SOILS KKHIIMZKRS. 723 



Comparison of org-anic nitrogenous fertilizers with nitrate of soda, M. I'orr 

 (Lanilw. Vers, t^tat., 68 (IHOS), Xo. 3-.',, pp. 233-300; abfi. in Chcm. Zig., 32 

 ilUOS), \o. .',S. Ifrpat.. p. 311; Vhcm. Znitbl., JiWS, I, So. 21), pp. 2I!)'J, 2200; 

 Jnur. Vhcm. Hoc. [London], i)J, (1908), A'o. .-,50, II, pp. 727, 728; Chcm. Abx., 

 3 (l!)09), \o. 2, pp. 221, 222; Zcnthl. Af/r. Chcm., 37 (IDOH), \o. 12. pp. 796- 

 805; ZtHchr. .Angew. Chcm., 22 (1909). .\o. 5, p. 2(97).— Blood meal and horn 

 meal wcro mixed in amounts furnisliiiiK <>.2 and 0.4 >;m. of iiitroKt'n with 2r»o jim. 

 of soil and amnumia and nitrates determined in tlie water extract at the begin- 

 ning and after 2, (>, and 12 weeks. Experiments in large cylinders to study the 

 rate of iiitriticatiou and eflect on growth of rye, wlu'at, oats, and carrots in 

 rotation were also made with these materials and with castor-bean meal, raw 

 lioiie meal, dry ground tisli, meat meal, molasses mauur(\ ])oudrette, wool dust, 

 leather meal, etc. 



There was very slight increase of anunonia until after 2 wtH>ks' time, and 

 under the most favoraI)le conditions not more than 14 per cent was found. The 

 .Mddition of cMlcium carbonate but slightly increased the rate of formation of 

 ammonia. 



It was observed that by distillation of the soil extract the tot.il amount of 

 anunonia present was not found, a certain amount, especially in the case of 

 loam soils, being held so firmly that it was not washed out by the water. The 

 dried blood uniformly yielded more ammonia than the horn meal. In no case 

 V\as there a (•(tmi)lete transformation of the organic nitrogen into nitric nitrogen. 

 T'nder the most favorable conditions 72 per cent of the nitrogen was thus trans- 

 formed in the case of dried blood and in case of horn meal about 57 iier cent. 



The relative efficiency of the different materials in the cylinder experiments 

 was on the basis of niti'ate of soda as 100: Blood and horn meal 70; fish meal, 

 castor-bean meal, and meat meal tJO: iioudrette and bone meal 55; molasses 

 manure 40; wool dust 25; and leather meal 10. 



The use of nitrogenous fertilizers and of nitrate of lime, L. Mam'kai'x 

 {Jour. Agr. I'rat., n. -scr., 16 (1908), .Vo. ,?.7, pp. 265-267). — Comparative field 

 tests of nitrate of soda, sulidiate of .inunonia, nitrate of lime, and cyanamid on 

 wheal, barley, sugar bi'els, potatoi's, onions. ;iiid poppies during 1007 are re- 

 ported. 



Tests of the fertilizing value of synthetic calcium nitrate. N. Passerini 

 I 1/// /i'. A rend. Hcon. Agr. (Icorg. I'innzc, 5. xcr., 5 ( t9(f8), \o. 3, pp. 388- 

 392).- lu case of potatoes calcium nitrate and sodium nitrate were about 

 tMpijiliy effective in increasing the total yield and size of tubers. The two 

 nitrates were about eiju.nlly efl'ective in increasing the .vield of wheat. 



New sources of nitrogen, I). A. (iiLciiRisT (Countg Xorlhiimb. Ed. Com., 

 Hill. II, pp. H2, 63). — In comparative tests of calcium cyanamid, sulphate of 

 aimnonia, and nitrate of soda on mangel-wurzels it was found that the lime 

 idtrogen gave poorer results in the dry season of 1005 and better results in 

 the wet season of 11K)7 than the other nitrogenous fertilizers. In the case of 

 oafs in 1007 the lime nitrogen compared favorably with sulphate of anunonia. 

 The fertilizers were used at rates furnishing 50 lbs. each of nitrogen per acre. 



Results of fertilizer experiments with nitrogen lime, Bachmann [Lmidir. 

 Wihiild. Srhlr.i. lloUt.. .^^' {1908), A'o. 31, pp. .')53-555). — Comi>arative tests of 

 nitrogen lime iind sul|)hafe of anunonia applied in the fall and in the spring 

 on rye, oats, potatoes, and grass are rei)orted. 



The nitrogen lime gave the best resnlts with winter grain when applied 

 full ration in the fall about 8 days before seeding and harrowed In. The nitro- 

 gen lime was com|)lefely absorbed by the soil and whr not washed «)Ut of sandy 

 soils during the winter. A fop dressing with nitrogen lime on winter grain 

 771SO— W 3 



