522 EXPERIMENT STATION EECORD. 



of fertilizers was profitable on light soils even in dry seasons, but that irriga- 

 tion increased their action in such seasons. 



The loss of nitrogen from thin layers of manure on the soil, J. Jannes 

 {Ber. Physiol. Lab. u. Vers. Anst. Landw. Inst. Halle, 1911, No. 20, pp. .5-69, 

 figs. 3). — An aceoimt of investigations already noted from another source (E. 

 S. R., 25. p. 826). 



The action of increasing amounts of mineral fertilizers with and without 

 addition of stable manure, A. Eineoke (Loiulic. Jahrh., ffl {1911), No. .?-.), 

 pp. 373-387). — This article refers to previous exiieriments by M. Maercker from 

 which the conclusion was drawn that the highest yields of beets can not be ob- 

 tained with commercial fertilizers alone, and reports experiments made near 

 Berlin on 0.02 acre plats to determine the effect of mineral fertilizers — nitrate 

 of soda, kainit, and Thomas slag — in three different amounts, alone and com- 

 bined with stable manure, for fodder beets grown in 1906 followed without 

 further application of fertilizer or manure by oats in 1907 and wheat in 1908. 



The highest yields of beets were obtained with mineral fertilizers combined 

 with manure, especially with the smaller amount of fertilizers. When the 

 largest (triple) amounts of the mineral fertilizers were used, namely, 660 lbs. 

 of nitrate of soda, 1,980 lbs. of kainit, and 1,320 lbs. of Thomas slag per acre 

 the yields were but slightly less than when the same amounts of mineral fer- 

 tilizers were combined with stable manure, 22 tons per acre. Stable manure 

 alone produced about the same yield as the smallest application of mineral 

 fertilizers (1/3 of the amounts given above). There was a decided after effect 

 of the fertilizers, and especially of the manure, upon the oat crop in 1907 but 

 no effect upon the wheat crop of 1908. The mineral fertilizers were more active 

 alone than in combination with the manure, since the increased yield with added 

 manure was not proportional to the amount of fertilizing matter which the 

 manure sui>i)lied. 



Apparently the manure unfavorably affected the utilization of the mineral 

 fertilizers the first year. The results, however, did not bear out B. Schulze's 

 conclusion (E. S. R., 22, p. 716; 26, p. 424) that after the first year there is an 

 increasing action of the mineral fertilizers accompanying a decreased effect of 

 the manure. 



Conducting an experiment farm during twelve years with green manures 

 and artificial fertilizers, von Bleze {Trudy Opytn. Stantsn Kurliandsk Obshch. 

 Selsk. Khoz., 1 (190^-1909), pp. 3-32; abs. in Zhur. Opytn. Agron. {Russ. Jour. 

 Expt. Landw.), 12 (1911), No. 1, pp. 9Jf-96). — The severe climatic conditions of 

 the Baltic provinces do not permit the maturing of lupines which are so largely 

 used in Germany as the foundation of farming without manure, and this has 

 resulted in the almost complete absence of crop raising without manure in this 

 region. In 1893 the Curland Agricultural Society, on the initiative of the author, 

 undertook experiments to determine whether farming without manure could 

 be profitably carried on with the aid of vetches and clover as green manures, 

 rotating with rye, oats, potatoes, and barley. In the course of this rotation 

 each field received during the first and fourth years Thomas slag and kainit, 

 the second year bone meal, and the third and sixth years lime and nitrate. 



The general conclusion reached was that profitable farming could be carried 

 on under the climatic conditions with green manures and artificial fertilizers 

 alone even on very poor soils. 



Fertilizers, 1911, E. H. Jenkins and .J. P. Street {Connecticut State Sta. 

 Rpt. 1911, pt. 1, pp. 100) .—Thi's, report deals briefiy with the requirements and 

 observance of the state fertilizer law, the distribution and classification of the 

 fertilizers collected, and analyses ^nd valuations of 780 samples of fertilizers and 



