Effectiveness of Farm Manure and Humic Acid Application on Rice Growth and Yield ( Oryza sativa L.)

Intensive use of inorganic fertilizers can have a negative impact on soil conditions, resulting in decreased agricultural land productivity. The purpose of this research was to determine the effectiveness of providing manure and humic acid as a reduction in the use of inorganic fertilizers in Ciherang Rice cultivation. The research was conducted at the Green House of the Faculty of Agriculture, Muhammadiyah University of Yogyakarta with an experimental method in polybag media and arranged in a Completely Randomized Design (CRD) Single Factor. The treatments tested were control (without manure and humic acid), 10 tons/ha manure + 1 g/l humic acid, 10 tons/ha manure + 3 g/l humic acid, 20 tons/ha manure + 1 g/l humic acid, 20 tons/ha manure + 3 g/l humic acid, 30 tons/ha manure, 30 tons/ha manure + 1 g/l humic acid, 30 tons/ha manure + 3 g/l humic acid, humic acid 3 g/l. The research data were analyzed using analysis of variance with α = 5%. If there was a significant difference, it was continued with Duncan's Multiple Range Test at α = 5%. The results showed that the manure and humic acid application had an effect on increasing the growth of Ciherang variety rice plants. The 30 tons/ha of manure + 3 g/l of humic acid application effectively increased the number of rice tillers in week 5, shoots fresh weight, roots fresh weight, shoots dry weight and roots dry weight in week 8. In the future, the 30 tons/ha of manure + 3 g/l of humic acid application can be applied to increase the rice plants growth. © 2025 Published under licence by IOP Publishing Ltd.