Tim Crews

Crews, T.E. and M.B. Peoples. Synchrony of nitrogen supply and demand in legume versus fertilizer-based agroecosystems and potential improvements with perennials. Nutrient Cycling in Agroecosystems, In review

Crews, T.E. Perennial grains and endogenous nutrient supplies. Renewable Agriculture and Food Systems. In review

Loeser, M.R., T.D. Sisk and T.E. Crews. Evidence of increased aboveground productivity in a semi-arid grassland in response to defoliation and grazing. Journal of Rangeland Ecology, In review.

Crews, T.E., J. Brockwell, and M.B. Peoples. Host-rhizobia interaction for effective inoculation and evaluation of the potential use of the ureide assay to monitor the symbiotic performance of tepary bean (Phaseolus acutifolius A. Gray). Soil Biology and Biochemistry, In press

Crews, T.E. and M.B. Peoples. 2004. Legume versus fertilizer sources of
nitrogen: Ecological tradeoffs and human needs. Agriculture, Ecosystems and Environment 102:279-297

Vitousek, P.M., K. Cassman, C. Cleveland, T. Crews, C.B. Field, N. Grimm, R.W. Howarth, R. Marino, L. Martinelli, E. Rastetter, J.I. Sprent. Towards an ecological understanding of biological nitrogen fixation. 2002 Biogeochemistry 57/58:1-45

Crews, T.E., L.M. Kurina and P.M. Vitousek. Organic matter and nitrogen accumulation and nitrogen fixation during early ecosystem development in Hawaii. Biogeochemistry 52:259-279

Fuhrmann, K.N. and T.E. Crews. Long term effects of vegetation treatments in the chaparral transition zone. Rangelands. 23:13-16.

Loeser, M.R., T.D. Sisk, and T.E. Crews. Plant community responses to livestock grazing: an assessment of alternative management practices in a semi-arid grassland. In: Vance,R.K., C.B. Edminster, W.W. Covington, and J.A. Blake, comps. Ponderosa pine ecosystems restoration and conservation: steps toward stewardship; 2000 April 25-27; Flagstaff, AZ. Proceedings RMRS-P-22. Ogden, UT: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station.188 p.

Loeser, M.R., T.D. Sisk, T.E. Crews, K. Olsen, C. Moran, C. Hudenko. Reframing the grazing debate: Evaluating ecological sustainability and bioregional food production. Proceedings of the Fifth Biennial Conference of Research on the Colorado Plateau. In: van Riper, C., III, K.A. Thomas, and M.A. Stuart, editors. Proceedings of the Fifth Biennial Conference of Research on the Colorado Plateau. U.S. Geological Survey/FRESC Report Series USGSFRESC/COPL/2001/24.

Crews, T.E. The presence of nitrogen fixing legumes in terrestrial communities: Evolutionary vs. ecological considerations. Biogeochemistry. 46:233-246

Sisk. T.D., T.E. Crews, R.T. Eisfeldt, M. King and E. Stanley. Assessing impacts of alternative livestock management practices: Raging debates and a role for science. Pp. 89-103 In: Proceedings of the Fourth Biennial Conference of Research on the Colorado Plateau. C. Van Riper III and M. Stuart (editors). Report Series USGSFRESC/COPL/1999/16

Crews, T.E. 1997. We need to sign the global warming treaty. Op/ed special article to the Prescott Courier-12/7 and Tucson Citizen-12/8

Vitousek, P.M., O.A. Chadwick, T.E. Crews, J.H. Fownes, D.M. Hendricks and D. Herbert. 1997. Soil and ecosystem development across the Hawaiian Islands. GSA Today (Geological Society of America Bulletin). 7:1-9

Crews, T.E. The supply of phosphorus from native, inorganic phosphorus pools in continuously cultivated Mexican agroecosystems. Agriculture, Ecosystems and the Environment. 57:197-208

Raich, J.W., A.E. Russell, T.E. Crews, H. Farrington and P.M. Vitousek. Nitrogen and phosphorus stimulate plant growth on young lava flows in Hawaii. Biogeochemistry 32:1-14

Crews, T.E., C.H. Mohler and A. Power. Energetics and ecosystem integrity: the defining principles of sustainable agriculture. American Journal of Alternative Agriculture 6:146-149

Crews, T.E. and S.R. Gliessman. Raised field agriculture in Tlaxcala, Mexico: An ecosystem perspective on maintenance of soil fertility. American Journal of Alternative Agriculture 6:9-16