138 SOIL SCIENCE [Bot. Absts., Vol. V, 



SOIL SCIENCE 



J. J. Skinner, Editor 

 F. M. Schertz, Assistant Editor 



GENERAL 



9S0. Anonymous. The value of lupins in the cultivation of poor, light land. Sci. Amer. 

 Supplem. 88:265. 1919. [Abstract of paper read before Agricultural Section, British Assoc. 

 Adv. Sci., by A. W. Oldershaw. (See Bot. Absts. 5, Entry 47.)] Reprinted in Sci. Amer. 

 Supplem. 88: 321. 1919. 



981. Bear, Firman E., and J. R. Royston. Nitrogen losses in urine. Jour. Amer. 

 Soc. Agron. 2 : 319-326. 1919. — The paper gives the results of losses of nitrogen from urine 

 which has been stored under various conditions. Urine exposed to the air lost over 92 per 

 cent of its nitrogen during 8 weeks when the average temperature was 38°C. When urine was 

 not exposed to the air practically no losses took place. Litter allowed to dry out and remain 

 dry lost 20 per cent of its nitrogen content while litter which was kept moist by daily additions 

 of water lost over 97 per cent of its nitrogen. Samples protected with kerosene lost approxi- 

 mately 6 per cent of their nitrogen in 8 weeks. — F. M. Schertz. 



982. Clevenger, Clinton B. Hydrogen-ion concentration of plant juices. I. The ac- 

 curate determination of the hydrogen-ion concentration of plant juices by means of the hydrogen 

 electrode. Soil Sci. 8: 217-226. 1919— See Bot. Absts. 5, Entry 876. 



983. Clevenger, Clinton B. Hydrogen-ion concentration of plant juices. II. Factors 

 affecting the acidity of hydrogen-ion concentration of plant juices. Soil Sci. 8: 227-242. 1919. 

 —See Bot. Absts. 5, Entry 877. 



984. Conner, S. D. The effect of zinc in soil tests with zinc and galvanized iron pots. 

 Jour. Amer. Soc. Agron. 12 : 61-64. 1920. — The author found that acid soils when placed in 

 zinc or galvanized pots, unless limed sufficiently, acted upon the zinc of the pots which were 

 insufficiently protected by the granulated paraffine coating. The water-soluble Zn salts 

 which were found in the soil caused the crops to fail the second season. The action of acid 

 soils on Zn is evidence that soils contain true acids. No good protective coating for the pots 

 was found. — F. M. Schertz. 



985. Frear, William, and C. L. Goodling. I. Cost of burning lime in the stack or 

 heap. II. Supplementary report upon the limestone resources of Pennsylvania. Pennsylvania 

 Agric. Exp. Sta. Bull. 157. 23 p., 4 fig. April, 1919. 



986. Hepner, Frank E. Wyoming forage plants and their chemical composition. Wyo- 

 ming Agric. Exp. Sta. Rept. 28: 117-128. 1917-18— See Bot. Absts. 5, Entry 26. 



987. Hoagland, D. R. Relation of nutrient solution to composition and reaction of cell 

 sap of barley. Bot. Gaz. 68: 297-304. 1919.— See Bot. Absts. 5, Entry 859. 



988. Kelley, W. P., and E. E. Thomas. The effects of alkali on citrus trees. Cali- 

 fornia Agric. Exp. Sta. Bull. 318: 305-337. 1920. 



989. Martin, J. C, and A. W. Christie. Effect of variation in moisture content on the 

 water-extractable matter of soils. Jour. Agric. Res. 18: 139-143. 1919. — The water-soluble 

 constituents of two soils of very different types have been studied at four moisture contents. 

 The moisture contents approaching the air dry condition show a decided tendency to depress 

 the nitrates and potash in both soils and the sulfates in the silty clay loam only. These de- 

 pressions are reflected in the total dissolved material. The excess water in the sandy loam 



