| Total carbon, organic carbon, and organic matter DW Nelson, LE Sommers Methods of Soil Analysis: Part 2. Chemical and microbiological properties …, 1982 | 16212* | 1982 |
| Chemical and microbiological properties DE Nelson, LE Sommers Methods of Soil Analysis: Part 2, 539-579, 1982 | 10587* | 1982 |
| Total carbon, organic matter, and carbon DW Nelson, LE Sommers Methods of soil analysis. Part 2. Chemical and microbiological properties …, 1982 | 10581* | 1982 |
| Total carbon, organic matter, and carbon DW Nelson, LE Sommers Methods of soil analysis. Part 2. Chemical and microbiological methods, 539-579, 1982 | 10579* | 1982 |
| Total carbon, organic matter, and carbon DW Nelson, LE Sommers Methods of soil analysis. Part 2. Chemical and microbiological properties …, 1982 | 10579* | 1982 |
| Total carbon, organic carbon, and organic matter. DW Nelson, LE Sommers Methods of soil analysis. Part 2. Chemical and microbiological properties …, 1982 | 10559 | 1982 |
| Total carbon, organic carbon, and organic matter DW Nelson, LE Sommers Methods of soil analysis. Part 2. Chemical and microbiological properties …, 1982 | 10555 | 1982 |
| Total carbon, organic carbon, and organic matter DW Nelson, LE Sommers Methods of soil analysis part 3—chemical methods, 961-1010, 1996 | 5849 | 1996 |
| Phosphorus SR Olsen, LE Sommers Page, ALH Miller and DR Keeney (eds.). Methods of Soil Analysis. Part 2, 403-430, 1982 | 1205* | 1982 |
| Determination of total nitrogen in plant material 1 DW Nelson, LE Sommers Agronomy Journal 65 (1), 109-112, 1973 | 871 | 1973 |
| Chemical composition of sewage sludges and analysis of their potential use as fertilizers 1 LE Sommers Journal of Environmental Quality 6 (2), 225-232, 1977 | 540 | 1977 |
| Determination of total phosphorus in soils: A rapid perchloric acid digestion procedure 1 LE Sommers, DW Nelson Soil Science Society of America Journal 36 (6), 902-904, 1972 | 401 | 1972 |
| Evaluation of metals in wastewater sludge RC Stover, LE Sommers, DJ Silviera Journal (Water Pollution Control Federation), 2165-2175, 1976 | 392 | 1976 |
| Total nitrogen analysis of soil and plant tissues DW Nelson, LE Sommers Journal of the Association of Official Analytical Chemists (USA), 1980 | 378 | 1980 |
| A rapid and accurate procedure for estimation of organic carbon in soils DW Nelson, LE Sommers Proceedings of the Indiana Academy of Science 84, 456-462, 1974 | 321 | 1974 |
| Interlaboratory Comparison of a Standardized Phosphorus Adsorption Procedure 1 PS Nair, TJ Logan, AN Sharpley, LE Sommers, MA Tabatabai, TL Yuan Journal of Environmental Quality 13 (4), 591-595, 1984 | 254 | 1984 |
| A Simple Digestion Procedure for Estimation of Total Nitrogen in Soils and Sediments 1 DW Nelson, LE Sommers Journal of Environmental Quality 1 (4), 423-425, 1972 | 241 | 1972 |
| Distribution and partitioning of trace metals in contaminated soils near Leadville, Colorado DB Levy, KA Barbarick, EG Siemer, LE Sommers Journal of Environmental Quality 21 (2), 185-195, 1992 | 193 | 1992 |
| Plate-dilution frequency technique for assay of microbial ecology RF Harris, LE Sommers Appl. Environ. Microbiol. 16 (2), 330-334, 1968 | 193 | 1968 |
| Variable Nature of Chemical Composition of Sewage Sludges 1 LE Sommers, DW Nelson, KJ Yost Journal of Environmental Quality 5 (3), 303-306, 1976 | 180 | 1976 |