890 EXPERIMENT STATION RECORD. 



fbim of siiperpliosphate it was in most cases more valuable than in slag 

 and bone meal. However, on peaty or mossy soils slag was equally 

 elective. Bone meal gave a smaller increase in the yield of turnips 

 than basic slag and idtrate of soda applied together in such quantities 

 as to furnish equivalent amounts of phosphoric acid and nitrogen. 

 Sulpbate of potash proved a profitable addition to phosphatic and 

 nitrogenous fertilizers. Barnyard manure alone afforded large crops, 

 but better results were obtained by using half rations (10 tons per acre) 

 of barnyard manure with small quantities of phosphatic and nitrogenous 

 fertilizers. 



The soil of the unfertilized plat on one of the farms contained 0.126 

 per cent of phosphoric acid and 0.116 per cent of potash. The amounts 

 soluble in a 1 per cent solution of citric acid were 0.0054 per cent of 

 phosphoric acid and 0.00G2 per cent of potash. This soil responded 

 freely to phosphatic and potash fertilizers, as also to nitrogen. As 

 compared with the unfertilized plat there was an increased yield of 13 

 tons per acre when a high grade superphosphate was applied, 14 tons 

 when superphosphate and nitrate of soda were used, and 19 tons when 

 superphosphate, nitrate of soda, and sulphate of potash were applied. 



Jerusalem artichokes, turnips, and mangel- wurzels, R. L. Ben- 

 nett and G. B. Ieby {ArMnsas Sta. Bui. 31, pp. 24-28). — These crops 

 were grown as food for hogs. At Newj)ort Jerusalem artichokes were 

 planted 36 by 18 in. apart and the yield was 453f bu. per acre ; at Fayette- 

 ville the distance was 3 by 3 ft. and the yield 612 bu. per acre. Nine- 

 teen varieties of turnips were grown. The test of mangel- wurzels was 

 unsatisfactory. Food analyses of artichokes, sweet potatoes, mangel- 

 wurzels, and turnips are given. 



Experiments at Borsbeke-lez-Alost (Belgium), P. de Vuyst 

 [Rev. Agron. Lotivain, 3 (1894), No. 4, pp. 251-286). — These consisted of 

 fertilizer experiments and variety tests on potatoes, oats, carrots, pars- 

 nips, and turnips, and culture experiments with potatoes, maize, and 

 roots. 



In experiments with beets, wheat, and potatoes the plats submitted 

 to an electric current produced by a zinc and copper couple afforded 

 smaller yields than the check plats. With potatoes the application of 

 nitrate of soda at planting time and during cultivation gave practically 

 the same results. The continued selection of seed potatoes during 3 

 years by planting those which had the highest percentage of starch, 

 as shown by their sinking in brine, increased the yield 6.5 per cent and 

 raised the percentage of starch in the crop. 



On beets the nitrogen of nitrate of soda was more effective than that 

 of sulphate of ammonia. Nitric nitrogen applied at planting afforded a 

 larger yield than an intercultural application. Kainit was of less value 

 on carrots than oh parsnips. 



Fertilizer experiments with cereals and potatoes at the S"wed- 

 Ish Agricultural College, 1892-'93, 8. Ehodin {Kgl. Landt. AJcad. 



