FIELD CROPS. 41 



3 years to apply 100 lbs. of kainit in a complete fertilizer than to use 200 lbs. 

 of kainit. The average of the conclusive experiments shows that in 1913 in 

 north Alabama 100 lbs. of nitrate of soda applied after the plants were 6 in. 

 high was more effective and profitable than was 200 lbs. of cotton-seed meal ap- 

 plied before planting." 



Method of improving cotton by seed selection, R. Y. Winters (North 

 Carolina Sta. Circ. 3 {1913), pp. 4, fig. i).-— Methods of selection through the 

 third year in the plant-to-row system of crop improvement with cotton are given. 



Buying' cotton seed for planting, K. Y. Winters (North Carolina Sta. Circ. 

 14 (1014), pp. 2). — Cautions to buyers and suggestions for the home growing 

 of cotton seed are given. 



Long staple cotton in North. Carolina, C. B. Williams (North Carolina Sta. 

 Circ. 13 (1914), PP- ^)- — Stiitistioiil notes are giA'en with suggestions for grow- 

 ing and ginning upland long-staple varieties. 



Growing Egyptian cotton in the Salt River Valley, Arizona, E. W. Hudson 

 (U. 8. Dept. Agr., Farmers' Bui. 511 (1914), PP- 8)-— In order to foster the 

 cultivation of Egyptian cotton for the production of large yields of uniformly 

 long and strong fiber this publication describes methods of preparing the land 

 and irrigating and cultivating the ci'op which have proved successful in the Salt 

 River Valley. The subjects taken up include selection, slope, and early prepara- 

 tion of land, preparation of the seed bed, planting, early cultivation, early irri- 

 gation, thinning, late cultivation, late irrigation, picking, ginning, and baling. 



Cotton in the Dominican Repiiblic (Bui. Pan Amer. Union, 31 (1913), No. 5, 

 I'p. 611-680, figs. 2). — This describes the methods of cultivation employed in a 

 successful attempt to cultivate cotton under irrigation in the Yaque Valley, 

 near Monte Cristi. The product of 350 acres is noted as being " extremely long, 

 fine, and strong, averaging very even, and is graded as 15-in. staple." 



A comparative study of the composition of hops grown in different parts 

 of the world, II. V. Taktab and B. Pilkington (Jour. Indus, and Engin. Client.. 

 5 (1913), No. 6, pp. //7S-//80).— Previously note<l from another source (E. S. R., 

 29, p. 534). 



Species and varieties of malangas cultivated in Cuba, J. T. Roio Y Mesa 

 ET AL. (Estac. Expt. Ag-ron. Cuba Bol. 21 (1913), pp. 26, pis. 11).— This de- 

 scribes 11 varieties of Xanthosoma and Colocasia, with their chemical analyses 

 and methods of cultivation. 



The influences of subsoiling on yield, Augstin (Illus. Landiv. Ztg., 33 

 (1913), No. 32, pp. 303, 304, flffs. 2).— Oats showed an increased yield of both 

 straw and grain when the land was subsoiled to a depth of from 24 to 27.5 cm. 

 (9.4 to 11.7 in.). 



Notes on the culture of peanuts, E. Leplae (Bui. Agr. Coivgo Beige, 4 

 (1913), No. 3, pp. 610-621, figs. 4)- — This gives notes on the peanut industry in 

 the Belgian Kongo district and describes methods of cultivation in practice 

 there. 



Fertilizer experiments with potatoes, Clausen (Illus. Landw. Ztg., 33 

 (1913), No. 18, pp. 164-166, fig. i).— Results here noted give relative yields a,< 

 follows: With complete fertilizer 100, without nitrogen 44, without phosphorus 

 76, without potash 67, with complete fertilizer plus lime 80, and without fer- 

 tilizer 39. 



In another experiment the peculiar influence of a deficiency of potash in the 

 presence of lime-nitrogen and Thomas slag is noted. The relative yields were 

 complete fertilizer 100, without nitrogen 76.4, without phosphorus 69.4, without 

 potash 36, and unfertilized 41.5. The small yield without the potash is ex- 

 plained as a result of a physical action of the lime nitrogen and Thomas slag 

 on the soil, which was of a light sandy nature. 



