methods and quantity of application 



Manure economy tests ...... 



Meteorological observations, sunmiary for 1921 

 Meteorological studies: 



Area of late frosts as shown by insect distribution 

 Frost prediction ...... 



Recording of data ...... 



Milk, microbiological investigations 



Nitrogen fertilizers, comparison .... 



Nutritive value of cattle feeds .... 



Onion diseases ....... 



Onion maggot, control ...... 



Onion smut fungus, development and pathogenesis: 

 Germination of the spores .... 



Comparison with the process in other species of Urocystis 

 Comparison with the process described by Thaxter 

 Essential conditions ..... 



Process of germination .... 



Review of literature on essential conditions for smut spore germina 

 tion ....... 



Incubation period ...... 



Absorptive hyphal expansions 



Haustoria ....... 



Infection of new leaves .... 



Young hyphoG in the intercellular spaces 

 Infection ....... 



Character of the inoculum .... 



Development of the onion seedling 



Method of entrance ..... 



Multiple infection ..... 



Passage through epidermal cells 



Period of susceptibility .... 



Point of infection ..... 



Introduction ....... 



Literature cited ...... 



Saprophyti.sm ...... 



Cultural characters ..... 



Effect of freezing the cultures 



Fate and function of the detached hyphal cells 



Isolation ....... 



Life in the soil ...... 



Microscopic characters of the mycelium in culture 

 Summary ....... 



Sporogenesis ....... 



Summary ....... 



Onions, methods and cost of distribution 

 Orchard management: 



Clover V. grass in a sod mulch orchard 



Cover crops, test of ..... 



Cultivation v. sod mulch in a bearing orchard 

 Fertilization ....... 



Fertilizers in a sod mulch orchard 

 Nitrate of soda, test of different amounts . 

 Pasture vegetation, ecological study 

 Peaches, genetic composition ..... 



PAGE 



12a 

 13a 



76a 



32a 

 33a 

 32a 

 31a 

 11a 

 1.35 

 23a 

 19a 



100 

 110 

 111 

 104 

 108 



100 

 12.5 

 127 

 126 

 128 

 125 

 118 

 123 

 118 

 123 

 125 

 124 

 120 

 122 

 99 

 132 

 112 

 112 

 115 

 116 

 112 

 117 

 115 

 117 

 128 

 131 

 32a 



14a 

 15a 

 14a 

 15a 

 14a 

 15a 

 1.3a 

 18a 



