Search Results
You are looking at 1 - 3 of 3 items for
- Author or Editor: James C. Hoffman x
Abstract
The harvesting of snap beans by machine caused obvious as well as unnoticed injury to the pods. All pods were injured, but injury varied in severity. Machine-harvested pods lost a significantly greater amount of weight than did corresponding samples of hand-picked pods. Cultivars differed in response to injury as well as ease with which they abscissed from the plant. The cv. Provider was easy to harvest by machine and received less injury than other cultivars studied. Snap bean cultivars with greater hair concentration per unit area lost weight more rapidly, and to a greater extent than those with sparse hairs. A small but significant amount of weight was lost through the pedicel and possibly the calyx. Pods with broken pedicel ends were similar in weight lost to pods having the pedicel removed. Broken shanks near the pedicel healed rapidly and did not contribute to a large amount of weight loss. Rubbing snap bean pods lightly caused a very significant amount of injury. The hairs on the pods were broken, split or pulled from the base, and these injured areas were the site of significant weight loss. Broken or split hairs did not heal, but continued to be a source of water loss.
Abstract
The Southern Cooperative Snap Bean Trials have been conducted annually since 1946. During the first 22 years, an average of 26 cooperators tested 285 new entries. Each entry remained in the trials an average of 2.3 years. Thirty-nine of the breeding lines tested were released as new cultivars, several of which have a wide range of adaptability in the United States and elsewhere. The average annual yield increased from an initial low of 203 bu/acre for the period 1947-51 to 247 bu/acre for the period 1964-68; and increase of 17.8%. This increase in yield corresponds with the increase obtained in commercial production during the same period.
Abstract
Natural cross pollination was studied with virescent (v), yellow-green (yg), glabrous (g) and halo (h) muskmelon mutants. The average percent crossing was 8.9,7.6,5.1, and 6.0, respectively. The variation was from 0.0 to less than 20%, except for one fruit with 30%.