• CSES 1203 - Introduction to Plant Science (Fa, Sp)
  An introduction to basics of agricultural crop plant structure, growth, and production. (Same as HORT 1203).
• CSES 2103 - Crop Science (Sp)
  Principles of crop growth, development, and utilization and how these principles relate to production. Emphasis on major agronomic crop species. Lecture 3 hours per week. Prerequisite: CSES 1203 or HORT 1203.
• CSES 2101L - Crop Science Laboratory (Sp)
  A series of labortory experiments designed to reinforce principles of plant growth and development, reproduction, classification, and the utilization of plant products. Emphasis is placed on major crop plant species. Experiments are conducted by individuals or by teams. Laboratory consists of a single, 2 hour period each week. Required for agronomy majors. Corequisite: (CSES 2103)
• CSES 4013 - Advanced Crp Science (Sp)
  Fundamental concepts of crop physiology, crop improvement, seed science, and crop production systems. Recitation 3 hours per week. Prerequisite: CSES 2103
  

• Dr. David Longer conducts research in the area of sustainable agriculture on crops commonly grown in the Mississippi Delta region of Arkansas.
• Current research emphasis is on characterization of  wheat residue in wheat/soybean double crop systems.
• The goal of this research is that by reducing after-harvest wheat residue, burning may not be necessary to facilitate a successful stand of soybeans.
• Additional research focuses on nitrogen utilization in companion cropped corn.
• Various legumes, grown as companion crops for corn are being evaluated for their ability to contribute some nitrogen to the corn, thus reducing the needed for continued use of high N inputs.
  

Dr. Longer has engaged in a broad range of research topics during the time of his employment at the University of Arkansas.

• His first research assignment was supervision of the Statewide Variety Testing Program in soybeans, cotton and small grains. From this, his program evolved into identification of factors associated with seed vigor and quality in soybean, small grains and cotton.
• He was successful in research projects dealing with new crop introductions and soybean and sorghum inter-cropping for hay and silage production. Starting in 1998, he began an applied program of field and lab research in turfgrass management.
• He is currently well underway in a new research initiative in sustainable agriculture with emphasis on post-harvest control of wheat and rice straw to reduce burning and improve soil organic matter and to assess the effect on subsequent yield of soybean.

• Dr. Longer’s teaching efforts have lead to the development of six courses within the Department of Crop, Soil and Environmental Science, as well as active involvement in numerous teaching, advising and recruiting related activities within both the Department and the Dale Bumpers College of Agricultural Food and Life Science.
• He has been meritoriously cited for advising and teaching excellence and takes great pride in student development  and mentoring undergraduates in special research problems, several of which have been published.

• Longer, D.E. 2002. Crop Science: A Text and Study Guide for Agronomy. Erudition Press, North Chelmsford, MA.

• Nayigihugo, V., D.W. Kellogg, D.E. Longer, Z.B. Johnson, K.A. Anschutz, and T.E. Devine. 2002. Case Study: Performance and Ensiling Characteristics of Tall-Growing Soybean Lines Used for Silage. Prof. An. Scientist. 18:85-89.

• Cordell, M., J. Davis, and D.E. Longer. 2001. Improvements in Turfgrass Color and Density Resulting from Comprehensive Soil Diagnostics. Discovery J. Vol. 2, p. 8-12

• Longer, D.E. 1999. Overseeding Warm Season Lawns with Cool Season Turfgrass Species. Hort. Studies Jour. pp 73-76.

• Longer, D.E. 1998. Cotton Regrowth and Recovery from Early Season Leaf Loss. Env. and Exp. Bot. 41:67-73.

• Brye, K.R., D.E. Longer, and E.E. Gbur. 2006. Impact of tillage and reside burning on CO2 flux in a wheat-soybean production system. Soil Sci. Soc. Am. J.   70:1145-1154.

• Cordell, M.L., K.R. Brye, D.E. Longer, and E.E. Gbur. 2006. Residue management practice effects on soybean establishment anf growth in a young wheat-soybean double-cropping system. J. Sustain. Agric. 29:97-120.

• Brye, K.R., M.L. Cordell, D.E. Longer, and E.E. Gbur. 2006. Residue management practice effects on soil surface properties in a young wheat-soybean double-crop system. J. Sustain. Agric. 29:121-150.

• Brye, K.R., D.E. Longer, M.L. Cordell, P. Chen, E.E. Gbur, and A.L. Pirani. 2007. Impact of nitrogen applications to wheat on no-tillage double-crop soybean. Online. Crop Man. doi:10.1094/CM-2007-0219-01-RS.

• Brye, K.R., D.E. Longer, M.L. Cordell, E.E. Gbur, and A.L. Pirani. 2007. Wheat response to nitrogen under low phosphorous and potassium fertility in a wheat-soybean production system. Comm. Soil Sci. Plant Anal. 38: 389-402.

• Meek, C.R., D.E. Longer, and L. Purcell. 2003. Roundup Ready Seed Arbitration in Arkansas: A Case Study. NACTA J. Vol. 47 (2): 42-46.
• Savin, Mary C.,David Longer and David Miller. 2006. Matrices to Revise Crop, Soil and Environmental Sciences Undergraduate Curricula. J. Nat. Resour. And Life Sci. Educ. 34:77-82.