1. Staff

Twain Butler, Ph.D. Publications

Publication List

Maulana, F., Kim, K-S, Anderson, J. D., Sorrells, M. E., Butler, T. J., Liu, S., Baenziger, P. S., Byrne, P. F. & Ma, X - F. (2019). Genomic selection of forage quality traits in winter wheat. Crop Science, (epub ahead of print), doi:10.2135/cropsci2018.10.0655.

Maulana, F., Anderson, J. D., Butler, T. J. & Ma, X - F. (2019). Improving dual-purpose winter wheat in the Southern Great Plains of the United States. In Shah Fahad, Abdul Basir (eds), Global Wheat Production. IntechOpen Limited, London, SE19SG - UNITED KINGDO: IntechOpen.

Pittman, J. J. & Butler, T. J. (2019). Forage biomass estimation devices, systems, and methods. United States Patent, US Patent 10,168,149, filed Sep. 23, 2015 and issued Jan. 1, 2019.

Butler, T. J., Biermacher, J. T., Hoffman, J. K. & Interrante, S. M. (2018). Grazing systems research update: Year-round forage options. Noble News & Views, 36 (11), 11-12.

Trammell, M. A. & Butler, T. J. (2018). Noble releases new forage crabgrass cultivar called Impact. Noble News & Views, 36 (11), 8-9.

Bouton, J. H., Motes, B., Trammell, M. A. & Butler, T. J. (2018). Registration of ‘Impact’ Crabgrass. Journal of Plant Registrations, 13 (1), 19-23 doi:10.3198/jpr2018.04.0019crc.

Xing, L., Pittman, J. J., Inostroza, L., Butler, T. J. & Munoz, P. (2018). Improving predictability of multisensor data with nonlinear statistical methodologies. Crop Science, 58 (2), 972-981 doi: 10.2135/cropsci2017.09.0537.

Tamir, H., Kumssa, T. T., Butler, T. J. & Ma, X - F. (2018). Triticale improvement for forage and cover crop uses in the Southern Great Plains of the United States. Frontiers in Plant Science, 9 (1130), doi: 10.3389/fpls.2018.01130.

Trammell, M. A., Butler, T. J., Young, C. A., Widdup, K., Amadeo, J., Hopkins, A. A., Nyaupane, N. P. & Biermacher, J. T. (2018). Registration of ‘Chisholm’ Summer-Dormant Tall Fescue. Journal of Plant Registrations, 12 (3), 293-299 doi:10.3198/jpr2018.01.0001crc.

Tracy, B. F., Foster, J. L., Butler, T. J., Islam, M. A., Toledo, D. & Vendraminif , J. M. (2017). Resilience in forage and grazinglands. Crop Science, 58 (1), 31-42 doi: 10.2135/cropsci2017.05.0317.

Butler, T. J., Celen, A., Webb, S. L., Krstic, D. & Interrante, S. M. (2017). Germination in cool-season forage grasses under a range of temperatures . Crop Science, 57 (3), 1725-1731 doi:10.2135/cropsci2015.10.0647.

Kim, K-S, Anderson, J. D., Webb, S. L., Newell, M. A. & Butler, T. J. (2017). Variation in winter forage production of four small grain species - oat, rye, triticale, and wheat. Pakistan Journal of Botany, 49 (2), 553-559.

Butler, T. J., Stein, J., Pittman, J. J. & Interrante, S. M. (2016). Seedbed preparation and planting depth affect switchgrass establishment and yield. Crop, Forage & Turfgrass Management, 2 (1), doi:10.2134/cftm2016.0012.

Kim, K - S., Anderson, J. D., Newell, M. A., Grogan, S. M., Byrne, P. F., Baenziger, P. S. & Butler, T. J. (2016). Genetic Diversity of Great Plains Hard Winter Wheat Germplasm for Forage. Crop Science, 56 (5), 2297-2305 doi: 10.2135/cropsci2015.08.0519.

Trammell, M. A., Butler, T. J., Hopkins, A. A. & Brummer, E. C. (2016). Registration of NFTW6001 Tall Wheatgrass Germplasm. Journal of Plant Registrations, 10 (2), 166-170 doi:10.3198/jpr2015.09.0053crg.

