The Effect of Spraying Calcium Nano Fertilizer and Humic Acid on the Growth and Yield of Cauliflower Crop in Calcareous Soils

This research aims to demonstrate the effect of using nano-fertilizer (calcium oxide) on the growth of cauliflower at concentrations (0, 100, 200) ppm and humic acid in concentrations (0, 2, 4) ml .l-1 and its effect in growth and yield of cauliflower crop (plant height, disc weight, and total yield) also (diameter of disc, leaf area, fresh leaf weight) and study this effects in calcareous conditions in calcareous soil. The results showed the superiority of the treatment (H2+Ca200) in terms of its impact togather on the studied treatments, as it achieved the best results, which reached 47.18 cm, 0.97 kg, 40.95 T.ha-1, 24.60 cm, 284.33cm2, 0.99 kg respectively, There were significant differences between the studied treatments, and the experiment showed the possibility of using a combination of foliar fertilization of both organic humic acid and nano-calcium fertilizer in achieving the best growth and production rates for cauliflower plant yield.