SOILS / 279


requirements will be required to make up any deficiency early in their graduate
work. The student will be held responsible for such basic undergraduate courses
as are deemed necessary for the pursuit of his special program.

COURSES FOR ADVANCED UNDERGRADUATES AND GRADUATES
SLS 525-TROPICAL SOILS. 3 credits
SLS 537-SOILS OF FLORIDA. 3 credits
 GRADUATE COURSES
SLS 600-ToPics IN SOILS. 4 credits
 Prerequisite: SLS 330. Variable content; offered by arrangement to qualified
students at continuing education centers. May be repeated with change of content
up to a maximum of 8 credits.
SLS 621-SOIL CHEMISTRY. 5 credits
 Prerequisites: SLS 421, CY 331, CY 341. Clay minerals and their ionic environ-
ment. Factors affecting availability and losses of plant nutrient elements.
SLS 622-SOIL MICROBIOLOGY. 5 credits
 Prerequisite: SLS 422. Microorganisms of mineral and organic soils; their eco-
logical relationships and metabolic processes.
SLS 623-SOIL GENESIS AND CLASSIFICATION. 4 credits
 Prerequisite: SLS 423. Developmental factors, morphological characteristics,
 systems of classification, and distribution of soils of the world.
 SLS 624--SOIL PHYSICS. 4 credits
 Prerequisites: SLS 424, PS 215, PS 216, PS 217, MS 304. Basic physical con-
 cepts of the movement and retention of water, chemical solutes, heat, and air,
 with major emphasis upon water.
 SLS 626-SOIL FERTILITY. 4 credits
 Prerequisite: SLS 421. Plant response to variations in soil environment.
 SLS 627-LABORATORY METHODS OF SOIL CHEMICAL ANALYSES. 4 credits
 Prerequisites: SLS 421, CY 331. Instrumental and analytical procedures.
 SLS 628---SOIL ORGANIC MATTER AND ORGANIC SOILS. 3 credits
 Prerequisites: CY 362, CY 363, SLS 621, SLS 622, SLS 626; or consent of
 instructor. The chemistry of soil organic matter; techniques of identification; for-
 mation and management of organic soils.
 SLS 630-FOREST SOILS. 4 credits
 Identical with FY 630. Prerequisites: SLS 421, SLS 423, FY 403. A study of
 soils as a component of forest ecosystems. Soil chemical, physical, and biological
 properties influencing tree growth and biogeochemical cycles.
 SLS 631-COLLOIDAL AND PHYSICAL CHEMISTRY OF SOILS. 5 credits
 Prerequisites: CY 342, SLS 621; or consent of instructor. A theoretical treat-
 ment of ion exchange and activities of ions in solution and in suspension; energy
 relationships in soil colloids; aluminum chemistry; water properties; application of
 thermodynamics to the physico-chemical aspects of soil colloids.
 SLS 634-ADVANCED SOIL PHYSICS. 5 credits
 Prerequisites: MS 305, CY 342, SLS 624. Analysis of mathematical solutions
 to selected boundary value problems encountered during transport and storage
 of water, solutes, heat, and air in soils.
 SLS 636-MICRONUTRIENTS IN SOILS. 3 credits
 Prerequisites: SLS 421, BTY 310; or consent of instructor. The chemistry of