934 EXPERIMENT STATION RECORD. 



0.15 per cent). Phosphoric acid is abundant (0.35 to 0.91 per cent) but 

 very insoluble in 1 per cent citric acid. The proportion of humus and 

 nitrogen is fairly large. 



The Barbican soils contain a large amount of sand (44 per cent) and 

 a small quantity of fine silt and clay (19 per cent). "The chemical 

 analysis shows that there is a plentiful supply of potash [0.22 per cent] 

 and of phosphoric acid [0.2G per cent] soluble in hydrochloric acid, and 

 also that a fair proportion of each of these constituents is soluble in 

 citric acid [0.16 and 0.22 per cent]. On the other hand, there is a strik- 

 ing deficiency of lime as carbonate [0.03 per cent], of humus [1.45 per 

 cent], and of nitrogen [0.08 per cent]." A considerable portion of the 

 lime is believed to be in the form of silicate. 



The Hartlands soils contain a fair amount of sand (39 to 45 per cent), 

 the larger part of which is quite fine. The proportion of fine silt and 

 clay is not excessive (29 to 40 per cent). "These soils are fairly rich 

 in potash which is soluble in moderate quantity. . . . The amount of 

 phosphoric acid is not large and the quantity soluble in citric acid is 

 small. . . . The proportion of carbonate of lime is small." 



Influence of atmospheric agents on soil bacteria, M. Crendiropoulos (Rev. 

 Eyg., 20 (1S9S), No. 8, pp. 697-705). 



Purpose, value, and method of field experiments on moor soils, B. Tacke 

 (Landiv. Jahro., 27 (1898), Sup. 4, pp. 414-430, jig. 1). — A general discussion (with plans) 

 of this subject based upon experience at the Moor Experiment Station at Bremen. 



On the presence of ferrous carbonate in the iron deposits of moors, H. Schutte 

 (Landw. Jahrb., 27 (1S9S), Sup. 4, pp. 548-557). — Chemical examinations showing the 

 presence of this substance in a number of samples of bog-iron deposits are reported. 



Cultivation of soil, P. P. Deherain (Compt. Bend. Acad. Sci. Paris, 128 (1899), 

 No. 8, pp. 474-479). — This is a summary of investigations on the influence of differ- 

 ent methods of cultivation, on the water supply, and nitrification in the soil, which 

 has been noted elsewhere (E. S. R., 10, p. 727). 



FERTILIZERS. 



The use and value of seaweed as manure, J. Hendrick ( Trans. 

 Highland and Agr. 8oc, Scotland, 5. ser., 10 (1898), pp. 118-134).— This 

 is a popular article, based principally upon investigations and observa- 

 tions by the author. 1 



Analyses of cut weed or black wrack (Fucus nodosus and F. vesiculo- 

 sus), driftweed, principally Laminaria, and dulse (Rhodymenia palmata) 

 are reported and their fertilizing value as compared with barnyard 

 manure is discussed. 



Comparative field tests of seaweed, barnyard manure, and other fer- 

 tilizers on potatoes were carried out under the supervision of the 

 author in 1895 and 1896 in 3 different localities. 



" [From the result of these experiments] it will be seen that, weight for weight 

 of manure, seaweed gives just as great a crop of potatoes as farmyard manure. 

 When superphosphate is applied along with the seaweed the crop is in every case 



1 See also Agr. Students' Gaz., n.aer., 9 (1898), No. 2, pp. 41-49 (E. S. R., 10, p. 833). 



