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Response of Asparagus to Applications of Simulated Vegetable-Processing Waste Water¹

ABSTRACT

Asparagus (Asparagus officinalis L.) might serve as a cash crop in fields to be used for food processing waste water treatment.

An experiment was conducted to determine the suitability of asparagus in such a situation. Well water and simulated waste waters representative of pea (Pisum sativum L.), green bean (Phaseolus vulgaris L.), corn (Zea mays L.), lima bean (Phaseolus lunatus L.), and steam-peeled sweet potato (Ipomoea batatas Lam.) processing waste waters were applied at rates of 6.4, 12.7, and 19.0 mm/day, 5 days per week. The chemical oxygen demand (COD) values of the simulated waste waters ranged from 534 to 7,144 mg/liter.

Asparagus yield was adversely affected by the highest COD waste water applied at the highest rate only.

Key Words: spray irrigation • hydraulic load • COD • organic load

¹ Contribution from the Soil, Water, and Air Sciences, Northeast Region ARS, USDA, in cooperation with the Virginia Truck and Ornamentals Research Station, Norfolk, VA 23501.

² Plant Physiologist. Present address: USDA-ARS. RD 2, Box 600, Georgetown, DE 19947.

Received for publication November 12, 1974.