FERTILIZERS. 1 029 



exhaiiwtiMl, tliat tlic complete fertilizers <;ave tlie liighest results throujiliout, that the 

 effect of the ph()sj)hates depended very largely upon their linene.«s and was greatly 

 increased by the addition of nitrogen and potash. The most lasting effect was 

 observed in case of coarse and slowly decomposing bone, followeil l)y steamed bone 

 meal with nitrate of potash and dissolved bone. "Generally the residts show that 

 the manures that stood somewhat low in the lirst turnip crop (in conscMjuence of 

 rough division) stand relatively higher in the grass — bones now standing above all 

 the other manures; coprolite standing above superphosphate; and nitrates, which 

 stoo<l lowest in the turnips, now exerting their effect in the fourth year, the grass 

 crop being one that is responsive to nitrogen." 



Deep culture and the turning under of green manures and barnyard ma- 

 nure, Woi)AK(i (Drill. Ldiiihr. I'lrsxi, ..'!> (190.J), Xn. J.',, jt. U..'). — A plea for a 

 thorough study of this sul)ject. 



Deep culture and turning under green crops and barnyard manure ( Dial. 

 Landir. I'rrx><r, j:i [IHOJ], No. JJ, pj>. 1S5, ISO). — A general discussion of this subject. 



Green manuring with lupines and the use of nitrogenous fertilizers, C. 

 SCHKEIBKK [Rcr. (ini. A<jri)ii. [Loiinilii], 10 (I'JOl), Xu. 11, pp. 4SI-4SS, Jit/. 1). — The 

 author concludes from the results of experiments that the nitrification of lupines as 

 green manure proceeds tt)0 slowly to dispense with the addition of an active nitroge- 

 nous fertilizer. In this connection nitrate of soda was foun<l preferable to sulphate 

 of ammonia. The renovation of the soil by means of green manuring with lupines 

 and a supplementary ajjplication of commercial fertilizers is considered economical. 



Bokhara clover as a nitrogen collector, Bannert {Devi. Landw. Fresse, 29 

 {190-2), Xo. 22, i>. 1S4).~X brief note. 



Compost formulas (Bui. Xuiih ('(iruUiia State Bd. Aijr., 2,i {1902), No. 3, pp. 

 31-34). — Formulas and instructions are given for the preparation of composts of barn- 

 yard manure, cotton seed, and cotton-seed meal with acid phosphate and kainit. 

 The injurious action of lime in composts is briefly referred to. 



Fertilizers and the fertilization of the soil, A. Larbaletkiek {Les evgrais et la 

 fciiilisatloii du sol. D'tri.s: ./. B. Bdllllrir A- Son, 1901, pp. 332, fign. 74)- 



Contribution to the study of the feeding of plants with phosphorus, 

 T. ScHLOEsixcJ (Compt. Bend. Acad. ,Sci. Paris, 134 {1902), Xo. 1, pp. f)3-55,fi(js. 2). — 

 Previous investigations along this line are referred to and determinations of phos- 

 phoric acid soluble in distilled and recently boiled water in 2 soils, one very rich in 

 soluble phosphoric acid, the other very poor, are reported. Small lots of soil (40 to 

 100 gm.) were repeatedly (10 to 11 times) shaken up with relatively large amounts 

 of water ( 1,750 to 1,8.".0 cc. ), the solutions clarified with a small amount of calcium 

 nitrate ( 100 mg. per liter), and j)hosphoricacid determined by the molybdic method. 

 Parallel tests were made on each soil, cultivated and uncultivated, and kept uniformly 

 moist. The phosphoric acid in each water extract is shown in tal)les and diagrams. 

 The total soluble phosphoric acid was 150.2 mg. per kilogram in the uncultivated 

 soil rich in this constituent and 122.1 mg. in the same soil after growth of a crop 

 (corn), a difference of 2S.1 mg. ; 14. ;« mg. in the uncultivated soil poor in soluble 

 phosphoric acid and «.,S mg. in the cropped soil, a difference of 5.53 mg. For the 36 

 kg. of soil used for each experiment with corn the difference was in the first case 

 1,012 ing., in the second 199 mg. Analyses of the corn plants showed that they took 

 up in the first case 1,115 nig. of phosphoric acid, in the second 451 mg. 



The utility of alkaline phosphatic manures, J. Huohks (,SW. Ainer. Sup., 53 

 {1902), Xo. 137.5, pp. 22034-220o'i ) . — 'Si>{ei\ from another source (K. S. R., 13, p. 234). 



Increasing the calcium phosphate content of phosphorite, K. J. Lissenko 

 {Zap. Imp. Bass. Techn. Obscldsch., 35 {1901), p. 825; ahs. ni Chem. Zty., 2G {1902), 

 Xo. 13, Bepert., p. r,2).—Vi\ a process of grinding and siftnig a large j)roportion of 

 the sanil in phosphorites may be removed and the content of pure calcium phos- 



1302— No. 11—02 3 



