Organic Inputs for Climate-Smart Agriculture: Effects of Sunflower (Tithonia diversifolia) Leaf Residues and Extracts on Tomato (Lycopersicum esculentum Mill.) Yield and Soil Nutrient Dynamics

Organic Inputs for Climate-Smart Agriculture: Effects of Sunflower (Tithonia diversifolia) Leaf Residues and Extracts on Tomato (Lycopersicum esculentum Mill.) Yield and Soil Nutrient Dynamics

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Volume/Issue: Volume 29: Issue 1

Published online: 18 Jun 2026

Pages: 15–30

DOI: https://doi.org/10.2478/ahr-2026-0003

Abstract

Tomato (Solanum lycopersicum L.), a widely cultivated and consumed vegetable crops worldwide, a was an object of a field trial for two seasons [early (rainy) and late (dry)] seasons, 2023–2024) at NIHORT, Ibadan to evaluate sunflower (Tithonia diversifolia) based organic inputs for tomato (Solanum lycopersicum L.) production. Using a 2 × 5 factorial RCBD with three replicates, treatments combined four rates of sun-dried sunflower compost (0, 1, 2, 3 t ha−1) and three foliar spray rates of sunflower leaf compost extract (0; 1,000; 2,000 dm3 ha−1). The dry leaves were incorporated two weeks before transplant, while the compost extracts were applied at four and six weeks after transplant. During the 2023 season, the application of 3 t ha−1 of leaves compost increased early-season fresh fruit weight from 724.5 to 1,045.5 kg ha−1 and late-season weight from 280.0 to 818.0 kg ha−1. The foliar compost extract at 2 000 dm3 ha−1 raised fresh yield from 831.5 to 907.0 kg ha−1 and fruit number per plant from 146.0 to 200.5. while the 2024 season, 3 t ha−1 of leaf compost boosted early-season yield from 64.0 to 333.0 kg ha−1 and fruit count per plot from 28 to 316, while compost extract increased fresh yield from 832.0 to 907.0 kg ha−1. All main effects were significant (p ≤ 0.05); while there was no significance in the interactions. This discovery demonstrated that 3 t ha−1 of dry sunflower leaf compost substantially enhanced the tomato growth and yield, and that 3 000 dm3 ha−1 of leaf compost extract provides additional biostimulant benefits. Hence the incorporation of sunflower compost biomass and fresh extracts offered a low-cost, sustainable alternative to synthetic fertilizers, therefore, advancing climate-smart tomato production in tropical agroecosystems, while further research is needed in other area of climate smart agriculture.

Keywords: Tithonia diversifolia, organic amendment, leaf extract, tomato yield, biostimulant, tropical agriculture

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References

Agbontale, A. O., & Issa, F. O. (2011). Agricultural knowledge information system (AKIS) in Nigeria: practice, challenges and solutions. Journal of Sustainable Development, 8(1/2), 66–74.


Adebayo, S. T., Oyawole, F. P., Sanusi, R. A., & Afolami, C. A. (2022). Technology adoption among cocoa farmers in Nigeria: What drives farmers' decisions? Forests, Trees and Livelihoods, 31(1), 1–12.


Adetimehin, O. D., Okunlola, J. O., & Owolabi, K. E. (2018). Utilisation of agricultural information and knowledge for improved production by rice farmers in Ondo State, Nigeria. Journal of Rural Social Sciences, 33(1), 76–100.


Agyei, R. O., Amankwah, K., Tham-Agyekum, E. K., Narh, E., Quaye, J., & Bakang, J. E. A. (2023). Unveiling the nexus: how extension delivery methods drive the adoption of improved agronomic practices among cocoa farmers in the Bono Region. International Journal on Food, Agriculture and Natural Resources, 4(4), 51–61.


Aikpokpodion, P. O., & Adeogun, S. O. (2011). A diagnostic study of constraints to achieving yield potentials of cocoa (Theobroma cacao L.) varieties and farm productivity in Nigeria. Journal of Agricultural Science, 3(4), 68.


Albertini, B., Schoubben, A., Guarnaccia, D., Pinelli, F., Della Vecchia, M., Ricci, M., Di Renzo, G. C., & Blasi, P. (2015). Effect of fermentation and drying on cocoa polyphenols. Journal of Agricultural and Food Chemistry, 63(45), 9948–9953.


