FIELD CROPS. 1069 



the characters of each variety together with a ijrief history and s^tatement of the 

 source of the seed used are noted. 



With the notable exception of Reid Yellow Dent, the introduced varieties did not 

 give as good results as those grown from seed produced within the State. The late 

 maturing varieties gave better yields than the earlier ones and the yellow varieties 

 were in general better yielders than the white varieties. Neither the proportion of 

 corn to cob nor the size of the ear seemed to bear any relation to the yield. Of the 

 introduced varieties Reid Yellow Dent, Boone County White, Learning, and Silver 

 Mine are considered promising varieties and capable of being adapted to Nebraska 

 conditions. 



Increasing' the yield of corn, A. M. Soule and P. 0. Vanatter ( Tennessee Sta. 

 Bui. Vul. XVII, No. 2, pp. 25-4S, figs. 11). — The exiieriments in inii)roving the yield 

 of corn here described represent cooperative work between the station and the 

 Bureau of Plant Industry of this Department. The importance of increasing the 

 yield within the State is discussed, and directions for the improvement of varieties 

 are given in addition to experimental results. 



Of 62 varieties grown at the station only 36 of those under test for 4, 3, and 2 years 

 are considered. The best average yields for 4 years were made by Hickory King, 

 Champion White Pearl, Improved Leaming, White Rockdale, and Early Learning, 

 producing 46.87, 43.11, 42.13, 41.66, and 41.51 1)u. per acre, respectively. The small- 

 est percentage of cob, 13.09 per cent, was sho^\'n ])y Hickory King, and the largest, 

 27.07 per cent, by Large White Flint with Yellow Creole and Improved Leaming, 

 with 27.78 per cent and 19.76 per cent, respectively, ranking next. Among the vari- 

 eties grown for three years Wisconsin Early White Dent, Reid Yellow Dent, and 

 Virginia Horsetooth, yielding on an average 43.52, 43.11, and 42.30 bu. per acre, 

 respectively, were leaders. 



The authors recommended the following varieties for different Tennessee soils: 

 For light uplands. Hickory King, Early Leaming, Iowa Gold Mine, 100 Day Bristol, 

 and Golden Beauty; for soils of mediimi fertility, Cocke Prolific, Virginia Ensilage, 

 and Virginia Horsetooth; and for rich river bottoms, Huffman, Cocke Prolific, and 

 Shaw Improved. In observing the influence of weather and soil it was found that 

 Huffman on medium upland yielded 29.23 bu. per acre in 1900, 8.93 bu. in 1901, 

 59.48 bu. in 1902, 24.55 bu. in 1903, and an average of 30.55 bu. for the 4 years. 



Culture tests were made with Hickory King and Cocke Prolific. Hills of 2 stalks 

 each were planted at distances of 30, 36, 42, 48, 54, and 60 inches. The average 

 results for 3 years with Hickory King were as follows: 30 in., 48.93 bu.; 36 in., 45.15 

 bu.; 42 in., 42.49 bu.; 48 in., 42.52 bu.; 54 in., 37.44 bu., and 60 in., 32.56 bu. The 

 results with the other variety were similar. At 30 inches the yield was largest, but 

 the ears were small and deformed, while at 48 in. the form of the ear and the quality 

 of the grain was good. The following statement is based upon the results obtained: 

 "One hundred acres of Hickory King planted at 48 in. would have yielded 500 bu. 

 more grain than if planted at 54 in., and 1,000 bu. more grain than if planted at 60 in." 



In selection experiments it was noticed that there was a variation of 7 to 19 days 

 in the dates of ripening and from 9.8 to 14 tons in the yield of green crop and from 

 54.65 to 68 bu. in the yield of ears per acre with Cocke Prolific corn planted in single 

 rows. 



In fertilizer experiments, Cocke Prolific on a plat receiving 8 tons of barnyard 

 manure per acre produced 22.10 bu. more than on the check plats. Where 25 bu. 

 of lime per acre was applied the increase was 20.09 bu., and where a complete ferti- 

 lizer consisting of 100 11 )s. of nitrate of soda, 150 lbs. of acid phosphate, and 50 lbs. 

 of muriate of potash was used the increase was 18.31 bu. For Hickory King the 

 fertilizer applications proved of but little value, the gains over the check plats being 

 as follows: From lime, 7.28 bu. ; from barnyard manure, an average of 6.77 bu. ; and 

 from the complete application only a little over 3 bu. 



