Evaluation of the Effectiveness of Various Ameliorant Sources in Increasing NP Absorption and Sweet Corn Productivity on Sandy Soil

Aims: This study aimed to determine the effectiveness of various ameliorant sources in enhancing NP uptake and the productivity of sweet corn (Zea mays L. saccharata) in sandy soil. Study Design: The study used a randomized block design with five treatments and four replications. Place and Duration of Study: The field experiment was conducted in a sandy soil area in Moncok Karya, Pejeruk Karya Village, Ampenan District, Mataram City. The analysis part was carried out in Microbiology laboratory, and in the Soil Physics and Chemistry Laboratory, Faculty of Agriculture, University of Mataram. All series of trials were completed in six months. Methodology: The experimental tested five treatments, namely; Control, no ameliorant (A0), Rice Husk Charcoal (AA), Cow Manure (AS), Compost (AK), and Fertile Organic Fertilizer (AP). Each treatment was replicated 4 times. Observations were made on biomass weight, crop yield, nutrient concentrations (N and P), nutrient uptake, and mycorrhizal activity. Results: Ameliorant treatment with cow manure significantly improved plant growth and productivity by enhancing nutrient availability in the soil. This included increases in biomass, and yield. Cow manure also promoted mycorrhizal activity, improved soil structure and increased nutrient absorption efficiency. Conclusion: The research result showed that the cow manure as an ameliorant markedly enhanced NP uptake and productivity of sweet corn in sandy soil. It improved soil fertility, supported mycorrhizal colonization, and strengthened plant resistance to environmental stresses.