In a study published in Scientific Reports, Taiwo Michael Agbede investigated the use of Tithonia diversifolia biocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More to enhance soil properties and broccoli growth. The research explored how different application rates of this biochar affect soil physicochemical properties, leaf nutrient concentrations, and the overall growth of broccoli plants. The experiment was conducted in a screen house using soil from the Iwo soil series in Nigeria.  

The study revealed that biochar amendments significantly improved soil physicochemical properties compared to the control group. The application of biochar also led to significant increases in broccoli height, number of leaves, leaf area, stem girth, leaf nutrient concentrations, and fresh weight of broccoli biomassBiomass is a complex biological organic or non-organic solid product derived from living or recently living organism and available naturally. Various types of wastes such as animal manure, waste paper, sludge and many industrial wastes are also treated as biomass because like natural biomass these More. Specifically, applying tithonia biochar at rates of 10, 20, 30, and 40 tons per hectare increased the fresh weight of broccoli biomass by 13%, 38%, 26%, and 23%, respectively, compared to the control. The application rate of 20 tons per hectare was found to be the most beneficial, enhancing leaf nutrient concentrations and growth parameters.  

The study highlights the potential of Tithonia diversifolia biochar as a soil amendmentA soil amendment is any material added to the soil to enhance its physical or chemical properties, improving its suitability for plant growth. Biochar is considered a soil amendment as it can improve soil structure, water retention, nutrient availability, and microbial activity.   More to improve soil quality and enhance broccoli productivity. The biochar, derived from organic waste material, offers a sustainable approach to soil management, particularly in regions with degraded soils. The research demonstrates that biochar can serve as an effective tool for improving soil health and agricultural output.  The application of tithonia biochar significantly improved the physical and chemical properties of the soil, including bulk density, porosityPorosity of biochar is a key factor in its effectiveness as a soil amendment and its ability to retain water and nutrients. Biochar’s porosity is influenced by feedstock type and pyrolysis temperature, and it plays a crucial role in microbial activity and overall soil health. Biochar More, moisture content, pHpH is a measure of how acidic or alkaline a substance is. A pH of 7 is neutral, while lower pH values indicate acidity and higher values indicate alkalinity. Biochars are normally alkaline and can influence soil pH, often increasing it, which can be beneficial More, organic carbon (OC), total nitrogen (TN), phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mg).”  

SOURCE: Agbede, T. M. (2025). Influence of Tithonia diversifolia biochar on selected soil physicochemical properties, leaf nutrient concentrations and broccoli growth. Scientific Reports, 15, 8084.