Pittman, J. J., Arnall, D. B., Interrante, S. M., Wang, N., Raun, W. R. & Butler, T. J. (2016). Bermudagrass, wheat, and tall fescue crude protein forage estimation using mobile-platform, active-spectral and canopy-height data. Crop Science, 56 (2), 870-881 doi:10.2135/cropsci2015.05.0274.

Kim, K - S., Anderson, J. D., Newell, M. A. & Butler, T. J. (2016). Variations of Forage Yield and Nutritive Value in Winter Rye Germplasm. Crop Science, 56 (3), 1018-1024 doi:10.2135/cropsci2015.08.0487.

Butler, T. J. (2015). Introduction to the forage and grazinglands symposium—challenges, opportunities, and applications of grazing research. Crop Science, 55 (6), 2511-2512 doi: 10.2135/cropsci2015.06.0371.

Pittman, J. J., Interrante, S. M. & Butler, T. J. (2015). Response of Forage Chicory to Various Herbicides. Crop, Forage & Turfgrass Management, 1 (1), doi:10.2134/cftm2015.0117.

Interrante, S. M., Hancock, D. & Butler, T. J. (2015). Switchgrass establishment and biomass yield responses to fungicide and insecticide seed treatments. Crop, Forage & Turfgrass Management, 1 (1), 1-6 doi: 10.2134/cftm2014.0041.

Pittman, J. J., Arnall, D. B., Interrante, S. M., Moffet, C. & Butler, T. J. (2015). Estimation of biomass and canopy height in bermudagrass, alfalfa, and wheat using ultrasonic, laser, and spectral sensors. Sensors, 15 (2), 2920-2943 doi:10.3390/s150202920.

Butler, T. J., Celen, A., Webb, S. L., Krstic, D. & Interrante, S. M. (2014). Temperature affects the germination of forage legume seeds. Crop Science, 54 (6), 2846-2853 doi: 10.2135/cropsci2014.01.0063.

Butler, T. J., Interrante, S. M. & Foster, J. L. (2014). Assessing the production and nutritive value of warm-season legumes in Oklahoma and Texas. Forage and Grazinglands, 47 (2), 46-50 doi:10.2134/cs2014-47-2-14edv.

Fike, J. H., Butler, T. J. & Mitchell, R. (2014). The agronomy of switchgrass for biomass. In Luo H., Wu Y., Kole C. (eds.), Compendium of Bioenergy Plants: Switchgrass. (pp. 17-66). Boca Raton: CRC Press.

Kering, M. K., Guretzky, J., Interrante, S. M., Butler, T. J., Biermacher, J. T. & Mosali, J. (2013). Harvest timing affects switchgrass production, forage nutritive value, and nutrient removal. Crop Science, 53, 1809-1817 doi:10.2135/cropsci2012.10.0568.

Kering, M. K., Huo, C., Interrante, S. M., Hancock, D. & Butler, T. J. (2013). Effect of various herbicides on warm-season Grass Weeds and switchgrass establishment. Crop Science, 53 (2), 666-673 doi:10.2135/cropsci2012.04.0252.

Foster, J. L., Guretzky, J., Huo, C., Kering, M. K. & Butler, T. J. (2013). Effects of row spacing, seeding rate, and planting date on establishment of switchgrass. Crop Science, 53 (1), 309–314 doi:10.2135/cropsci2012.03.0171.

Newell, M. A. & Butler, T. J. (2013). Forage rye improvement in the Southern USA: a review. Crop Science, 53 (1), 38-47 doi:10.2135/cropsci2012.05.0319.

Butler, T. J., Muir, J. P., Huo, C. & Guretzky, J. (2013). Switchgrass biomass and nitrogen yield with over-seeded cool-season forages in the Southern Great Plains. BioEnergy Research, 6 (1), 44-52 doi:10.1007/s12155-012-9225-z.

Butler, T. J., Biermacher, J. T., Kering, M. K. & Interrante, S. M. (2012). Production and economics of steers grazing tall fescue with annual legumes or fertilized with nitrogen. Crop Science, 52 (4), 1931-1939 doi: 10.2135/cropsci2011.11.0610.

Singh, R., Interrante, S. M., Butler, T. J. & Young, C. A. (2012). Characterization and effectiveness of co-inoculation of Sinorhizobium strains on annual medics. Crop Science, 52 (2), 932-942 doi:10.2135/cropsci2011.08.0459.

