Fertilizers:Vol. I Essential Plant Nutrients Part one of FERTILIZERS: Soil-Plant-Nutrient Relationships(21 minutes) explains soil-plant-nutrient relationships as well as the role of soil in plant growth. This section also explains how the physical and chemical properties of a soil can influence nutrient availability. The essential plant nutrients are introduced along with tips to help students remember them. 21 min.    Fertilizers: Vol. II-Nutrient Availability And Deficiencies In part two (22 minutes) students will delve into and nutrient availability, nutrient deficiencies and the diagnosis of plant problems. The various factors effecting nutrient availability and nutrient absorption are presented. Students will see nutrient- deficiency symptoms and learn how to distinguish between nutrient deficiencies and other plant problems.    Fertilizers: Vol. III-Soil Testing And Fertilizer Terminology The third tape in this series (23 minutes) demonstrates how to test soil fertility. Students will see how to properly collect soil samples for laboratory analysis. The results from the soil analysis explained in detail, along with the recommendations given by the soil laboratory. This program also defines the terms used in the fertilizer industry and explains the information found on fertilizer labels. Students will see a commercial fertilizer distributor as well as a variety of different fertilizer forms and application methods. Both organic and inorganic fertilizers are presented.   Fertilizers: Vol. IV-Fertilizer Programs And Fertilizer Calculations Part Four, the final tape in this series (22 minutes), shows how to develop a cost-effective fertilization program. The program goes step-by-step through various fertilizer calculations for agriculture, horticulture and landscape applications. Examples of price comparisons are calculated, as well as fertilizer application rates for turf and for organic materials. Fertilizer injectors are demonstrated as students learn how to set up and solve equations needed for designing a constant-feed program. This section enhances students problem-solving skills and critical thinking abilities.