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Sponsored Artificial Intelligence: A Modern Approach, Global Edition Artificial Intelligence: A Modern Approach, Global Edition

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U. H. Onyemachi

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2 papers indexed here

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Open access Aug 2026

Determinants of Smallholder Rubber Yield in Southern Nigeria: Empirical Evidence from OLS, Ridge, Lasso, PCR and PLS Models

Natural rubber production remains important to smallholder agriculture in Southern Nigeria, but yields are constrained by suboptimal input use and correlated production factors. This study examined determinants of rubber yield using farm-level data from 200 farms across three Nigerian states for 2021–2025, obtained fro...

E. I. Eguagie, C. S. Mesike, H. Umar et al. · 0 citations
Open access Sep 2026

HEAVY METAL TOXICITY AND NUTRIENT ANTAGONISM IN NIGERIAN COCOA (Theobroma cacao L.): SOIL–PLANT TRANSFER, FOOD SAFETY RISK AND MULTIVARIATE ASSESSMENT IN ABIA AND OYO STATES

Heavy metal contamination and nutrient antagonism in cocoa ecosystems have become a critical environmental and food safety concern in tropical agricultural systems because of the increasing anthropogenic activities, prolonged agrochemical use, and declining soil quality maintenance. This study evaluated heavy metal tox...

U. H. Onyemachi, O. F. Onyemachi, B. Nduka et al. · 0 citations

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