Agronomic responses of selected improved sorghum (Sorghum bicolor L. Moench) varieties to organic soil amendment with poultry manure in the humid tropics

Agronomic responses of selected improved sorghum (Sorghum bicolor L. Moench) varieties to organic soil amendment with poultry manure in the humid tropics | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Agronomic responses of selected improved sorghum (Sorghum bicolor L. Moench) varieties to organic soil amendment with poultry manure in the humid tropics Olasupo Fadeyi, Thomas Fabunmi, Victor Olowe, Christopher Adejuyigbe This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6745763/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Sorghum's intrinsic resilience makes it ideal for organic farming, although there is little research on its performance in organic production systems. This study investigated the agronomic performance of three improved sorghum varieties (SAMSORG 44, SAMSORG 47, and SAMSORG 48) in response to poultry manure application (0, 2.5, and 5.0 t ha⁻¹) at the Certified Organic Research Plots of the Institute of Food Security, Environmental Resources and Agricultural Research (IFSERAR), FUNAAB (June – December, 2023) and the Organic Agriculture Professionals in Tertiary Institutions in Nigeria (OAPTIN), FUNAAB (September – November, 2024). The experiments were laid out in randomized complete block design with three replications. Results revealed that manure application had no significant (p < 0.05) effect on days to 50% flowering, 100% flowering, and maturity in both years although there was significant (p < 0.05) varietal effect on them. SAMSORG 44 exhibited the earliest flowering and the shortest time to maturity. Plant height, dry matter accumulation, panicle weight, seed weight per plot, threshing percentage, biomass and seed yields were significantly (p<0.05) increased with manure application. Significant (p < 0.05) interactions between manure and variety indicated shortest time to maturity and highest seed yields of 2748.4 kg/ha and 2599.1 kg/ha, both years respectively at 5.0 t ha−1 manure application particularly for SAMSORG 44 which are significantly higher than the average yield values in Africa (924.8 kg/ha) and the world (2534.2 kg/ha). Hence, application of 5.0 t ha⁻¹ poultry manure on SAMSORG 44 is recommended for potential resource-constrained organic sorghum farmers in the humid tropics. Sorghum bicolor sorghum varieties organic agriculture poultry manure sustainable agriculture Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-6745763","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":464850880,"identity":"3cdcb565-9e70-48e9-b70f-54e2a9887f06","order_by":0,"name":"Olasupo Fadeyi","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA/0lEQVRIiWNgGAWjYBAC9gYGAwYgYuZnPgDig4gE/Fp4DkC1SLYlkKQFCAyOEa2F/fDGxzwFNuzGx3jMHvyoucPAz55jwFzwC48WnrRiYx6DNGazYzzmhj3HnjFI9rwxYJ7Zh1uLPUOOmTSPwWFms/s9ZhI8bIcZDG4AbeHtwWML/xvz3yAtxm08ZpJ//h1msCeoRSLHjBmkxYCNx0yatw1oiwRQC88PfFqeFUvOAfpF4hhbmbRs3zMeiTPPCg7zNuBzWPLGD2/+2CTztzFvk3zz7Y4cf3syMAz/4NYCAkw8DAzJcDNAxAHGNvxaGIEOt0MTI2DLKBgFo2AUjCgAADMWS4R9xlnpAAAAAElFTkSuQmCC","orcid":"","institution":"Federal University of Agriculture, Abeokuta (FUNAAB)","correspondingAuthor":true,"prefix":"","firstName":"Olasupo","middleName":"","lastName":"Fadeyi","suffix":""},{"id":464850881,"identity":"ec3a1a65-372f-4668-b1e9-8a1a112cc820","order_by":1,"name":"Thomas Fabunmi","email":"","orcid":"","institution":"Federal University of Agriculture, Abeokuta (FUNAAB)","correspondingAuthor":false,"prefix":"","firstName":"Thomas","middleName":"","lastName":"Fabunmi","suffix":""},{"id":464850882,"identity":"5824d467-2dba-4be3-b6df-9e33644125c6","order_by":2,"name":"Victor Olowe","email":"","orcid":"","institution":"Federal University of Agriculture, Abeokuta (FUNAAB)","correspondingAuthor":false,"prefix":"","firstName":"Victor","middleName":"","lastName":"Olowe","suffix":""},{"id":464850883,"identity":"0af68646-66f1-47ca-898a-83818dabbccb","order_by":3,"name":"Christopher Adejuyigbe","email":"","orcid":"","institution":"Federal University of Agriculture, Abeokuta (FUNAAB)","correspondingAuthor":false,"prefix":"","firstName":"Christopher","middleName":"","lastName":"Adejuyigbe","suffix":""}],"badges":[],"createdAt":"2025-05-25 21:53:22","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-6745763/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-6745763/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":83804003,"identity":"355729ec-b529-4388-b8f8-5aef331b1433","added_by":"auto","created_at":"2025-06-03 04:18:37","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":395457,"visible":true,"origin":"","legend":"","description":"","filename":"FADEYIO.J25May.pdf","url":"https://assets-eu.researchsquare.com/files/rs-6745763/v1_covered_747396d1-d152-4f1f-9e47-6f84a66b5b81.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Agronomic responses of selected improved sorghum (Sorghum bicolor L. 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This study investigated the agronomic performance of three improved sorghum varieties (SAMSORG 44, SAMSORG 47, and SAMSORG 48) in response to poultry manure application (0, 2.5, and 5.0 t ha⁻¹) at the Certified Organic Research Plots of the Institute of Food Security, Environmental Resources and Agricultural Research (IFSERAR), FUNAAB (June – December, 2023) and the Organic Agriculture Professionals in Tertiary Institutions in Nigeria (OAPTIN), FUNAAB (September – November, 2024). The experiments were laid out in randomized complete block design with three replications. Results revealed that manure application had no significant (p \u003c 0.05) effect on days to 50% flowering, 100% flowering, and maturity in both years although there was significant (p \u003c 0.05) varietal effect on them. SAMSORG 44 exhibited the earliest flowering and the shortest time to maturity. 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