38 EXPERIMENT STATION KECORD. 



tiliziHl the seed berries iire (Iropped in less than S days after fertilization, tiud 

 it is eoneiuded tliat tlie persistency of tlie berries increased directly with au 

 increased percentage of fertilized (tvnles. \ sunnnary of the procedure in 

 hybridizinj; potatoes is jiiven. 



In a stndy of the correlations between characters, round and oblong shai)es, 

 deei» and shallow eyes, roufih and smooth skins, tall and dwarf plants, and col- 

 ored and uncolored stems were compared in fiood pollen and poor i)ollen varie- 

 ties. Out of the correlation tables constructed only four showed correla- 

 tions lii.L'licr than the probable error, and these were all correlations where color 

 is nianifi'sted on different parts of the plant. 



The sugjiestions rejrarding extension work in ajj;ronomy contain outlines of 

 4 fertilizer experiments. 4 experiments with lejiununous crops. 3 in seed selec- 

 tion, and '2 with varieties. 



Corn breeding in Minnesota, C. P. Bull {Mhuirsotd .S7ft. Bui. 107, pp. 177- 

 2-j(i. /i!i'<. 'i')). — The possibilities of corn improvement in Minnesota are discussed, 

 the need of such work is pointed out, and detailed directions on the methods of 

 corn improvement followed at the station are given. Some of the more impor- 

 tant sub.iects discussed are lack in uniformity of type, pollination and formation 

 of ears, factors iufiuencing yield and quality, principles of breeding, the breeding 

 plat, the registry system, the pedigree chart, and the score card. 



Plant breeding for farmers. II. J. Webber (Xcid York Cornell Sta. Bui. 2-31, 

 pp. 2'.)I-S.i.i. p'(/x. JO). — This bulletin discusses simple methods of plant l)reeding 

 suitable for the general use of farmers. Some of the factors of plant breeding 

 such as pedigree breeding, variations, principles of selection, transmitting power, 

 control of parentage, and record keeping are described, and methods in detail 

 for breeding corn, wheat, oats, barley, and potatoes are presented. 



Cereal production of Europe, F. R. Rutteb ( U. 8. Drpt. Af/r., Bur. Statis. 

 Bui. 68, pp. 100). — This bulletin contains the results of an investigation of the 

 conditions attending the production, supply, and consumption of grain in Europe. 

 The statistics of acreage and ])roduetion and of imports and exports are given 

 for each country covering a period of 20 years, and the statistics relating to the 

 main progress or decline of grain culture in each country are also presented. 

 The inadequacy of the surplus of eastern Europe to supply western Europe, the 

 extent as well as the limits of grain culture in Europe, and the relation of the 

 grain area to ai-able land are discussed, and statistics are given to point out 

 existing condition.s. Notes and statistics are also given on the average yield of 

 grain, the average size of holdings, and the acre value of crops.' 



European grain trade, F. R. Rutter (U. S. Dept. Afir., Bur. 8tatis, Bui. 69, 

 pp. 6-3). — This liulletin presents the results of a thorough investigation of the 

 conditions attending the imi)ortation and exportation of grain in Europe during 

 a period of years. The imports and exports of cereals for each country, in 

 nearly all cases covering the period from 1883 to 1905 or 1906. are shown in 

 tables. Brief explanations of the data are given and special features of the 

 cereal trade of each country are pointed out. There are also general notes on 

 the grain deficit in western Europe and on the countries of surplus production. 



HORTICULTURE. 



Report of the horticulturist. M. .7. Iorns (Porto Rico 8ta. Rpf. 1907. pp. 

 20-30. liij. I). — The work for the past year was largely in continuation of work 

 ])reviously reported (E. S. R.. 18. p. 1044) and consisted of cultural and variety 

 tests of economic fruits and vegetables. Several new lines were outlined both 

 for the station and for cooperating planters, some of the more important of 

 which are cover crops, treatment of pineapple plantings after the second year. 



