W. G. Klussmann

This study completes a segment of a project to evaluate the use of anhydrous ammonia as a fisheries management technique in small impoundments. Objectives were to determine the feasibility of using anhydrous ammonia for fish eradication, for pond fertilization, and for vegetation control. Treatments in 15 pounds in Central Texas indicate that anhydrous ammonia fulfills these objectives. Anhydrous ammonia was selected because of known toxicity to fishes and because ammonia is a naturally occurring compound. Thus, the use of anhydrous ammonia as a total or selective population control agent...

The purposes of this study were (1) to determine the feasibility of using isolated columns of water as an efficient way to obtain a natural series of similar bodies of water that are subject to identical climatic and environmental conditions, and (2) to determine the effect of fertilization and the fertilization rate that will give optimum and/or maximum phytoplankton production. Twelve open-ended transparent polyethylene tubes 4' in diameter and 9' in length, were used to isolate vertical "transects" of water in the study pond. Measurements of oxygen, pH, water temperature, and...