CONTENTS. y 



Department J3iiletik No. 972. — Unit Requirements for Prodictng 



Market Milk in Eastern Nebraska: Page. 



Character and scope of the work 1 



Methods of obtaining data 2 



Influence of seasons on cost factors 2 



Description of herds 3 



Requirements for producing milk 3 



Credit for calves 6 



Credit for manure 7 



Requirements for keeping a bull S 



Factors involved in the production of milk 



Feed 9 



Pasture 10 



Labor 10 



Other costs 11 



Percentage comparison of factors involved in milk production 12 



Average compared with bulk-line costs 13 



Monthly distribution of factors in milk production 15 



Summary 15 



Department Bulletin No. 973. — Milk-plant Operation: 



The need of technical knowledge 1 



Receiving milk at the plant 2 



Grading, sampling, and testing 3 



Pasteurizing and cooling 4 



Control of pasteurizing temperature 5 



Checking accuracy of holders : 6 



Cooling 7 



Bottling and capping 7 



Man-hour reciuirements for bottling milk 7 



Comparison of labor costs in filling and capping by various methods. . 11 



Washing bottles 16 



Man-hour requirements for washing bottles 18 



Comparison of costs in washing bottles 20 



Washing cans 25 



Sanitation in city milk plants 25 



Wastes incurred in handling milk 28 



Milk-bottle losses 29 



Goods returned from delivery routes 32 



Shrinkage in handling milk 33 



Checking milk through the ])lant 34 



Checking goods handled at plant 34 



Checking the driA^er 36 



Checking the receiving and shipping clerks 36 



Number of men required to operate milk plants 38 



Systems of buying milk 39 



Disposal of surplus milk 42 



Manufacturing of by-products 44 



Weights of milk and cream 44 



Department Bulletin No. 974. — Directions for Blueberry Culture, 1921: 



Early experiments with blueberries 1 



Special reciuirements 2 



Importani e of superior varieties 4 



Propagation 6 



Budding 6 



Stum])ing S 



Soil mixtures for blueberries 9 



Tubering 10 



Winter cuttings I? 



Root cuttings 14 



Mor nd layering 15 



Treatment of young planfs 15 



Field planting 16 



Yield ^ 22 



Plybrid blueberries 23 



Conclusions 'P4 



