Discusses problems in selecting the correct herbicide for use in controlling aquatic weeds, considering specificity, size of the market, fear of trace contaminants, and herbicide resistance in weeds. Also summarizes some successful herbicides, providing a table listing mode of action of some herbicides used for control of aquatic plants. (JN)

Uses members of the Cruciferae family such as radishes (Sp. Raphanus), to describe a process termed allelopathy by which a plant uses a chemical compound that escapes into the environment to harm another plant. Tips are provided for easy use in the classroom. (ZWH)

A horticultural core curriculum and draft copies of three horticultural cluster curricula are provided. Materials related to the curriculum development project appear first. The core curriculum is designed to provide broad initial instruction in horticulture for students in the first year of a secondary-level vocational horticulture program. The…

This curriculum guide is intended to provide vocational agriculture instructors with an up-to-date resource dealing with grape production in Washington. Addressed in the individual units of the guide are the following topics: the history of grape production; grape types important to Washington; site selection for a vineyard; establishment and…

This publication is designed to provide a core of instruction for the many different fields in agricultural/horticultural education. This course contains 21 instructional units that cover the following topics: introduction to horticulture; beginning a career in horticulture; hand and power tools; introduction to safety; growing facilities;…

This manual, prepared for use by Peace Corps volunteers, provides background information and practical knowledge about crop production. The manual is designed to convey insights into basic crop production, principles, and practices. Primary emphasis is given to providing explanations and illustrations of soil, plant, and water relationships as…

This manual presents a simple, step-by-step description of irrigated rice production in Sierra Leone. It is geared specifically to the role and needs of Peace Corps volunteers who, since the mid-1970s, have worked as agricultural extension agents in the Sierra Leone Ministry of Agriculture and Forestry. The manual is designed to serve both as a…

This manual, developed for use by Peace Corps volunteers, attempts to help development counselors to understand the needs of remote-area groups and to provide for those needs through effective self-help projects. The projects covered are those that can solve most effectively, on the village level, the most pressing problems. The manual is written…