CONTENTS 



Page 



Introduction 300 



Department of A^zricultural Economics 301 



Taxation of farm property 301 



Part-time farming 301 



Competitive factors influencing tlie supply of market milk and 



cream in Massaciiusetts 302 



The consumer demand for apples 302 



The economic worth of different varieties of apples .302 



The supply and market distribution of Massachusetts poultry 

 products. The nature of the consumer demand for poultry 



products 302 



Prices of eggs and poultry products 302 



Department of Agronomy 303 



Tobacco investigations 303 



Cropping systems 303 



The influence of dift'erent crops on yield and quality of tobacco 303 



Field study of tobacco problems in Massachusetts 303 



The effects of high applications of acid phosphate on tobacco 303 

 The amount of nitrogen usually required to grow tobacco 



successfully 303 



The form of nitrogen which produces the best yield and quality 



of tobacco 303 



The relation of form of nitrogen to root-rot of Havana tobacco 303 



The eft'ects of inorganic and organic toxins on tobacco 304 



Onion investigations 304 



The role of organic matter in the production of onions 304 



Lime in relation to onion growth 304 



Comparison of fertilizers containing amounts of nitrogen phos- 

 phoric acid and potash for onions 304 



Onion breeding 304 



The cause of a chlorosis of corn 304 



The relative eft'iciency of based and unbased sulfate of ammonia 



as carriers of nitrogen 304 



Alfalfa varieties 304 



Ecological study of pasture vegetation 304 



The nitrogen intake of certain grasses and clovers 304 



Department of Bacteriology and Physiology 305 



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



defined agronomic conditions 305 



Laboratory service 305 



Department of Botany 306 



Tobacco diseases 306 



Black root-rot 306 



Brown root-rot 307 



Control of diseases of greenhouse vegetables 308 



Cladosporium leaf mold of tomatoes 308 



Powdery mildew of cucumber 309 



Downy mildews of cucumber and lettuce 309 



Eradication of nematodes and parasitic fungi in greenhouse soils 310 



The rest period of gladiolus 310 



Carnation blight 311 



Eggplant wilt 31 1 



Fungous parasites of grasses 312 



A leaf-spot disease of Chinese cabbage 312 



Other activities 312 



The Cranberry Station 313 



Injurious and beneficial insects affecting the cranberry 313 



Cranberry disease work •_• 314 



Weather observations with reference to frost protection 315 



Blueberry investigations 315 



Weeds 316 



The relationship of weather to cranberry productiveness 316 



Varieties 



316 



