May, 1921] BIENNIAL REPORT. 13 



nary tillage methods in New Hampshire orchards has been established beyond 

 question in this experiment. 



There were no insect outbreaks in this orchard this season, and both aphis 

 and red bug, which have been troublesome in some seasons, were entirely under 

 control. The latter part of the season, however, showed a decided outbreak 

 of the New Hampshire Baldwin fungus spot (Brookes), which marred the 

 appearance of the fruit attacked. This is the second time in the past eight 

 years that this disease has been present in sufficient amount to cause damage. 

 For a summarized statement of the results of this experiment, the reader is 

 referred to Station Bulletin No. 190. 



The sub-project, "Relation of Light to Fruit Production," has been pursued 

 and extended this year in co-operation with the Chemistry Department, and 

 has been reported by that department. 



Ringing. — In order to obtain data on the changes within the tissues of a 

 fruiting and non-fruiting tree, some trees were ringed in May of 1919 and 1920 

 in order to secure material for this purpose. The trees used in 1919 were young 

 and undernourished, so that the ringing resulted in the death of part of them, 

 while those remaining alive bloomed quite full and afforded material for analy- 

 sis. The trees were better selected in 1920, and in the fall showed every evi- 

 dence of being full of fruit buds and the trees in good condition. 



Squash Breeding Experiment. — -The material used up to 1920 was apparently 

 impure, and the experiment was started over again along different lines in the 

 spring of 1920, with a view toward selection of pure and early strains of certain 

 ones of our commercial squashes, particularly Delicious and Hubbard. No 

 data are at present available. 



RESULTS OF WORK IN HATCH PROJECTS. 

 Agronomy Department. 



Timothy Selection. — This work, which has been in progress for several years, 

 was continued last season by setting out 2000 new plants in hills 3 feet apart 

 each way. These plants were secured from the seed of the 20 best plants in 

 the previous selection series. About one and one-half bushels of seed were 

 threshed from the multiplying plot seeded in the fall of 1919 from the 20 best 

 plants mentioned above. It is planned to seed a larger multiplying plot during 

 the season of 1921, and to send some of this" selected seed to farmers in various 

 sections of the state for trial plots. 



Ensilage Corn Tests. — Of ensilage corn seventeen different varieties were 

 planted in 1919. The heaviest yield was secured from Eureka, 17.3 tons per 

 acre, with ears just forming. The lightest yield was from Stowell's Evergreen, 

 with only 7 tons per acre. The most promising of the newer varieties was 

 Early Lakeside, with a yield of 12.3 tons and ears in the dough stage. A table 

 is available showing the composition of the silage made from the various vari- 

 eties, as reported by the Chemistry Department. 



In 1920 one and one-half quarts of each of seven varieties were sent to 20 

 different farmers in the state through the county agents. The object of the 

 test was to determine the relative yield, maturity and adaptability of the sev- 



