130 EXPERIMENT STATION KEC'OKD. 



The influence of calcium carbonate on the action of different calcium phos- 

 phates, D. N. PuiANisiiNiKov (7^1'. Moskow Sclsk. Khoz, Inst. [Ann, /u.sV. Ar/ron. 

 Moscoii], 15 (1909), No. 1, pp. 1-15, figs. 10). — Pot experiments with different 

 crops, using varying amounts of calcium carI)onate in combination wltli tlie 

 different phosphates, showed that the action of Thomas slag, monopotassium 

 phosphate, and nionocalcium phosphate was almost unaffected by the addition 

 of calcium carbonate. With raw phosphate, bone meal, and triealcium phosphate 

 the depressing action of the calcium carbonate was very marked. Chemical 

 analysis as well as the yields showed that the assimilation of phosphoric acid 

 was very greatly influenced in many cases. The results described were obtained 

 with Gramineaj and buckwheat, but when plants such as lupines and flax, which 

 are antagonistic to lime, are used, the action of the calcium carbonate was 

 always more or less depressive. 



Lime experiments, D. N. Prianishnikov (Isv. Moskov. Selsk. Khoz. Inst. 

 [Ann. Inst. Agron. Moscou'], 15 {1909), No. 1, pp. 109-115, figs. 2). — In experi- 

 ments to determine the influence of increasing amounts of calcium carbonate 

 on different soils and plants it was observed that liming was frequently injurious 

 to Graminese when the amount of calcium carbonate added was more than 0.25 

 per cent of the weight of the soil. When less than this amount was used the 

 results were very favorable. It was observed also that lupines, which are gen- 

 erally considered antagonistic to lime, responded favorably to liming in small 

 amounts on certain kinds of soils. The limits of favorable action of the lime 

 for lupines on such soils were, however, lower than for Graminese. 



The definition of marl, C. A. Stewart {Econ. Geoh, k (1909), No. 5, pp. .'t85- 

 489). — The various uses which have been made of the term marl are given and 

 the author concludes that in his opinion the term " should be employed in its 

 original sense — as any rock that is valuable as a natural fertilizer (with the 

 exception of the phosphate rocks and such well-defined minerals as gypsum 

 which seem to be separated in general usage)." 



The agricultural utilization of the town garbage in Breslau (Gesundheit, 

 1909, p. 152; abs. in Wasser ti. Abwasser, 1 (1909), No. 13, p. 551). — The main 

 features of the city regulations regarding the handling of garbage are given. 



Fertilizers, C. S. Cathcart (New Jersey Stas. Rpt. 1908, pp. 7-13). — This is a 

 summary account of inspection of fertilizers in New Jersey in 1908, the details 

 of which have been given in bulletins of the station (E. S. R., 20, pp. 625, 926). 



A table is given which shows the wholesale price in New York in 1907 of 

 nitrogen, phosphoric acid, and potash in various fertilizing materials. 



During 1908, 735 samples of fertilizing materials were examined. " Every 

 brand examined this year, with two exceptions, was accompanied by a guaranty 

 as required by law. A large number, about one-third, of these guaranties, how- 

 ever, were defective in respect to phosphoric acid, either the total or available 

 phosphoric acid alone being given. 



" The quality of the fertilizers was excellent, with but few exceptions. 

 Water-soluble nitrogen was present in 325 samples, 153 of which contained ni- 

 trogen in the form of niti'ates, 243 in the form of ammonia salts, while in 73 

 brands both of these soluble forms were present. Thirty-two brands contained 

 the potash in form of sulphate. 



" There were 276 failures to reach the guaranty. These failures were dis- 

 tributed among 236 brands, 200 being deficient in one element, 32 in two ele- 

 ments, and 4 brands in all three elements." 



Fertilizers as sold, 1909, A. McGill (Lab. Inland Rev. Dept. Canada Bui. 

 186, pp. 13). — This bulletin reports the results of analysis and valuation of 66 

 samples of fertilizers collected during May and June, 1909. Of this number 

 38 samples were found to be up to the guaranteed values. 



