FIELD CROPS. 635 



any other strain, either of native or foreign origin. The yield of 2 years' crop- 

 ping of Swedish late was 58,730 kg.; of Swedish medium 50,570 kg.; and of 

 Swedish early 49,500 kg. per hectare of green material. 



The corn crops, E. G. Montgomery (Neiv York, 1913, pp. XV II +847, figs. 

 121).— This Is a volume of the Rural Text-book Series, edited by L. H. Bailey, 

 and treats of the production of corn and sorghum crops. 



The author divides the subject of the study and philosophy of crop produc- 

 tion into 4 phases, the first 2 of which, viz, (a) the plant, its structure, physi- 

 ology, and normal requirements, and (b) a general survey of the region where 

 it is proposed to cultivate the plant, in order to note how the natural conditions 

 found correspond to the needs of the plant, are of a technical nature. The 

 other 2 phases, (c) the adaptation of the plant to natural conditions on the 

 one hand, and the adaptation of soil to the needs of the plant on the other, and 

 (d) the necessity of protection against other indigenous plants, fungus diseases, 

 and insects, are more practical and written in a more popular style. 



Report of the work in corn pollination, III, M. L. Fisiieb {Proc. Ind. Acad. 

 Set., 1911, pp. 2S3, 284). — This reports work in continuation of that begun in 

 1908 and previously noted (E. S. R., 28, p. 831). 



Some results of hand pollination were as follows: "The effect of using Reid 

 Yellow Dent as a male on Boone County White was to increase the height of 

 the stalk noticeably, while the reciprocal crops showed a sturdier stalk than 

 is usual with either variety. Sweet corn as either parent induced an abun- 

 dance of suckers. The average for G different rows in which the seed used had 

 some sweet in it was 47.5 per cent of the stalks being suckers, some stalks 

 having as many as 6 to 8. Also, where Reid Yellow Dent was the male, the per- 

 centage of suckers was large, amounting to 42.6 per cent of all the stalks, while 

 the reciprocal gave only 9.6 per cent. It is well known that sweet corn normally 

 produces many suckers, and under favorable conditions Reid Yellow Dent pro- 

 duces more than most dent varieties. The Sweet-Reid Yellow Dent and the 

 Reid Yellow Dent-Boone County White crosses which had the largest percent- 

 age of suckered stalks also showed the largest percentage of twin ears and 

 the smallest percentage of barren stalks. It may not be accepted that suckers 

 are an indication of prolificacy, but this series of experiments indicated as much. 



" This being the third year of the experiment, the constancy of dominants and 

 recessives would be expected to show itself. Sweet, red, speckled, and white 

 are supposed to be recessive to dent and yellow. In IS self-pollinated ears from 

 sweet, 15 were pure sweet and 3 mixed white, sweet, and yellow. In 12 ears 

 from speckled seed, 9 were pure speckled, 2 pure yellow, and 1 pure red. In 

 15 ears from red seed, 13 were pure red and 2 pure yellow. However, In none 

 of the pollinations from white seed was the percentage of pure ears so high, 

 the highest being from the white seed selected from the Sweet-Reid Yellow Dent 

 cross, in which 7 out of 12 ears were pure. In the experiments of 1908 yellow 

 showed itself dominant to all other colors, consequently It would contain not 

 only the dominants but the hj^brids and such a condition manifested itself in 

 the various selection from yellow seed. A notable exception was from a row 

 planted with yellow seed from a twin ear. Every self-pollinated ear from this 

 row was pure yellow. From the Sweet-Reid Yellow Dent cross 2 types arose, 

 one with whitish kernels and white cobs, like the original Stowell Evergreen, 

 and the other with yellowish kernels and red cobs. These 2 types were planted 

 in 1911 on the grounds of the horticultural department, Purdue University. 

 The season being backward the crop was not large, but enough was obtained to 

 show that the types were fixed and would breed true." 



Cotton and com variety tests, R. J. H. DeLoach {Qeorgia Sta. Giro. 10 

 {1914), pp. 3). — Results of 20 varieties of cotton in 1913 showed Wannamaker 



