CONTENTS 



Introduction 328 



Department of Agrricultural Economics : 



Consumer demand for apples 329 



The economic worth of different varieties of apples - 329 



The nature of the consumer demand for poultry products 329 



Part-time farming 329 



Prices of eggs and poultry products 329 



The study of competitive factors influencing the supply of market 



milk and cream in Massachusetts 330 



Department of Agricultural Engineering: 



Investigation of apple storages 330 



Fertilizer distributors 331 



Department of Agronomy: 



Nitrogen assimilation by Havana tobacco 331 



Relation of the form of nitrogen to root-rot of Havana tobacco 331 



Nitrogen assimilation by grasses and clovers 332 



Ecological study of pasture vegetation 332 



Alfalfa variety tests 332 



Tests of varieties of soy beans and field peas 332 



The value of cover crops for onions 333 



Sulfate versus muriate of potash for onions 333 



Lime in relation to onion growth 333 



Fertilizer ratios for onions 334 



Onion breeding 335 



Influence on onions of rate of seeding and spacingbetween rows 335 



Relation of aluminum compounds to the ill effects of certain crops 



when grown in rotation 335 



Quantity of nitrogen and phosphorus for tobacco 337 



The magnesium requirement of certain common crop plants 338 



Department of Bacteriology and Physiology: 



Nitrogen-fixation in relation to legumes and non-legumes under defined 



agronomic conditions • 338 



Laboratory service ^39 



Studies on the indol tolerance of the Colon-Aerogenes group of 

 bacteria as a possible means of differentiating fecal and non- 

 fecal strains occurring in drinking water supplies 340 



Department of Botany: 



Tobacco diseases 340 



Black root-rot 340 



Brown root-rot 341 



Control of diseases of greenhouse vegetables 341 



Leaf-mold of tomatoes 341 



Downy mildews of cucumber and lettuce 342 



Eradication of nematodes in greenhouse soils - 342 



Eggplant wilt • 343 



Onion blast 343 



Carnation blight 343 



Forcing gladiolus with the aid of artificial light 343 



Influence of light quality on plant growth 344 



The effect of pot structure on soil temperature 344 



The Cranberry Station: 



Injurious and beneficial insects affecting the cranberry 345 



Cranberry disease work 3'*-'' 



Weather observations with reference to frost prediction 346 



Varieties 346 



