86G 



EXPERIMENT STATION RECORD. 



tislicH (in till' proiliiction j^ivt'ii, and the reyult.>< of expcriiiicnts reported. A fertilizer 

 test was made on a sandy, noncalcareous clay soil. The first or check plat received 

 no fertilizer, the second received barnyard mannre <jnly; tlie third 400 kg. of super- 

 j)hosphate jK-r hectiire in addition to the mannre, ami the fourth 160 kg. of nitrate 

 of soda per hei-tarein addition to the manure and the superpliosphate. The increase 

 per hecUxre in financial results on the second plat over the first was 120 francs, and 

 on the tliird and fourth plats 105 and 210 francs, respectively, over the second. The 

 average results of a cooperative experiment c^arried on l)y 24 farmers on this same 

 plan gave an increase of 8,548 kg. of potatoes per hectare in favor of the application 

 of I'ommercial fertilizer. 



Potato trials of 1903, E. S. Brown {Amer. Gard., 25 (1904), Ko. 47S, pP- 

 133,134). — Of nearly 100 varieties tested the following are considered the most 

 promising: Extra early varieties — Eureka, Early Snowball, Early Whiton, and 

 Krine Lightning; early to medium varieties — Early Ohio, "White Ohio, New Queen, 

 Irish Cobbler, Red Triumph, Early Puritan, Early Michigan, Pearly Thorburn, and 

 Peck Early; medium to late varieties — Potentate, Vornheim, King of Michigan, 

 Chicago Market, and Great Divide; late and general purpose varietie.s — Green 

 Mountain, Bonanza, Whiton Mammoth, and Yellow Elephant. Descriptive notes 

 on these and on other leading varieties are given. 



A method of storing' potatoes, E. Schribaux {Jour. Agr. Prat., n. ser., 7 {1904), 

 No. 7, jijK 214,215). — The experiments here described are essentially trials of stor- 

 ing and growing potatoes in pulverized soil or sand kept in the dark. Early in 

 June potatoes were planted in wooden boxes filled with moist potting earth and 

 placed in a dark basement where the temperature varied but little from 15° C. The 

 tubers were planted 6, 12, and 18 cm. deep in the same boxes. Practically no care 

 was given them until the boxes were examined in December, when it was found 

 that a crop of new potatoes amounting in weight to one-half that of the tubers 

 planted had been produced near the surface of the soil. 



The tubers of the new crop were all at the same level, although the planting had 

 been at different depths. It was noticed that at a depth of 20 cm. some tubers pro- 

 duced only a few tender sprouts, and that by placing them somewhat deeper they can 

 be kept without change, excepting a reduction of the starch content, until August. 

 If placed too deep the tuber is deprived of oxygen, intramolecular respiration is sub- 

 stituted for normal respiration, and decomposition results. 



Thickness of seeding in its relation to the yield and the development of 

 the head of spring' rye, E. Gross {FiiJdiny's Landw. Ztg., 53 {1904), ^o. 2, pp. 

 57-60). — Three series of plats were seeded with rye in the spring. Different quan- 

 tities of seed were used, and the results obtained are shown in the following table: 



Results with spring rye sown at different redes. 



"Weather in its relation to the yield and quality of sugar beets, Grohmann 

 {Deut. Landw. Presse, 31 {1904), No. 11, pp. 83, ^.^).— Weather conditions in relation 

 to sugar-beet culture are discussed and meteorological data, together with the average 

 yield and quality of sugar beets for the years 1892 to 1900 inclusive, are given. 