Butler, T. J., Kering, M. K., Huo, C. & Guretzky, J. (2012). Effect of safener, activated-charcoal coated seed, and charcoal bandingon establishment of switchgrass receiving pre-emergent herbicides. Plant Management Network/Forage and Grazinglands, 10 (1), doi: 10.1094/FG-2012-1214-01-RS.

Butler, T. J. & Muir, J. P. (2012). Perspective on forage legume systems for the tallgrass and mMixed-grass prairies of the Southern Great Plains of Texas and Oklahoma. Crop Science, 52 (5), 1971-1979 doi:10.2135/cropsci2011.12.0674.

Kering, M. K., Butler, T. J., Biermacher, J. T., Mosali, J. & Guretzky, J. (2012). Effect of potassium and nitrogen fertilizer on switchgrass productivity and nutrient removal rates under two harvest systems on a low potassium soil. BioEnergy Research, 6 (1), 329-335 10.1007/s12155-012-9261-8.

Butler, T. J. & Malinowski, D. P. (2012). Systems management of perennial and annual grasses. In Young, C.A., Aiken, G.E., McCulley, R.L., Strickland, J.R., Schardl, C.L. (eds.), Epichloae, endophytes of cool-season grasses: Implications, utilization and biology. Ardmore, OK: The Samuel Roberts Noble Foundation.

Biermacher, J. T., Reuter, R. R., Kering, M. K., Rogers, J. K., Blanton, J. R., Guretzky, J. & Butler, T. J. (2012). Expected economic potential of substituting legumes for nitrogen in bermudagrass pastures. Crop Science, 52 (4), 1923-1930 doi:10.2135/cropsci2011.08.0455.

Butler, T. J., Biermacher, J. T., Kering, M. K. & Interrante, S. M. (2012). Production and economics of grazing steers on rye–annual ryegrass with legumes or eertilized with nitrogen. Crop Science, 52 (4), 1931-1939 doi:10.2135/cropsci2011.11.0611.

Butler, T. J., Biermacher, J. T., Interrante, S. M., Sledge, M. K., Hopkins, A. A. & Bouton, J. H. (2012). Production and economics of grazing alfalfa in the Southern Great Plains. Crop Science, 52 (3), 1424–1429 doi:10.2135/cropsci2011.08.0453.

Kering, M. K., Butler, T. J., Mosali, J. & Guretzky, J. (2012). Biomass yield and nutrient responses of switchgrass. BioEnergy Research, 5 (1), 71-78 doi:10.1007/s12155-011-9174-y.

Biermacher, J. T., Interrante, S. M., Bouton, J. H. & Butler, T. J. (2012). The economic potential of grazing-tolerant alfalfa. Ag News and Views, 30 (2), 6.

Kering, M. K., Butler, T. J., Biermacher, J. T. & Guretzky, J. (2012). Biomass yield and nutrient removal rates of perennial grasses under nitrogen fertilization. BioEnergy Research, 5, 61-70 doi:10.1007/s12155-011-9167-x.

Ma, X - F., Tudor, S., Butler, T. J., Ge, Y. X., Xi, Y - J., Bouton, J. H., Harrison, M. J. & Wang, Z - Y. (2012). Transgenic expression of phytase and acid phosphatase genes in alfalfa (Medicago sativa) leads to improved phosphate uptake in natural soils. Molecular Breeding, 30 (1), 377-391 doi: 10.1007/s11032-011-9628-0.

Hopkins, A. A., Young, C. A., Butler, T. J. & Bouton, J. H. (2011). Registration of 'Texoma' MaxQ II Tall Fescue. Journal of Plant Registrations, 5 (1), 14-18 doi: 10.3198/jpr2010.02.0082crc.

Interrante, S. M., Singh, R., Islam, M. A., Stein, J., Young, C. A. & Butler, T. J. (2011). Effectiveness of Sinorhizobium inoculants on annual medics. Crop Science, 51 (5), 2249-2255 doi: 10.2135/cropsci2011.02.0076.

Malinowski, D. P., Butler, T. J., & Belesky, D.P. (2011). Competitive ability of tall fescue against alfalfa as a function of summer dormancy, endophyte infection and soil moisture availability. Crop Science, 51, 1282-1290.

Interrante, S. M., Muir, J. P., Islam, M. A., Maas, A.L. , Anderson, W.F., & Butler, T. J. (2011). Establishment, agronomic characteristics, and dry matter yield of rhizoma peanut genotypes in cool environments. Crop Science, 51 (6), 2256–2261 doi:10.2135/cropsci2011.03.0133.

