College of Tropical Agriculture and Human Resources
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Hawaii Water Quality Extension Program
nps 319 | oahu watersheds | waialua | project 93-105B-95
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Natural Resources Extension

Project Name: Reducing Nonpoint Source Pollution from Sugarcane Fields by Cereal Cover Cropping in Kaiaka – Waialua HUA
ASO Log No.: 93-105B-95
Start/End Date: December 1992 to June 1995
Federal Funds: $46,174.00
Matching Funds: $30,874.00
Contractor: Samir El-Swaify
University of Hawaii – CTAHR
Department of Agronomy and Soil Sciences
1910 East-West Road, Sherman Lab
Honolulu, HI 96822
Phone: (808) 956-7530
Fax: (808) 956-6539
Pollution from runoff, sediment, and associated organic or inorganic chemicals is the primary cause of surface water quality impairment in Hawaii. Kaiaka-Waialua Bay is designated as one of Hawaii’s Water Quality Limited Segments. Agriculture is acknowledged as a major contributor to NPS pollution of the bay and, at the time of this project, growing sugarcane was the most widely practiced land use in the area.
Objectives/Goals: To demonstrate cover cropping technology at a realistic and operational scale in Hawaii’s highly developed agriculture, emphasizing the development of a mechanized tool to facilitate the adaptation and adoption of intercropping technologies by sugarcane plantations
Methods Employed: • Develop specialized precision equipment for planning cover crops
• Demonstrate the use of this equipment
• Demonstrate the effectiveness of oat, rye-grass, rye-grain, or other cereal cover crops in reducing herbicide applications while maintaining adequate weed control
• Quantify the benefits
• Hold demonstrations, field days, and training to educate local farmers
• Make the planter available for loan to interested land users
Pollutants of Concern: Sediment, herbicides
Watershed: Waialua, Kiikii, Poamoho, Kaukonahua, Paukaulia, Opaeula, Helemano, Anahulu, Kawailoa, Kawaiiki, Loko Ea and Keamanea Watersheds, island of Oahu
Size of Project: Not defined in report
Affected Water Bodies: Kaiaka and Waialua Bays
Deliverables: Not described in report
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Cooperative Extension Service programs, conducted in cooperation with the U. S. Department of Agriculture, are provided to the people of Hawaii without regard to race, sex, age, religion, color, national origin, ancestry, disability, marital status, arrest and court record, sexual orientation, or veteran status. The University is an equal opportunity / affirmative action institution.