Described are nine enzyme essays for distinguishing soil samples. Colorimetric methods are used to compare enzyme levels in soils from different sites. Each soil tested had its own spectrum of activity. Attention is drawn to applications of this technique in forensic science and in studies of soil fertility. (Author/AJ)

Described is a slide set which is designed to illustrate the entire range of soils found in the arid regions of the earth's surface. Information on physical and chemical soil properties, soil classification, and related soil management considerations for agricultural development are included. (CW)

Offers perspectives and an overview of 35 years of teaching an elementary course in soils at Mississippi State University. Discusses the nature of and changes over the years in course content, teaching methods, and student characteristics. Explains the principles that guided instruction in the course. (ML)

The advantages and disadvantages of poster sessions vs. oral talks are reviewed. Front-end and secondary planning, materials, and follow-up needed for poster sessions are outlined. An example session and a check list are included. (Author/CW)

Presented is a successfully implemented active learning project and results of a survey to assess the success of the project. Materials and methods are discussed, and an example of one project is provided. (Author/CW)

Described is a technique for taking a large monolith for the purpose of teaching soil structure. Materials and procedures are detailed. A survey of 93 students indicated that the larger monolith was preferred over the commonly used narrow ones. (CW)

Presented is a comprehensible structural representation of humic substances. A number of important roles of soil organic matter, including contribution to the cation-exchange capacity, binding of pesticides, and formation of complexes with micronutrient cations, are illustrated. (Author/CW)

Compared are the estimates of students and professional field soil scientists. Results indicate that with three weeks of practice and the availability of good reference samples, students can attain a level of proficiency comparable to professional soil scientists. Suggestions for grading evaluations are provided. (Author/CW)

A peer review process similar to that used by scientific journals which can be applied to class work is presented. Stressed is the advantage of using peer review when writing skills are a priority but instructor time is limited. Guidelines and examples of comments are provided. (CW)