Bibliographies in the Quick Bibliography Series of the National Agricultural Library (NAL), are intended primarily for current awareness, and as the title of the series implies, are not indepth exhaustive bibliographies on any given subject. However, the citations are a substantial resource for recent investigations on a given topic. They also serve the purpose of bringing the literature of agriculture to the interested user who, in many cases, could not access it by any other means. The bibliographies are derived from computerized on-line searches of NAL's AGRICOLA data base. Timeliness of topic and evidence of extensive interest are the selection criteria.