HKl.h CttOPS. 243 



The pots were divided into I Beries of LO pots each, one being the check Beriesand 

 the others receiving superphosphate and nitrate of Boda, or superphosphate and 

 chlorid of potash, or the 3 substances together. The check test with A.ufinov< 

 gave an average yield of 90.4 gra. of grain and 90.572 gm. of Btraw. The heaviest 

 yield of grain, L42.549 gm., was obtained with the complete fertilizer, the yield of 

 Btraw being L35.167 gm. Where phosphoric acid and potash were given the yield 

 was increased to 128 gm., with a considerable increase in the starch content. This 

 experiment indicates thai although the Boil was comparatively rich in available pot- 

 ash, the use of potash salts was beneficial. 



In the case of the other soilj which contained less available potash, the check tesl 

 yielded on an average 80 gm., the series of pots receiving superphosphate and chlorid 

 of potash L78 gm., and the series with the complete application l ss gm., or a differ- 

 ence of 10 gm. apparentlj due to the nitrate of soda. It is concluded thai leaching 

 the soil with solutions of citric and oxalic acid points out whet her or nol potash may 

 be profitably applied to the soil in barley culture. 



In the check tests on both soils the proportion of hulls ranged from LI. 37 to L2.86 

 per cent, and in the superphosphate and nitrate of soda series from L0.94 to 1 L.89 per 

 cent: but when chlorid of potash was given in addition to the superphosphate it 

 ranged from 8.64 to 10.04 per cent, and with the complete application, from 9.2 to 

 L0.53 per cent. The starch content varied from 66.82 to 70.22 per cent in the check 

 test, and where superphosphate was used, from 68.84 to 70.14 per cent; bul when 

 chlorid of potash was added it varied from 72.34 to 73.88 per cent. With the com- 

 plete application a starch content of 72.85 to 74. L0 per cent was recorded. The pro- 

 tein content of the barley was considerably increased by the use of nitrate of soda. 

 In the superphosphate and nitrate of soda series of pots it varied from 1l'.:;"> to 12.73 

 per cent, but the application of < hlorid of potash reduced it. 



[h the cooperative field experiments different combinations of superphosphates, 

 nitrate of soda, and kainit at the rate of 250, 200, and 300 kg. per hectare, respectively, 

 were applied. The results showed that 1 gm. of assimilable potash produced from 

 23 to 25 gm. of starch, and that the quality of brewing barley can be improved by 

 supplying potash and phosphoric acid in the fertilizer, especially when the soil is 

 rich in nitrogen compounds or when nitrate of soda is applied. 



Analysis of individual stalks of corn, E. F. Ladd (North Dakota Sta. Rpt. 1904, 

 ]>l. 1, p. 31). — Analysis of 2 successive generations of 2 corn plants are given. The '1 

 lots of corn from the same parent seed showed a protein content of 14 and 14.5 per 

 cent in L903and of L6.06 and 15.38 percent in L904. 



The work on flax. II. I.. Bollei (North Dakota Sta. Rpt 1904, pt. /, pp. 64, 65, 

 -This is a progress reporl on the work with flax, consisting of a comparative 

 study of varieties and a test of their resistance to the wilt disease. The development 

 and maintenance of immunity to the disease is described. 



Fertilizer experiments with hemp, Kuhnert (Mitt. Deut. Landw. Gesell., ?0 

 '1!"/.',), No. / /'. pp. 99, 100). — In 2 tests barnyard manure was applied alone and 

 together with different combinations Of Thomas Blag, kainit, and nitrate of soda in 



quantities of 30, 25, and 15 kg. per he. -tare, respectively. 



Given in addition to the manure, each substance by itself produced an increase in 

 yield, but the best and most profitable returns were secured with the complete 

 application. < m the barnyard manure plats the average yield amounted to 1,890 kg. 



and on the plats receiving the complete application of commercial fertilizers in addi- 

 tion to 2,240 l<L r . of hemp per hectare. No difference in the quality of the fiber from 

 the various plats was apparent. 

 The potato and its culture, \Y. T. Macoi n | Canada Cent. Expt. Form Bid. 49, 

 pis. -', ./'.'/•-■. ff).— This bulletin briefly notes the importance of potato culture 

 in Canada, reviews the history of the plant and its improvement, summarizes the 



