DAIRY HUSBANDRY 



Persistency of Milk Yield Is Influenced by Certain Factors 22 



Sex Ratio in Dairy Cattle Is Not Influenced by Normal Herd Management 



Practices , 22 



The Vitamin D Content of Forage Varies Greatly 22 



Sulphur Dioxide Excells Molasses as a Silage Preservative 23 



Digestibility and Utilization of Protein in Mow-Cured Hay Superior to That of 



Field-Cured Hay 23 



Too Much Limestone Lowers Digestibility of Both Protein and Energy in Silage 24 



Influence of the Ration on Vitamin Synthesis in the Rumen 24 



Does Sulfur Dioxide Affect Vitamin Synthesis in the Rumen? 24 



Rumen Microorganisms 25 



Dairy Heifers Make Greater Gain on Grass Silage 25 



How Does the Cow Use Sulfur from Sulfur Dioxide Silage 25 



Minor Element Content of Forage Can Be Reduced by Heavy Fertilization .... 26 



A Container for Carrying Bull Semen 27 



Other Active Projects 27 



ENTOMOLOGY 



Search for Synergists Continues 27 



Field Tests with Newer Insecticides 27 



Spruce Insects 28 



Distribution of Blood-Sucking Diptera and Tricoptera 28 



Other Active Projects 28 



FORESTRY 



Tree Thinning with Chemicals 28 



Other Active Projects 29 



HORTICULTURE 



Varieties of Tree Fruits That Hold the Spotlight 29 



Fruits for Northern New Hampshire Are in Prospect 30 



Grape Vines Should Be in Every Home Garden 30 



Pear Breeding 31 



Late-Ripening Strawberries Selected 31 



Grape Breeding 31 



Peach Breeding 31 



Rubus Breeding 31 



A New Strawberry Variety 32 



Sawdust Added to Soil Has Not Increased Yields ', 32 



Mowing Orchard Cover Conserves Moisture 32 



Deer Damage 32 



Durham Raspberry Culture 32 



High Ascorbic Acid Tomatoes 33 



Carrot Breeding 33 



Sweeter Table Beets 33 



Breeding Snap Beans 33 



Chinese Cabbage, Cabbage, and Rutabaga Combined 33 



Phosphorus Needed for Quality Lettuce 34 



Beneficial Effects of Hay Mulch 34 



Radioactive Phosphorus Is a Tool for Testing Uptake of Phosphorus Fertilizer 



by Apple Trees 34 



3 



