216 EXPERIMENT STATION RECORD. 



in the falls of 1891 and 1892, and 10 lbs. of nitrate of soda in the spring 

 of 1894. Tabulated data of the yields are given for 5 years. 



The plats receiving- the mixture of Tliouuis slag and kainit gave the 

 largest yields, followed by the potash i)lats. The residtuil effect was 

 greatest on those jdats receiving the mixture, followed by those on 

 which Thomas slag was used. 



Potatoes, L. K. Taft [Miclmian tita. Bui. ISi, pp- 3-11). — This is a 

 continuation of i)revious work reported in Bulletin 108 of the station 

 (E. S. E., 0. 1). 208). 



Test of varieties (pp. 3-9). — Xinety varieties were tested, 2 lbs. of seed 

 ot each variety being planted June 8. July 2 and twice later at inter- 

 vals of 3 weeks the plats were irrigated. The yields are tabulated, and 

 descriptive notes given on a number of varieties. The following vari- 

 eties are recommended: Early — Early Peachblow, Early Walton, Free- 

 man, Milwaukee, North Pole, Clay Rose, Victor Eose, and Pearl of Savoy ; 

 medium to late — Summit, American Wonder, Irish Daisy, Park Eegion, 

 O. K. Mammoth, On Toi>, Prize Taker, and others. 



Fertilizer test (pp. 10, 11). — On 17 eighth-acre plats on a light sandy 

 loam on which rye, buckwheat, and similar crops had been grown for 

 several years previous, were applied muriate and sulphate of potash, 

 ground bone, boneblack, nitrate of soda, wood ashes, and stable manure, 

 either alone or in various combinations. The Eural New Yorker Xo. 2 

 variety of i)otatoes was planted at distances of 3 by 3 ft. An un ma- 

 nured strip of 3 ft. was left between each plat and the adjacent one. A 

 diagram is given showing the arrangement of plats, kinds and amounts 

 of fertilizers applied, and the yields i)er acre obtained. The largest 

 yield was obtained where 24 loads of stable manure per a(a^e were 

 applied, a gain of nearly 70 bu. i)er acre over an adjacent unmanured 

 plat. The author states that the average gain from the use of a full 

 application of fertilizers was 80 bu. per acre. There was a gain of about 

 8 bu. per acre in favor of sulphate of potash over muriate of potash. 



Potato experiments, E. H. Miller and p]. H. Brinkley {Mary- 

 land Sta. Bui. SS,}}}). 55-63). — This is a continuation of work reported in 

 Bulletin 31 of the station (E. S. R., 6, x^- 983), and consists of tests of 

 varieties, experiments with fertilizers, green manuring, distance, meth- 

 ods of cultivation, amount of seed, and spraying. The yield where 

 crimson clover was j)lowed under showed an increase of 34.4 bu. per 

 acre, or 50 per cent. With distances 30 by 14'in. there was an average 

 gain for 2 years of 19 bu. per acre over 36 by 12 in. Practically the 

 same results were given by ridge and level culture and by deep and 

 shallow cultivation. The yields showed a gain of 86 per cent where 

 the plants were sprayed with Bordeaux mixture. 



Inquiry into the principles of potato growing, and tests of varie- 

 ties, V, Schweitzer {^[issouri ISta. Bnl. 33, pp. 24). — Inconclusive 

 exi)eriments were made in 1891. In 1894, on well-prepared land, plowed 

 and subsoiled 18 in. deep, and to which 1,300 lbs. jier acre of a fertilizer 



