FERTILIZERS. 



933 



thermostat at 38° C. for 3 nionth.« and moistened with water and soil extract to set 

 up decomposition. The prineipal results are summarized in the followinir table: 



Availability of different forms of nitrogen in manure. 



Kind of manure. 



Composted cattle manure: 



Hottest 



Field te.st 



Cattle manure, preserved 

 with superphosphate — 



Pot test 



Cattle manure, preserved 



with kainit— Pot test 



Composted horse manure: 



Pot test 



Field test 



Fresh cattle manure (1): 



Pot test 



Field test 



Fresh cattle manure (2)— 



Pot test 



Fresh horse manure — Pot 



test 



Fresh horse excrement- 

 Pot test 



Dog manure— Pot test 



Composted yard manure — 



Pot test 



Sheep manure (1) — Pot test. 

 Sheep manure (2) — Pot test. 



Nitrogen in manure. 



Total. 



Perct. 



[ 0. 605 



.■153 

 .425 



.398 



..562 



.323 

 .405 



.531 



.900 



1.279 



Soluble in piep- 

 sin solution. 



After 

 At time decom- 

 of use. posi- 

 I tion. 



jPer ct. \ Per ct. 

 0.163 I 0.212 



.271 

 .217 



.358 



.223 

 .297 



.203 

 .305 



.308 

 .391 



.230 

 .193 



.179 



.241 



.127 

 .175 



.260 

 .494 

 .866 



Plants utilized of— 



Total nitrogen. 



On 

 heavy 

 soil. 



Pel- ct. 

 f 14.2 



I 8.6 



23.0 

 20.0 



17.9 



14.8 



14.3 

 9.2 



28.5 



17.7 

 24.4 

 22.1 



On 



light 

 soil. 



Perct. 

 8.9 

 10.4 



18.4 



9.0 



18.9 

 14.5 



8.2 

 10.2 



.6 



5.0 



2.1 

 13.2 



11.0 

 19.2 

 19.7 



Nitrogen solu- 

 ble in pepsin 

 solution at 

 beginning. 



I Nitrogen solu- 

 ble in pepsin 

 I solution after 

 I decomposition. 



On 



heavy 



soil. 



Per ct. 

 52.6 

 31.9 



38.5 

 39.2 



26.2 

 21.6 



22.8 

 14.5 



13.9 

 18.4 



30.6 

 56.3 

 28.6 



On On 



light heavy 

 soil. soil. 



Perct. 

 33.2 

 38.6 



30.7 



17.6 



27.7 

 21.2 



13.0 

 16.3 



1.1 



9.4 



3.3 



50.8 



18.9 

 44.1 

 25.5 



Per ct. 

 40.5 

 24.5 



45.4 

 44.0 



36.0 

 29.7 



36.0 

 23.0 



17.3 

 22. 6 



36.4 

 44.5 

 32.7 



On 

 light 

 soil. 



Perct. 

 2.5.6 

 29.6 



36.2 



19.8 



38.1 

 29.2 



20. 5 

 25. 7 



1.3 



11.6 



5.4 

 30.5 



22.5 

 34.9 

 29.0 



From the table it appears that there is sometimes a decrease, sometimes an increase, 

 of pepsin- soluble nitrogen as a result of decomposition, showing that the setting free 

 of difficultly soluble and the fixation of easily soluble nitrogen compounds varies with 

 the kind of manure. 



Goat manure, D. M.a.rtelli {Studi e Ricerche 1st. Lab. Clam. Agr. Univ. Pisa, 1900- 

 1901, Xo. 17, pp. 19-26). — Analyses are reported as follows: 



Fertilizing constituents of goat manure. 



Guano collected on islands in the Bed Sea near the Colony of £ritrea, 

 D. Martelli {Studi e Ricerche 1st. Ijxb. Cliitn. Agr. Univ. Pisa, 1900-1901, No. 17, 

 pp. 107-123). — In the analyses reported the nitrogen varies from 0.784 to 15.029 per 

 cent, the phosphoric acid from 11.706 to 28.083 per cent, and the i>otash from 0.224 to 

 1.781 per cent. 



Vegetation experiments on the fertilizing action of diflTerent phosphates, 

 O. Kellnek and O. BorrcHEU [Cliem. Ztg., 26 {1902), No. 1, pp. S, 9). — The experi- 



