No. 2, September, 1921] SOIL SCIENCE 167 



10G2. Wyant, Zae Nortiiuup. A comparison of the technic recommended by various 

 authors 'or quantitative bacteriological analysis of soil. Soil Sci. 11 : 29.^303 1921. — A study 

 of the literature and analysis of the methods found there for the quantitative bacteriological 

 analysis of soil are presented. — W. J. Robbins. 



LIME STUDIES 



1063. Hartwell, Burt L. Need for lime as indicated by relative toxicity of acid soil 

 conditions to different crops. Jour. Amer. Soc. Agron. 13: lOS-112. 1921. — The kind of plant 

 to be grown determines, more than any other factor, the amount of lime to apply to the soil. — 

 F. M. Schertz, 



1064. MacIntire, W. H. Report on the lime absorption coefficient of soils. Jour. Assoc. 

 Official Agric. Chem. 4: 389-390. 1921. — The author recommends the Jones method, as fol- 

 lows: To 5.6 gm. of soil add 0.5 gm. of calcium acetate (tested reagent), place in a mortar 

 and mix; add water to make a fairly stiff paste. Pestle for 20 seconds, add .30 cc. of water, 

 and continue the mixing for 30 seconds. Wash into a 200 cc. flask and keep the bulk down to 

 about ICO cc. Let stand, with occasional shaking, for 15 minutes. Make up to a bulk of 200 

 CO., mix, and filter through a dry filter. Discard the first 10-15 cc, which may be cloudy; 

 a Biichner funnel is recommended for filtering. Titrate 100 cc. of the clear filtrate, using 

 phenolphthalein as an indicator, with N/lO NaOH. This reading multiplied by 2 gives the 

 number of cc. of N/lO alkali required to neutralize the acetic acid in 200 cc. of the solution. 

 This figure times the factor 1.8 times 1000 indicates the pounds of CaO required per 2,000,000 

 pounds of soil. — F. M. Schertz. 



1065. Piper, C. V. The symposium on liming. Jour. Amer. Soc. Agron. 13:89-90. 1921. — 

 A brief synopsis of definitely known facts and the more or less controversial problems in 

 regard to the agricultural use of lime. — F. M. Schertz. 



1066. Schollenberger, C. J. Lime requirements and reaction of lime materials with 

 soil. Soil Sci. 11 : 261-276. 1921. — Various lime materials were mixed with soil in undrained 

 pots and at intervals the residual carbonate, accumulated nitrate, and lime requirement 

 were determined. Caustic lime was most reactive followed by precipitated calcium carbon- 

 ate and "dicalcium silicate"; high-calcium limestone, calcite, and magnesite; natural carbonate 

 dolomite; and blast furnace slag. The interaction of soil constituents and calcium carbonate 

 is sufiiciently regular and quantitative to show the lime requirement based upon the reaction. 

 The preparation of the sample, temperature, and time allowed for the determination are of 

 considerable importance. Heating is not undesirable in a perfect lime-requirement test. — 

 W. J. Robbins. 



1067. Worth, F. G., and Po Saw Maung. Absorption of lime by soils. Mem. Dept. 

 Agric. India Chem. Ser. 5: 157-171. 1919. — The lime-absorbing power of a number of local 

 soils was studied by the addition of a measured amount of calcium bicarbonate to a weighed 

 amount of soil, the mixture digested for 6 hours, then filtered and titrated. A theoretical 

 discussion of the results is given. — J. J. Skinner. 



PEAT 



1068. AiTER, P. A. Stjbramania. The gasses of swamp rice soils. Part V. A methane- 

 oxidizing bacterium from rice soils. Mem. Dept. Agric. India Chem. Ser. 5: 173-lSO. 1920. — 

 The oxidation of methane in paddy rice soils is caused by the bacterium B. fluorescens lique- 

 faciens. Organic matter interferes with the bacterium; the oxidation proceeds in purely 

 mineral media. — /. J. Skinner. 



1069. Alway, F. J. Experimental work on Minnesota peat soils. Jour. Amer. Peat 

 Soc. 14: 40-47. 1921. 



1070. Beattie, J. H. Truck growing on muck in the Kankakee marsh of northern Indiana. 

 Jour. Amer. Peat Soc. 14: 32-39. 1921. — Onions, cabbage, and celery were grown. Applica- 



