136 EXPERIMENT STATION EECORD. 



other left exposed to frosts. In the protected bed 3.8 per cent of the 

 plants developed into seed-bearing- specimens, and in the exposed bed 

 7.5 per cent. Experiments with two-year-old and one-year-old seed 

 gave 14.8 per cent of seed-bearing beets with the two-year-old seed and 

 9.81 per cent with the one-year-old seed. Again, 100 large seed bolls 

 which weighed 1.23 gm. produced 6.3 per cent of seed-bearing plants 

 while 100 small seed bolls, having a total weight of 1.12 gm., produced 

 16.1 per cent of seed-bearing plants. Other experiments by Rimpau 

 showed that the deeply planted seed produced more seed-bearing 

 plants than seed planted normally in a similarly prepared seed bed. 

 A period of drought, excessive rain, or any weather condition which 

 checks the growth of the beets during any stage of growth, in the 

 opinion of the same experimenter, tends to further the development 

 of seed-bearing specimens. 



Relative to the means of reducing the number of precocious seed- 

 bearing plants to a minimum, it is suggested that seedsmen persistently 

 discard strains of sugar beets which tend to produce these abnormali- 

 ties, notwithstanding that the form, yield, and sugar content of the 

 beets may be all that is desired. Growers should guard against plant- 

 ing too early in the season and thus subjecting the 3'oung plants to the 

 effects of frost. Deep planting should be avoided and at the last 

 hoeing all beets growing seed should be pulled out by the roots. 



The comparative yield of corn from seed of the same variety 

 grown in different latitudes {ArJianxus Sta. Bui. 59, pj). 109-122). — 

 Samples of seed corn were obtained from 18 different States in 1898 

 and 20 in 1899 and planted in comparative plats at the station. For 

 the purposes of the expei-iment seed collected north of the thirty- 

 eighth parallel was designated as "'northern grown," that collected 

 between the thirty -eighth and thirty-fifth as "middle grown," and 

 that south of the thirty -fifth parallel as "southern grown." Ten 

 Northern, 7 Middle, and 3 Southern States were thus represented by 

 the different varieties of seed. In all, 11 varieties were compared, 

 many samples being procured of each variety. The yields obtained 

 in the different latitudes with Leaming, Golden Beauty, Hickory 

 King, Golden Dent, Champion White Pearl, Early Mastodon, and 

 White Dent are tabulated and averaged. With these varieties the 

 difference between yields of the same variety from different sources 

 in the same latitude was sometimes greater than the average difference 

 between varieties from different latitudes. The yields from seed of 

 Golden Dent grown in the north latitude varied from 15.9 to 18.8 bu. 

 per acre. Similar variations, though to a less extent, occurred with 

 other varieties. 



The average yields for two j^ears from seed obtained from the dif- 

 ferent latitudes are shown for the varieties most uniformly repre- 

 sented in the different sections In' the following table: 



