38 EXPEKIMENT STATION EECOKD. 



the 20 Laving the highest by G.42 iu shelling percentage and S.57 bu. per acre 

 in yield. 



Seed corn taken from a highly manured plat and known as the rich strain 

 outyielded in 1007 a phit unfertilized for IG years and known as the poverty 

 strain l)y 0.98 bu. per acre, and in 1908, by 2.32 bu., but in 1909 the poverty 

 strain led by 3.8 bu. Ears selected from stalks grown in normal stand pro- 

 duced, iu a 4 years' test, an average of 2.36 bu. more per acre than ears selected 

 without knowledge of the stand. Seed selected from plats planted at the rate 

 of 1, 3, and 5 plants per hill produced yields of 91.49, 91.74, and 92.58 bu. per 

 acre, respectively. 



From 600 ears germinated under 1 iu. of soil, those first up produced au 

 average yield 2.84 bu. less than those which came up last. The kernels con- 

 taining tlie hirger proportion of white starch absorbed water more rapidly 

 and germinated more quickly. The 40 per cent of ears showing the best germi- 

 nation produced an average yield 0.08 bu. per acre greater thau the 40 per cent 

 showing the poorest germination. 



In hills 42 iu. apart each way, the plats planted at the rate of 4 plants per 

 hill produced a greater yield than those planted at the rates of 1, 2, 3, or 5 

 plants per hill. 



Crossing experiments with corn, P. Holdefleiss (Ber. Physiol. Lab. u. 

 Vers. Aiist. LiiiKlw. Jitst. IJallc, 1909, No. 19, typ. nS-199).— The author used 

 numerous different types of corn in his exi)eriments anil presents observations 

 on xenia and mutations. It was observed that short shanked ears were less 

 inclined to the simultaneous production of male and female flow^ers than were 

 the long shanked ears, while this mingling of male and female flowers occurred 

 most frequently on the suckers. 



Corn: Variety tests, seed breeding, selection and testing, C. W. Ss^ash 

 {ManjjHHd HUi. Bui. l',l, mi. lOJ-13'/. JUjx. iO).— During the period 1903-1907 

 the highest yielding varieties were Cocke Prolific, Selection No. 77, and Boone 

 County White (Indiana) with yields of 63.6, 58.9, and 57.62 bu. per acre, re- 

 siiectively. During the periods 1904-1907 and 1905-1907. and during the single 

 years 1907 and 1908, the St. Omer variety stood first with yields ranging from 

 63.53 to 86.16 bu. per acre. The results of variety tests at 6 different farms are 

 reported in tabular form, as are also data regarding 28 varieties tested at the 

 station in 1907-8. Chemical analyses show the protein, fat, and ash content of 

 the seed used and of the crop produced in the case of 19 of these varieties. 

 The score cards adopted by the Ohio Corn Improvement Association for use 

 in the plant selection of corn, in the judging of corn at husking time, and in 

 the final selection of seed ears are presented with explanatory notes. Full 

 directions are given for conducting germination tests. 



[Variety and distance tests of corn and cotton], J. L. Burgess {Btil. N. C. 

 Dept. Affi:, 31 {1910), No. 2, pp. 19).— A test of 37 varieties at the Edgecombe 

 farm indicates that northern and western varieties do not yield as well on 

 this farm as varieties previously grown in a lower latitude. Biggs Seven Ear, 

 Patton and Marlboro Prolific produced the highest yields. 



At the Iredell farm, 37 varieties of corn were tested on Cecil loam. The 

 best yields were produced by Parker Cocke Prolific, Wilson Success, and Boone 

 County Special. The Prolific corns made the largest yields at this and the 

 Edgecombe farm. Among 21 varieties of cotton. King Improved and Missionary 

 produced yields worth $4.50 per acre more than those produced by any other 

 variety. The highest yield of corn was produced in rows 5 ft. apart with plants 

 1* ft. apart in the row, while plants 20 to 24 iu. apart in rows 3i ft. apart 

 produced the highest yields of cotton. 