Butler, T. J., Stein, J., Interrante, S. M., & Malinowski, D. P. (2011). Novel approaches to establishing alfalfa-tall fescue pastures in the Southern Great Plains. Forage and Grazinglands, Plant Management Network, doi:10.1094/FG-2011-0725-01-RS.

Butler, T. J., Pittman, J. J. , & Interrante, S. M. (2011). Evaluation of various pre-emergent and post-emergent herbicides on five summer legumes. Forage and Grazinglands, Plant Management Network, doi:10.1094/FG-2011-0819-01-RS.

Butler, T. J., Interrante, S. M., Malinowski, D. P., & Widdup, K. (2011). Annual medic forage and seed evaluations for the semiarid regions of the Great Plains. Forage and Grazinglands, Plant Management Network, doi:10.1094/FG-2011-0912-01-RS.

Islam, M. A., Biermacher, J. T., Interrante, S. M., Reuter, R. R., Hopkins, A. A., Cook, B. J., Bouton, J. H. & Butler, T. J. (2011). Production and economics of grazing rye-annual ryegrass and tall fescue systems. Agronomy Journal, 103 (2), 558-564 doi:10.2134/agronj2010.0325.

Hopkins, A. A., Young, C. A., Butler, T. J. & Bouton, J. H. (2011). Registration of ‘Texoma’ MaxQ II Tall Fescue. Journal of Plant Registrations, 5 (1)14-18.

Kering, M. K., Biermacher, J. T., Reuter, R. R., Butler, T. J., Springer, J. D., Rogers, J. K., Blanton, J. R., Bouton, J. H. & Guretzky, J. (2010). Economic potential of substituting legumes for synthetic nitrogen in warm season perennial grasses used for stocker cattle grazing/ NF-AG67. In Southern Agricultural Economics Association Annual Meeting ..

Biermacher, J. T., Butler, T. J. & Reuter, R. R. (2010). The economics of novel endophyte tall fescue. Ag News and Views, 28 (12), 6.

Butler, T. J., Young, C. A., Malinowski, D. P., & Widdup, K. (2010). Annual medics (Medicago sp) for the Southern Great Plains of the USA (abstract). In Proceedings 6th Annual International Symposium on the Molecular Breeding of Forage and Turf .Buenos Aires, Argentina: International Herbage Seed Group.

Singe, R., Interrante, S. M., Butler, T. J., & Young, C. A. (2010). Compaison of genetic diversity and symbiotic efficiency of commercial and indigenous Rhizobia from nodules of annual medics grown in different soil pH (abstract). In Proceedings American Forage and Grassland Council Conference Volume 19 2010 Springfield, Mo .Georgetown, Tx: American Forage and Grassland Council.

Interrante, S. M., Foster, J. L. , & Butler, T. J. (2010). Evaluation of summer legumes in Oklahoma and Texas (abstract). In Proceedings American Forage and Grassland Council Conference Volume 19 2010 Springfield, Mo .Georgetown, Tx: American Forage and Grassland Council.

Butler, T. J., Interrante, S. M., Singe, R., Young, C. A., & Malinowski, D. P. (2010). Evaluation of annual medics for Rhizobia specificity, forage yield, seed production and hard seed (abstract). In Proceedings American Forage and Grassland Council Conference Volume 19 Springfield, Mo .Georgetown, Tx: American Forage and Grassland Council.

Pittman, J. J. , Biermacher, J. T., Reuter, R. R., & Butler, T. J. (2010). Evaluation of pre- and post- emergent herbicides to seven warm-season legumes (abstract). In Proceedings American Forage and Grassland Council Conference-Volume 19 Springfield, Mo 2010 .Georgetown, Tx: American Forage and Grassland Council.

Huo, C., Guretzky, J., Stein, J., Interrante, S. M., & Butler, T. J. (2010). The effects of planting date and seeding rate in switchgrass establishment and dry matter yield (abstract). In Proceedings American Forage and Grassland Council Conference Volume 19 2010 Springfield, Mo .Georgetown, Tx: American Forage and Grassland Council.

Stein, J., Butler, T. J., & Malinowski, D. P. (2010). Comparisons of alfalfa-tall fescue row orientations on establishment and persistence under livestock grazing (abstract). In Proceedings American Forage and Grassland Council Conference Volume 19 Springfield, Mo 2010 .Georgetown, Tx: American Forage and Grassland Council.

