12 STATE HORTICULTURAL SOCIETY. 



rented on a five-year lease on the Buskirk farm at Paw Paw. In addition 

 to this, we have imposed upon tlie kinchicss of many of the fruit growers 

 throughout the state for the use of their orchards and vineyards for 

 experimental woik. We wish to express our appreciation at this time 

 for their generosity and their spirit of cooperation that has Ijeen exempli- 

 fied in all GUI' projects upon commercial farms. The following is an 

 outline of the experiment projects in horticulture in 1920 and 1921: 



Project PRUNING EXPERIMENTS. 



Xo. 1 J. p. Munson farm, Grand Rapids, 1921. To determine the 



most economical kinds and degrees of pruning in a five-year 

 old Jonathan apple orchard. 



X(». 2 Graham Experiment Station. 1919. To ascei-tain the effect 

 of different degrees and kinds of pruning of apple trees from 

 the time of setting thiough a period of years on growth and 

 production. 



Xo. 3 Graham Experiment Station, 1920. A demonstration of re- 



sults in the permanent form of trees when pruned on the stand- 

 ard open-head sj^stem; the modified leader sj'stem, and un- 

 pi'uned leader system. 



ORCHARD CULTURAL EXPERIMENTS. 



No. 4 Graham Experiment Station, April 1921. To ascertain the 

 practicability of growing !Montmoi'ency cherries in alfalfa sod 

 supplemented by mulching and fertilizing. 



No. 5 Graham Experiment Station, April, 1920. A test of the 

 several kinds of cover crops and their relative effect on tree 

 growth and fruit production. 



Xo. 6 Graham Experiment Station, April 1920. To compare the 

 effect of different systems of culture on young apple trees 

 including alfalfa, clover and clean cultural plots. 



ORCHARD FERTILIZATION EXPERIMENTS. 



No. 7 Quinlan Orchard, Grand Rapids, April 1920. To study the 

 effects of different amounts of nitrogenous fertilizers applied at 

 different times, on gi'owth and fruit produrtioii, ;ind a study 

 of the physiological changes resulting. 



No. 8 Farrand Orchard, Eaton Rapids, April 1920. Demonstra- 

 tional experiment on the value of the several kinds of fertilizers 

 in a soil depleted orchard. 



No. 9 Graham Experiment Station, 1920. To determine tiic rela-' 

 five nitrogenous requirements of trees growing in grass sod, 

 alfalfa sod, and under clean culture with cover crops. 



No. 10 Graham l*]xperiment Station, 1921. To ascertain the effects 

 of niti'ogenous fertilizers on peaches applied at different times 

 of the growing season. 



POLLINATION EXPERIMENTS. 



Xo. 11 College Orchard, April 1921. To determine to what extent 



Northern Spy, Oldenburg and Hj'slop are self-sterile; and if 

 self-sterile, to determine which of the standard varieties of 

 Michigan may best be used as pollinizers. 



