244 



EXPERIMENT STATION RECORD. 



IAme content, of Shine soils. 



Stiff clay 



Medium clay 



Light clay low in lime.. 

 Light clay high in lime 

 Sandy soils low in lime 

 Sandy soils high in lime 



Number of 

 analyses. 



i 'miI.. inatc. 



/'< /■ cent. 



0.01 

 .01 

 .06 

 .66 

 .06 



1.15 



Assimila- 

 ble. 



Per cent. 

 0.37 

 .38 

 .34 

 .88 

 .27 

 .47 



Soluble in 

 hydro- 

 chloric 

 acid. 



I'i r ci nt. 

 0. 45 

 .64 



.;.i 



L.61 

 .28 



1.77 



The stiff clays are considered sufficient!)' rich in lime for crop-growing purposes, 

 I nit their mechanical condition will be improved by liming. The sandy and gravelly 

 soils in the northern part of the county, which have been derived from moraines 

 lying on top of the primitive rocks, Keuper, or carboniferous formations, need lime 

 applications, while the light clays (moraine clay) in general contain sufficient lime 

 for crop production. — f. w. woll. 



Cooperative fertilizer experiments in Denmark, E. von Sydow (Malmo. Ldns 

 Kijl. Hush. Sallsk. Kvart., J 904, No. 1, pp. 202-207). — A general discussion of the plan 

 and organization of the experiments. — f. w. woll. 



Increasing the yield by high, phosphoric-acid manuring, P. Wagner (Ztschr. 

 Landw. Kammer Schlesien, 8 (1904), T>- ®4'> obs. in Centbl. Agr. Chem., 33 (1904), No. 

 7, pp. 437-439). — Plat experiments are reported which show that the effect of Thomas 

 slag was felt on grass lands 9 years after its application. Other experiments with 

 oats, rye, clover, beets, peas, etc., extending over 12 years showed that continuous 

 medium applications of slag were continuously beneficial. The slag, however, should 

 be used with caution. The poorer the soil in calcium carbonate, iron, and alumina 

 the smaller the application of phosphoric acid required, and vice versa. The author 

 states also that the richer soils are in phosphoric acid the smaller the applications of 

 nitrogen required. 



Report on experiments in pots in 1902 on the value of the accessory 

 constituents of artificial manures, J. W. Paterson ( West of Scotland Agr. Col. 

 Bui. 20, pp. 19-31) . — Experiments on oats with ammonium sulphate, superphosphate, 

 and kainit are reported. These were compared with pure salts — phosphates of am- 

 monium and potash; sulphates of calcium, sodium, potassium, and magnesium; and 

 chlorids of sodium, potassium, and magnesium. The following conclusions are drawn 

 from the results: 



"Nitrogen, phosphates, and potash are the important constituents of artificial 

 manures. In supplying these a limited amount of sulphuric acid as sulphate is desir- 

 able in order to obtain a full return. Such sulphate tends to increase the grain as 

 distinct from the straw of oats. The sulphate in a commercial mixture should not 

 be overdone, however, to the exclusion of chlorids (muriates). In giving a complete 

 manure, the choice in regard to the best form of potash should be decided by whether 

 the nitrogenous and phosphatic manures contain sulphate. If they do not, muriate 

 of potash should not be chosen. If they do, sulphate of potash should be neglected 

 for some of the other forms of potash." 



Complete humus fertilizers, J. Dumont (Compt. Rend. Acad. Sri. Paris, 138 

 (1904), No. 23, pp. 1429-1431). — An account is given of experiments with a humus 

 fertilizer prepared by treating a black humus soil containing 2 per cent of nitrogen 

 with a concentrated potash solution in which aluminum phosphate had been dis- 

 solved. The dried product contained soluble matter (humates) 50.4 per cent, nitro- 

 gen 1.6 per cent (0.98 per cent soluble), phosphoric acid 2.9 per cent (1.34 per cent 

 soluble), potash 5.5 per cent (all soluble). 



