Effect of gibberellic acid and potassium nitrate seed treatments on the emergence and seedling vigor of Amaranth and <i>Cleome gynandra</i>

Seed dormancy is the major challenge in cultivation of Amaranth and Cleome gynandra. C. gynandra are affected by chemical, physical, physiological dormancy. The current study was conducted at Marondera University Agricultural Sciences Technology (MUAST) farm 2021 2022. effects gibberellic acid potassium nitrate seed treatments on emergence seedling vigour were evaluated. Seeds pre-soaked (control 0, 100, 200, 300,400, 500 ppm) 0%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%) solutions for 24 h to have a factorial layout within randomized complete block design replicated three times. treated with showed significant difference while no difference. highest percentage vigor index recorded seeds ppm acid. maximum percentages (62.1%) (60.7%) obtained 2022 2021. least (46.4%) (45.3%) control (603) 2022, (562) lowest indices 341 270, which results that has potential reduce