References
- Alway , F. J. , Marsh , A. W. and Methley , W. J. 1938 . Sufficiency of atmospheric sulfur for maximum crop yields . Soil Sci. Soc. Am. Proc. , 2 : 229 – 238 .
- Caldwell , A. C. , Seim , E. C. , Rehm , G. W. and Grava , J. 1972 . Sulfur Studies in the Field on a Sulfur Deficient Minnesota Soil St. Paul, Minnesota : Minnesota Agricultural Experiment Station, University of Minnesota . Technical Bulletin 284
- Cowling , D. W. and Jones , L. H.P. Sulphur and amino acids fractions in perennial ryegrass influenced by soil and atmospheric supplies of sulphur . Oct. 3–4, 1978 , Wexford, Ireland. Proceedings of Sulphur in Forages Symposium , Dublin, , Ireland : An Foras Taluntais . Johnstown‐Castle Research Station
- Erdman , L. W. and Bollen , W. B. 1925 . Field experiments with gypsum in Iowa . Iowa Agricultural Experiment Station Bulletin , 232 : 99 – 119 .
- Fox , R. L. 1982 . Some highly weathered soils of Puerto Rico. 3. Chemical properties . Geoderma , 27 : 139 – 176 .
- Fox , R. L. , Flowerday , A. D. , Hosterman , F. W. , Rhoades , H. F. and Olson , R. A. 1964 . Sulfur Fertilization for Alfalfa Production in Nebraska Lincoln, Nebraska : University of Nebraska, College of Agriculture . Research Bulletin 214
- Hart , E. B. and Peterson , W. H. 1911 . Sulfur Requirements of Farm Crops in Relation to the Soil and Air Supply Madison, Wisconsin : Wisconsin Agricultural Experiment Station, University of Wisconsin . Research Bulletin 14
- Herzig , R. , Urech , M. , Liebendorfer , L. , Ammann , K. , Guecheva , M. and Landolt , W. 1989 . “ Lichens as biological indicators of air pollution in Switzerland: passive biomonitoring as a part of an integrated measuring system for monitoring air pollution ” . In Element Concentration Cadasters in Ecosystems Workshop Edited by: Lieth , H. and Merkert , B. 317 – 332 . New York : VCH Publishers . March 13–15, Osnabruck, Federal Republic of Germany
- Lamond , R. E. , Whitney , D. H. and Marsh , B. H. 1995 . Sulfur fertilization of smooth bromegrass in Kansas . Agronomy Journal , 87 : 13 – 16 .
- Lomborg , B. 2001 . The Skeptical Environmentalist 172 Cambridge, , UK : Cambridge University Press . Chapter 15
- Pasricha , N. S. and Fox , R. L. 1993 . Plant nutrient sulfur in the tropics and subtropics . Advances in Agronomy , 50 : 209 – 269 .
- Schnug , E. 1991 . Sulphur nutritional status of European crops and consequences for agriculture . Sulphur in Agriculture , 15 : 7 – 12 .
- Schnug , E. and Haneklaus , S. 1998 . “ Diagnosis of sulphur nutrition ” . In Sulphur in Agroecosystems Edited by: Schnug , E. 1 – 38 . Dordrecht, , Netherlands : Kluwer Academic Publications .
- Smith , C. W. , Geiser , L. , Gough , L. , McCundry , B. , Ryan , B. and Showman , R. 1993 . “ Species and communities ” . In Lichens as Bioindicators of Air Quality , Colorado Edited by: Huckaby , L. S. 41 – 61 . Ft. Collins : USDA Forest Service . General Technical Report RM‐224
- Tomassini , F. D. , Puckett , K. J. , Richardson , D. H.S. and Grace , B. 1976 . Determination of copper, iron, nickel, and sulphur by x‐ray fluorescence in the Mackenzie Valley, Northwest Territories and the Sudberry District, Ontario . Canadian Journal of Botany , 54 : 1591 – 1603 .
- Wilson , J. E. and Mohnen , V. A. 1982 . An analysis of spatial variability of the ions in precipitation in the eastern United States . Water, Air, and Soil Pollution , 54 : 199 – 213 .