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University of Arizona (1984)

EVALUATION OF ONION (ALLIUM CEPA L.) YIELD USING RESPONSE SURFACE DESIGN, GROWN UNDER MULTIPLE CONTROLLED CULTURAL FACTORS

Bailey, William R.

Titre : EVALUATION OF ONION (ALLIUM CEPA L.) YIELD USING RESPONSE SURFACE DESIGN, GROWN UNDER MULTIPLE CONTROLLED CULTURAL FACTORS

Auteur : Bailey, William R.

Université de soutenance : University of Arizona

Grade : Master of Science (MS) 1984

Résumé
The effects of water frequency, spacing, fertilizer, pesticide, herbicide, and harvest date on the response of onion (Aliium cepa L.) cultivar ’Granex 429’ in the 1983-84 season under field conditions at the University of Arizona Experiment Station at Tucson. Water levels showed quadratic effects at intervals ranging from 2 to 12 days on total yield. Large-bulb yield showed a positive linear response. Spacing showed linear effects on yield at spacings ranging from 0.5 to 4.5 inches. Total yield was negatively and large-bulb yield was positively correlated. Fertilizer showed positive linear response on total yield and large-bulb yield. Levels ranged from 0 to 594 lb N/A. Harvest date showed positive linear response on total and large-bulb yield with dates ranging from May 27 to June 16. Pesticide and herbicide were insignificant at any leve1. The design used in the experiment was response surface.

Mots clés : Onions — Growth. ; Plants — Effect of chemicals on.

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Page publiée le 26 avril 2016, mise à jour le 16 février 2018