Spatial distribution of broadleaf weeds seedbank in sugar beet field

A field experiment was conducted to investigation of the spatial distribution of broadleaf aAgricultural Research Station in Karaj region. The Sampling from seed banks was performed before sugar beet planting and also weeds density were done by using rectangular (100 * 25cm) quadrate in three different dates during the growing season. All data were transferred to the RW99 software for draw maps of weed distribution. The results showed that the highest amount of weed population was belonging to pigweed (Amaranthus retroflexus) and lambsquarter (Chenopodium album). There were significant differences between different parts of the field in terms of seed bank density. Weed seed and seedling distribution will change of area with very high density to weed free area. The results showed that did not change the mention patches at first sampling time. Seedbank patchy pattern was in accordance with seedling germination pattern. So the seedbank maps can be used as information database of seedling germination. The results of this study showed that spatial distribution monitoring allows prediction of weed behavior and thus can be a valuable tool for. management decisions and increases our understanding of the dynamics of weed populations