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  • Author or Editor: Albert Purcell x
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Abstract

‘Redblush’ grapefruit borne on young fruiting trees and grafted on sour orange seedlings were exposed to natural and artificial climates. Fruit exposed to artificially controlled and naturally occurring minimum night temperatures above 70°F, combined with high day temperatures, had high Brix contents, low acid, and thin but green peels. Fruit exposed to minimum night temperatures below 60°, combined with moderate to cool day temperatures had both high Brix and acid and thicker but better colored peels. Cool temperatures in the late fall after hot summer and early fall conditions aided in thickening and coloring of peels of fruit which had already attained high Brix and early maturity.

Open Access

Abstract

Protein and dry matter contents were determined for 16 cultivars of sweet potatoes (Ipomoea batatas (L.) Lam.) planted May 28 and harvested on 4 different dates. Means of protein contents of cultivars differed significantly and ranged from 4.17% to 6.51%, dry basis. Protein content decreased at the rate of 0.0067% per day and dry matter decreased at the rate of 23% per day.

Open Access

Abstract

Protein content of sweetpotatoes from a North Carolina root collection was determined. Protein content ranged from 1.73% dry basis to 9.14%. The amino acid composition of protein extracted from 6 selected cultivars was determined. Tryptophan and total sulfur amino acids were limiting by comparison with the FAO reference protein. Other essential amino acids were in excess suggesting that sweetpotato protein may be useful in supplementing other plant proteins.

Open Access