CONTENTS 



Introducfion 232 



Department of Agricultural Economics: 



Consumer demand for eggs 233 



The econionic worth to growers of different varieties of apples 233 



Competition between apples and other fruits 233 



Part-time farming 234 



Recreational and forestry uses of land 234 



Factors affecting egg prices 234 



The relation of quality factors to price of eggs 234 



Competitive factors influencing the supply of market milk and cream 234 



Analysis of market prices for Massachusetts vegetables 235 



Department of Agricultural Engineering: 



Investigation of apple storages 235 



Fertilizer distributers 235 



Test of low-lift pumps 235 



Department of Agronomy: 



Nitrogen assimilation by grasses and clovers 236 



Ecological study of pasture vegetation 236 



Additional pasture experiments 236 



Legume variety tests 236 



Methods of applying fertilizer to corn 237 



Field experiments with onions 237 



Nitrogen assimilation by tobacco 238 



Field experiments with tobacco 238 



Magnesium requirements of crops 239 



Department of Bacteriology and Physiology: 



Nitrogen fixation in relation to leguminous crops 240 



Laboratory service 240 



The indol tolerance of the Colon-Aerogenes group of bacteria as a possible 

 means of differentiating fecal and non-fecal strains occurring in drink- 

 ing water supplies 241 



Department of Botany: 



Tobacco black root-rot 241 



Tobacco brown root-rot 241 



A seedbed and field survey of tobacco diseases in Massachusetts 242 



Onion diseases and use of fungicides on onions 242 



Onion blast 243 



Eggplant wilt 243 



Cucumber downy mildew 243 



Strawberry gold disease 1930 244 



Tomato leaf-mold 244 



Eradication of nematodes in greenhouse soils 245 



Ridding soil of the narcissus nematode 245 



Carnation blight 245 



Plant diseases not previously reported in Massachusetts 246 



Forcing gladiolus with the aid of artificial light 246 



The storage of gladiolus cornis 246 



Influence of light quality on plant growth 247 



The effect of decomposing paper on plant growth 247 



Chlorosis of snapdragon caused by an excess of lime 247 



The effect of temjierature on the nitrate content of the soil and plant growth 



in the presence of decomposing cellulose 248 



Temperature control tanks 248 



An electric steam generator for sterilizer retorts 248 



The Cranberry Station : 



Injurious and beneficial insects affecting the cranijerry 249 



Cranberry disease work 250 



Weather observations 250 



A'arieties 250 



Cultivated bhieberries 251 