Muir, J. P., Butler, T. J., Ocumpaugh, W. R., & Simpson, C. E. (2010). ‘Latitude 34’, a perennial peanut for cool, dry climates. Journal of Plant Registrations, 4, 106-108.

Muir, J. P., Butler, T. J., Helton, T. J., & McFarland, M. l. (2010). Dairy manure compost application rate and timing influence bermudagrass yield and nutrient concentration. Crop Science, 50 (5), 2133-2139 DOI:10.2135/cropsci2009.10.0571.

Butler, T. J., Andrae, J. G., & Hancock, D. (2010). Weed management during forage legume establishment. Forage and Grazinglands, Plant Management Network, DOI:10.1094/FG-2010-0426-01-MG.

Kering, M. K., Biermacher, J. T., Reuter, R. R., Butler, T. J., Springer, J. D., Rogers, J. K., Blanton, J. R., Bouton, J. H., & Guretzky, J. (2010). Economic potential of substituting legumes for synthetic nitrogen in warm season perennial grasses used for stocker cattle(abstract). In Southern Agricultural Economics Association 42nd Annual Meeting .Orlando, Florida: Southern Agricultural Economics Association.

Butler, T. J., & Muir, J. P. (2010). ‘Rio Rojo’ smooth-seeded wild bean, a native annual forage legume. Journal of Plant Registrations, 4 (2), 103-105 DOI:10:3198/jpr2009.08.0443crc.

Guretzky, J., Reuter, R. R., Biermacher, J. T., Springer, J. D., Butler, T. J., Aljoe, H. D. , Rogers, J. K., & Cook, B. J. (2009). Economic potential of stocker cattle grazing legume-interseeded bermudagrass(abstract). In Joint Annual Meeting ADSA.CSAS.ASAS 2009 (pp. 573 Article# 757). Montreal, Quebec, Canada: ASAS.

Biermacher, J. T., Reuter, R. R., Cook, B. J., Islam, M. A., Hopkins, A. A., Bouton, J. H., & Butler, T. J. (2009). Economic feasibility of stocker cattle grazing tall fescue infected with a novel endophyte in the Southern Great Plains(abstract). In Joint Annual Meeting ADSA,CSAS,ASAS 2009 (pp. 573 #758). Montreal,Quebec, Canada: ASAS.

Guretzky, J., Butler, T. J., Mattox, M., & Glidewell, C. (2008). Forage potential of temperate legumes with perennial grasses in the Southern Plains(abstract). In Joint Meeting of the Society for Range Management and the American Forage and Grassland Council/January ..

Butler, T. J., Huo, C., & Guretzky, J. (2008). Effects of planting date, seeding rate, and row spacing on lowland switchgrass establishment (abstract). In Proceedings of ASA-CSSA-SSSA Annual Meeting .Houston, Texas: ASA-CSSA-SSSA.

Butler, T. J., Han, K. J., Muir, J. P., Weindorf, D. C. & Lastly, L. (2008). Dairy manure compost effects on corn silage production and soil properties. Agronomy Journal, 100 (6), 1541-1545 DOI:10.2134/agronj2008.0033.

Butler, T. J., Islam, M. A., & Muir, J. P. (2008). Establishing cool-season perennial grasses into former annual grass pastures in the Southern Great Plains. Forage and Grazinglands, Plant Management Network, DOI:10.1094/FG-2008-0911-01-RS.

Muir, J. P., Butler, T. J., Wolfe, R. M. & Bow, J. R. (2008). Harvest techniques change warm-season annual legume forage yield and nutritive value. Agronomy Journal, 100 (3), 765-770 DOI: 10.2134/agronj2007.0042.

Butler, T. J. (2008). Can legumes and perennial grasses be grown together? Midwest Cattleman, 14 (1), 24 & 48.

Helton, T. J., Butler, T. J., McFarland, M. l., Hons, F. M., Mukhtar, S. & Muir, J. P. (2008). Effects of dairy manure compost and supplemental inorganic fertilizer on coastal bermudagrass. Agronomy Journal, 100 (4), 924-930 DOI:10.2134/agronj2007.0305.

Bow, J. R., Muir, J. P., Weindorf, D. C., Rosiere, R. E., & Butler, T. J. (2008). Integration of cool-season annual legumes and dairy manure compost with switchgrass. Crop Science, 48 (4), 1621-1628 DOI: 10.2135/cropsci2007.12.0697.

