Fig. 4. Critical periods of weed interference and the importance values of sunflower and wild plants. Seeds of the “Jaeraejongja” cultivar were sown in 1 m × 1 m experimental plots at 0, 50, 100, and 150 seeds each. Colored symbols indicate the importance value (red, sunflower; blue, sum of wild plants), and the orange box indicates the critical period for weed interference.
© J Ecol Environ
