236 EXPERIMENT STATION RECORD. 



Steamed bone meal containing 4.5 per cent of nitrogen and 24 per 

 cent of phosphoric acid, and bone meal deprived of organic matter, 

 with 0.5 per cent of nitrogen and 35 per cent of phosphoric acid were 

 applied to barley, the former in 1895 and the latter in 1894 and 1895. 

 In each case 304 lbs. per acre of bone meal was applied to 1.35-acre plats. 

 A check plat was left for comparison. The bone meal with 0.5 per cent 

 of nitrogen had very little effect, only somewhat bettering the quality 

 of the grain, while the meal with the larger nitrogen content increased 

 the yield. The bone meal deprived of organic matter produced a 

 favorable effect on the oat crop the following season. Neither fer- 

 tilizer proved profitable. In 1894 and 1895, four ^-acre plats of fallow 

 ground growing a mixture of vetches and oats were manured with 

 various fertilizers. The first plat received 1G,000 lbs. of sheep manure 

 per acre; the second 000 lbs. of phosphorite and 240 lbs. of kainit per 

 acre; the third 8,000 lbs. of sheep manure, 300 lbs. phosphorite, and 

 120 lbs. kainit per acre, and the fourth 8,000 lbs. sheep manure and 

 300 lbs. phosphorite per acre. Phosphorite and kainit were least 

 effective. The application of manure, phosporite, and kainit was 

 most effective and proved most profitable. The results of the manure 

 and phosphorite differed only slightly from the results of manure alone. 



An experiment with manuring winter rye grown on "black fallow 

 ground" was carried out in 1894- ! 95. All plats were 1.35 acres in size 

 and had been in sheep pasture for 5 years previous. The first plat 

 received 10,666 lbs. of manure per acre; the second 400 lbs. phosphorite 

 per acre; and the third 5,333 lbs. manure and 200 lbs. phosphorite per 

 acre; the fourth served as a check plat. The manure produced the 

 greatest effect on the rye and the following oat crop, while phosphorite 

 was least effective. The quality of the grain was somewhat better 

 than that from the manured plat. The mixture of manure and phos- 

 phorite gave varying results, but in general it was more effective than 

 manure alone. The application of phosphorite, though having less 

 effect on the yield, was most profitable. — r. firemen. 



Kainit : Its importance and future in agriculture, Ij. Ciierny ae v 

 (SelsJc. Klioz. Lyesov., 183 {1896), p. 1236). — According to the author, the 

 favorable influence of kainit on crops is not due entirely to its potash 

 content, but chiefly to its hygroscopic properties, which are most evi- 

 dent in dry years, and which are due to the presence in it of chlorids 

 (especially magnesium chlorid). The last mentioned salt as well as the 

 other chief constituents of kainit, viz, sodium chlorid and the sodium 

 and magnesium sulphates, have been found by the author to be abun- 

 dant in the Russian salt lakes, and he suggests that they could be 

 profitably utilized in the manufacture of a substitute for kainit. — P. 

 FIREMAN. 



Green manuring {Jour. Bd.Agr. [London], 4 (1897), No. 1. pp. 1-10). — A resume of 

 experiments in this line of work l>y European investigators. 



On the industrial utilization of peat marshes in Sweden, Denmark, Northern 

 Germany, and Holland, A. 1>al ( Tidaskr. norske Lartdbr.. t(1897), pp. 76-91). 



Calculation of the production of farm manure ( Norsk Landmansblade, 15 

 pp. 607-609). 



