A. C. Burke & Company

A.C. Burke & Company : A.C. Burke & Company Catalog : Agriculture : Soils




	How Chemicals Move Through Soil(Item #2199) This program from the U.S.D.A. Soil Service examines how chemicals move through different types of soil, especially when carried by water. Computer models and graphics demonstrate the concepts of chemical transport, interaction, and transformation in various soil conditions. Recommend-ed for classroom use or for professionals concerned with water quality issues. VHS, 27 minutes. VIDEO Price: $49.95 (Excluding: California Sales Tax)


	How Water Moves Through Soil(Item #2198) Basic concepts of soil and water science are explained in this instructional program from the U.S.D.A. Soil Service. Unique time-lapse photography helps to present the concepts of soil textures and types, capillary and gravitational movement of water, soil water holding capacity, multidirectional flow, and more. Highly recommended for classroom use or training situations. VHS, 30 minutes. VIDEO Price: $49.95 (Excluding: California Sales Tax)