Effects of Planting Date and Cultivar on Yield and Yield Components of Soybean for Forage as a Summer Cropping in Tabriz

To evaluate the effects of planting date and cultivar on qualitative and quantitative yield of soybean for forage as a summer cropping, an experiment was carried out in factorial, based on randomized complete block design with three replications. The planting dates (22 Jun, 1Jul and 11Jul) and cultivar (Williams, Telar and TNS). Were constituted the experimental factors. Seeds were planted in experimental field of university of Tabriz on 2004. The results showed significant difference among planting date and cultivar for dry matter (DM) and percent of stem DM, pod DM and leaf DM. The results showed that the highest amounts of dry matter yield were obtained from 22 Jun and cultivar Williams. Maximum percent of pod DM belonged to Williams and planting date 22 Jun. Maximum percent of leaf DM was obtained from planting date 11 Jul, by cultivar TNS. However minimum percent of stem DM was obtained from 11 Jul (the same with 1 Jul) and cultivar Williams (the same with Telar). The planting date * cultivar interaction was nonsignificant for all the traits.