Guretzky, J. & Butler, T. J. (2008). Cool-Season legumes for southern pastures. Ag News and Views, 26 (7), 3.

Butler, T. J. (2008). Can legumes and perennial grasses be grown together? Ag News and Views, 26 (1), 3.

Malinowski, D. P., Pinchak, W. E., Kramp, B. A., Zuo, H. & Butler, T. J. (2007). Supplemental irrigation and fall dormancy effects on alfalfa productivity in a semiarid, subtropical climate with a bimodal precipitation pattern. Agronomy Journal, 99 (3), 621-629 DOI:10.2134/agronj2006.0056.

Ocumpaugh, W. R., Muir, J. P., Butler, T. J., & Reed, R. L. (2007). Registration of ‘Devine’ Little Burr Medic. Journal of Plant Registrations, 1, 31-32 DOI:10.3198/jpr2006.05.0338crc .

Butler, T. J., Muir, J. P., Islam, M. A. & Bow, J. R. (2007). Rhizoma peanut yield and nutritive value are influenced by harvest technique and timing. Agronomy Journal, 99 (6), 1559-1563 DOI:10.2134/agronj2007.0035.

Islam, M. A., & Butler, T. J. (2007). Evaluation of wild bean for forage potential(abstract). In A joint conference of the Northeastern Branch of ASA-CSSA-SSSA and the American Forage and Grassland Council (pp. 114). State College, Pa.: ASA-CSSA-SSSA.

Butler, T. J., Muir, J. P., & Provin, T. L. (2007). Phosphorus fertilization of annual ryegrass and comparison of soil phosphorus extractants. Journal of Plant Nutrition, 30 (1), 9-20 doi: 10.1080/01904160601054825.

Butler, T. J. & Muir, J. P. (2006). Dairy manure compost improves the soil and increases tall wheatgrass yield. Agronomy Journal, 98 (4), 1090-1096 doi:10.2134/agronj2005.0348.

Butler, T. J., Ocumpaugh, W. R., Sanderson, M. A., Reed, R. L. & Muir, J. P. (2006). Evaluation of rhizoma peanut genotypes for adaptation in Texas. Agronomy Journal, 98 (6), 1589-1593 doi:10.2134/agronj2006.0141.

Butler, T. J., Muir, J., & Ducar, J. T. (2006). Response of Coastal bermudagrass (Cynodon dactylon) to various herbicides and weed control during establishment. Weed Technology, 20 (4), 934-941.

Butler, T. J., Muir, J. P. & Ducar, J. T. (2006). Weed control and response of various herbicides during Tifton 85 bermudagrass establishment from rhizomes. Agronomy Journal, 98 (3), 788-794 doi:10.2134/agronj2005.0282.

Muir, J. P., Ocumpaugh, W. R., & Butler, T. J. (2006). Winter harvests for annual forage medics in the southern great plains. Forage and Grazinglands, Plant Management Network (5), doi:10.1094/FG-2006-0531-01-RS.

Butler, T. J., Redmon, L. A., Stritzke, J., & Goad, C. L. (2006). Using prescribed fire, tillage, and fertilizer to manage broomsedge-infested pastures. Forage and Grazinglands, Plant Management Network, doi:10.1186/1471-2229-1189-1110.

Butler, T. J., & Muir, J. (2006). Coastal bermudagrass (Cynodon dactylon) yield response to various herbicides. Weed Technology, 20 (1), 95-100.

Zylman, J., Weindorf, D. C., Wittie, R., McFarland, A., & Butler, T. J. (2005). Field-truthing of USDA-NRCS soil survey geographic data on Hunewell Ranch, Erath County, Texas. Soil Survey Horizons, 46 (4), 135-145.

Muir, J., Ocumpaugh, W. R., & Butler, T. J. (2005). Trade-offs in forage and seed parameters of annual Medicago and Trifolium species in North Central Texas as affected by harvest intensity. Agronomy Journal, 97 (May-June), 118-124.

Nguluve, D., Muir, J. P., Wittiee, R., Rossiere, R. & Butler, T. J. (2004). Yield and nutritive value of summer legumes as influenced by dairy manure compost and competition with crabgrass. Agronomy Journal, 96 (3), 812-817 doi:10.2134/agronj2004.0812.