CONTENTS. 



PAGE 



Organization of the Station n 



Announcements Vii 



Fertilizer experiments on apple trees (Bulletin 246) 2 



Acid phosphate and Florida rock as a fertilizer for oats (Bulle- 

 tin 246) 4 



Commercial varieties of oats at Aroostook Farm (Bulletin 246).. 6 



Commercial varieties of oats at Highmoor Farm (Bulletin 246).. 8 

 Tests of new varieties of oats originated at Highmour Farm 



(Bulletin 246) 10 



Rate of seeding oats in Aroostook County (Bulletin 246) 12 



Plant food in Aroostook soils (Bulletin 246) 14 



Effect of omitting potash fertilization upon the potato crop 



(Bulletin 246) 16 



Method of application of fertilizer upon potatoes (Bulletin 246) IQ 

 Sulphate of ammonia compared with nitrate of soda as a source 



of nitrogen in potato fertilizers (Bulletin 246) 22 



Preparing land with dynamite (Bulletin 246) 27 



Are sheep profitable in Maine (Bulletin 246) • 30 



Report of Jersey Sires futurity test (Bulletin 247) t>7 



Life histories of leaf hoppers of Maine (Bulletin 248) 53 



Six years of experimental apple spraying at Highmoor Farm 



(Bulletin 249) 81 



Studies on oat breeding. IV-Pure line varieties (Bulletin 250) . . 97 



Control of apple maggot by poisoned bait spray (Bulletin 251).. 149 



Spraying experiments and apple diseases in 1915 (Bulletin 252).. 169 



Syrphidae of Maine (Bulletin 253) 193 



Studies of life histories of frog-hoppers of Maine (Bulletin 254) 265 



Dwarf eggs of the domestic fowl (Bulletin 255) 289 



Elm leaf rosette and wooly aphid of the apple (Bulletin 256") 329 



Abstracts of Station publications in 1916 not included in Bulletins 



or Official Inspections (Bulletin 257) 345 



Meteorology (Bulletin 257) 357 



Report o the Treasurer (Bulletin 257) 359 



Index for 1916 (Bulletin 257) 362 



