Abstract
The effects of planting date and plant density on total and marketable yield were examined for the edible dry beans `Aurora' and `Fleetwood', erect type I geneotype cultivars, over three years. For `Fleetwood' alone, fertilizer levels and application of a spray-on-soil polymer mulching material were examined for effects on yield. The mulching material was degraded by rain prior to canopy closure but patches were present at harvest. Using continous recording thermometers, temperatures over two week periods following sowing of `Fleetwood', from 23 cm below the surface of mulched and bare soil were converted to soil degree days (SDD). `Fleetwood' generally had higher yields than `Aurora'. Earlier planting improved yields. In one of three years increasing plant density increased yields. Increased fertilization did not affect yield. Application of mulch did not affect yield. However, spray-on-mulch did increase SDD after the earliest planting date. Cultural systems for existing production, or potential production areas, must be developed for the conditions of each location.
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