The Effect of Gibberellic Acid and Cowdung Manure on Yield of Vegetable Amaranth in Kano State Sudan Savannah Ecological Zone of Nigeria

The study was conducted during rainy season of 2025 at two different locations, Dawakin kudu local government area,11.837°N latitude 8.597°E longitude and Aliko Dangote University of Science and Technology, Wudil orchard farm, 11.4839°N and 8.5117°E. Both locations are in the Sudan Savannah Ecological Zone of Nigeria. The aim was to determine the response of vegetable Amaranth to cow dung manure and Gibberellic acid. The treatments consisted of four cow dung levels (0, 2, 5 and 10 tons/ha) and three levels of Gibberellic acid (50, 100 and 150 ppm) which were factorially combined and laid out in a randomized complete block design (RCDB) and replicated three times. The parameters consisted of plant height, number of leaves, leaves area, number of branches, stem garth, fresh and dry weight, marketable and non-marketable yield. Application of 10 tons/ha cow dung and 150 ppm Gibberellic acid resulted in greatest crop growth rate and most of yield parameters. Application of 50 tons/ha cow dung and 50 ppm Gibberellic acid resulted in least performance in plant growth parameters and most of yield parameter. But 0 tons/ha cow dung and 50 ppm Gibberellic acid resulted in least on marketable yield.