Albornoz, A. (2024). Socio-productive dynamics in agricultural systems. Conceptual theoretical bases for the study. Revista de la Facultad de Agronomia De La Universidad Del Zulia, 41(4).


Amusan, O. A., Amusan, F. O., Braimoh, A., & Oguntunde, P. (2005). Deutscher Tropentag 2005–Hohenheim, October 11–13.


Awodumila, D. J., Orimogunje, O. A., Ogunjobi, T. E., Dada, O. A., Rahman, S. B., Adelusi, A. A., & Mustopha, F. B. (2022). Information Sources to Cocoa Farmers on Indigenous Knowledge (IK) Utilisation in Ogun State, Nigeria. Current Journal of Applied Science and Technology, 41(41), 35–43.


Baah, F., & Anchirinah, V. (2010). Looking for convergence: Stakeholders' perceptions of cocoa extension constraints in Ghana. Journal of Science and Technology, 30(3).


Bahfiarti, T. (2016). Role of ‘‘Key Farmer’’ as Opinion Leaders Through Group Communication in Accepting Farmer's Innovation in South Sulawesi Cocoa Plantation. Jurnal Pekommas, 1(2), 197–206.


Dormon, E. N. A., Leeuwis, C., Fiadjoe, F. Y., Sakyi-Dawson, O., & Van Huis, A. (2007). Creating space for innovation: the case of cocoa production in the Suhum-Kraboa-Coalter District of Ghana. International Journal of Agricultural Sustainability, 5(2–3), 232–246.


Ebewore, S. O., & Emuh, F. N. (2013). Cocoa farmers' access to agricultural information on cultural practices in Edo State, Nigeria. International Journal of Agriculture and Rural Development, 16(1), 1409–1414.


Elhadi, T., & Boland, H. (2016). Agriculture Knowledge and Information System within Rahad Agriculture Scheme-Sudan. In Proceedings of the International Conference Advances in Social Science, Economics and Management Study-SEM 2016, Birmingham, UK, 17 February–18 March 2016. Institute of Research Engineers and Doctors.


Etaware, P. M. (2022). Some identifiable factors responsible for the variation in cocoa production in Nigeria and other cocoa producing nations, adjudicated by their contributions to the global market. Frontiers in Agronomy, 4, 731019.


Gavrilova, N. G. (2021, September). Contemporary global production and consumption of cocoa: An assessment. In IOP Conference Series: Earth and Environmental Science (p. 022095). IOP Publishing.


Ilesanmi, J. O., & Afolabi, J. A. (2020). Determinants of adoption of improved Cocoa technologies in Ekiti State, Nigeria. International Journal of Agricultural Economics, 5(2), 36.


Kania, J., & Żmija, J. (2016). Changes in agricultural Knowledge and information systems: Case study of Poland. Visegrad Journal on Bioeconomy and Sustainable Development, (1).


Kehinde, A. J., Olubunmi, A., Oluseun, A. S., Ayodele, M. S., & Eniola, F. (2017). Enhancing cocoa bean quality through improved cultural practices in major cocoa-producing states of Nigeria. International Journal of Agricultural Management and Development (IJAMAD), 7(3), 357–365.


Kongor, J. E., Owusu, M., & Oduro-Yeboah, C. (2024). Cocoa production in the 2020s: Challenges and solutions. CABI Agriculture and Bioscience, 5(1), 102.


Lawal, J. O., & Oluyole, K. A. (2008). Factors influencing adoption of research results and agricultural technologies among cocoa farming households in Oyo State, Nigeria. International Journal of Sustainable Crop Production, 3(5), 10–12.


Oso, O. A., Lawal-Adebowale, O. A., Aduradola, R. R., & Adigun, J. K. (2020). An investigation of the effects of organisational communication on work outcomes within agriculture research institutes in Nigeria. Agricultura Tropica Et Subtropica, 53(4), 207–213.


Subroto, E., Djali, M., Indiarto, R., Lembong, E., & Baiti, N. (2023). Microbiological activity affects post-harvest quality of cocoa (Theobroma cacao L.) beans. Horticulturae, 9(7), 805.


Suh, N., F. Njimanted, G., & Thalut, N. (2020). Effect of farmers' management practices on safety and quality standards of cocoa production: A structural equation modelling approach. Cogent Food & Agriculture, 6(1), 1844848.


Tsowou, K., & Gayi, S. K. (2019). Trade reforms and integration of cocoa farmers into world markets: Evidence from African and non-African countries. Journal of African Trade, 6(1), 16–29.