CONTENTS 



1Q2 



Introduction 



Department of Agricultural Economics: 



The economic worth to growers of different varieties of apples 193 



Consumer demand for eggs l^o 



Changing methods of wholesale distribution of perishables 193 



Analysis of market prices for Massachusetts vegetables.. 194 



Recreational and forestry uses of land l"* 



Housing conditions and problems in part-time farming 194 



Factors affecting the price of eggs 194 



The relation of quaHty factors to price of eggs 194 



Competitive factors influencing the supply of market milk and cream 194 



Department of Agricultural Engineering: 



Investigation of apple storages 1"^ 



Fertilizer distributors 19^ 



Test of low-lift pumps 195 



Department of Agronomy: 



Pasture experiments 1"^ 



Legume variety tests 19" 



Field experiments with onions 19' 



Onion breeding 19' 



Field experiments with tobacco 19° 



Nitrogen metabolism in the tobacco plant 198 



Magnesium requirement of crops 199 



Method of applying fertilizer to corn 199 



Fertilizer ratios for grassland 199 



Nitrogen in golf green clippings 199 



Lawns and lawn gras.ses and management 199 



Department of Bacteriology: 



Nitrogen fixation in the presence of or as a result of legumes versus non-legumes 200 



Utilization of mannite by Azotobacter 200 



Influence of temperature on the nitrate content of soil in the presence of decomposing 



cellulose. 200 



Laboratory service -"1 



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 201 



Department of Botany: 



Tobacco black root-rot 201 



Brown root-rot of tobacco 202 



Onion diseases and the use of fungicides on onions 202 



Downy mildew of cucumbers 202 



Acetic acid and pyroligneous acid as soil disinfestants 203 



Eggplant wilt 203 



Strawberry gold disease 204 



Control of greenhouse vegetable diseases 204 



Carnation blight 205 



Monograph of the genus Pestalotia 206 



Forcing gladiolus with the aid of artificial light 206 



Eradication of nematodes in greenhouse soils by the use of chemicals 206 



Plant containers 206 



Influence of light quality on plant growth 207 



Plant diseases observed in 1931, not heretofore reported in Massachusetts 207 



LTnusual outbreaks of previously reported diseases 207 



The Cranberry Station: 



Injurious and beneficial insects affecting the cranberry 208 



Cranberry photosynthesis studies 209 



Weather observations 210 



Pump tests 210 



Cranberry varieties 210 



Cultivated blueberries ■■ 210 



