744 



AUTHORS' INDEX 



Houston, H. A., Estimation of humus, 



142. 

 Hunt, T. F., Manure and the rotation, 



616. 



Nitrogen fertilizers, 547. 

 Hutchinson, H. B., Nitrogen assimila- 

 tion, 495. 



Organic matter in soil, 136. 

 Partial sterilization of soil, 470. 



Jenkins, E. H., Availability of fertilizers, 



510. 



Commercial fertilizers, 564. 

 Jodidi, 8. L., Nitrogen compounds, 133. 

 Johnson, S. W., Availability of fertilizers, 



510. 



Composition of soil air, 477. 

 Johnston, J., Early drainage in America, 



630. 

 Jones, C. H., Commercial fertilizer, 562. 



Kellerman, K. F., Lime, 537. 



Nitro-cultures, 462. 



Litmus test, 386. 



Kelley, W. P., Ammonia as plant food, 

 495. 



Magnesium and nitrates, 536. 

 Kellner, O., Ammonia as plant-food, 495. 

 Kelly, M. P., Manganese, 530. 

 Kerr, W. C., Composition of marl, 38. 

 Kiesselbach, T. A., Water requirement 



of corn, 248. 



King, F. H., Absorption and produc- 

 tivity, 368. 



Aspirator, 124. 



Capillary and ground water, 214. 



Capillary movement, 225. 



Drainage and soil temperature, 314. 



Drainage and free water, 237. 



Effect of barometric pressure, 234. 



Effective diameter of soil particles, 

 123. 



Effective surface of soil particles, 

 125. 



Irrigation, 682. 



Land drainage, 627. 



Movement of ground water, 235. 



Pore space in soil, 116, 117. 



Slope and soil temperature, 319. 



Spring plowing, 284. 



Surface tension and temperature, 227. 



Temperature and hygroscopicity, 

 208. 



Water requirement of plants, 247. 



Wind breaks and moisture, 285. 

 Kinnison, C. S., Plasticity, 171. 



Kinsley, A. F., Bacteria in soil, 432. 



Klippart, J. H., Land drainage, 627. 



Knisely, A. L., Acid soil, 383. 



Koch, A., Theory as to effect of anti- 

 septics, 468. 



Konig, J., Catalytic agents, 529. 

 Colloid chemistry, 153. 



Kostytscheff, M. P., Roots and humus, 

 127. 



Krober, E., Bacteria in soil, 438. 



Fermentation and phosphates, 520. 



Kummel, A. B., Soil and geological 

 surveys, 719. 



Lang, C., Radiation, 302. 



Lapham, J. E., Classification of soils of 



United States, 724. 

 Lapham, M. H., Classification of soils 



of United States, 724. 

 Capillary movement, 225. 

 Lawes, J. B., Composition of drainage 



water, 240. 



Nitrogen in plant nutrition, 491. 

 Leather, J. W., Water requirements of 



plants, 247. 



LeClerc, J. A., Acid toxicity, 379. 

 Liebenberg, R. von, Specific heat of 



soils, 294. 

 Liebig, J. J. von, Composition of plants, 



491. 



Law of minimum, 553. 

 Solvent action of roots, 405. 

 Lint, H. C., Sulfur and soil acidity, 382. 

 Lipman, C. B., Bacteria in arid soils, 73. 

 Lipman, J. G., Availability of fertilizers, 



510. 



Fermentation of manure, 591. 

 Green manures, 619. 

 Loew, O., Lime and magnesia, 538. 

 Lohnis, F., Bacteria in soil, 438. 

 Loughridge, R. H., Crop tolerance to 



alkali, 395. 

 Distribution of irrigation water in 



soil, 704. 



Hygroscopic water, 204. 

 Soil separates, 102. 



Lynde, C. J., Capillary movement, 231. 

 Lyon, T. L., Composition of drainage 



water, 372. 

 Legume cultures, 545. 

 Lysimeter tanks, 241. 



McBride, F. W., Estimation of humus, 



142, 144. 

 McCall, A. G., Solution of soil in situ, 



344. 



