This study aimed to identify fertilization options for improving cassava productivity and profitability in two contrasting regions of the Central African Republic. The Pissa (guinea forest) and Damara (savannah). The study adopted a randomized complete block design with four treatments replicated four times in a plot size of 7 m by 7 m. The treatments were; T1 (Control), T2 (Peasant practice), T3 (sole NPK), and T4 (Cow manure+NPK). We performed the analysis of variance (ANOVA) using R statistical software version 3.1.2. The yield attributes and growth parameters significantly varied (p=0.05) with application of NPK and NPK plus manure. The use of 3 t ha -1 of cow manure and 90N-30P-180 Kg ha -1 of mineral fertilizer gave the highest yield of 50 and 37 t ha -1 in Pissa and Damara respectively compared to their local controls (no input); This combination also resulted in high profitability with high value-tocost ratios (RVC = 2 in Pissa and 1.3 in Damara). The variability study (48.11%) showed a correlation between growth and production parameters; the effects of fertilizers were much more expressed in the plant's circumference and the number of leaves. The use of organo-mineral fertilizer can give good productivity and profitability. Thus, T4 is a technology that resource-poor households can easily use, although the purchasing power of the peasant farmers in the study area is low.

It aims to examine the impact of nano and non-nano fertilizers on rice quality and productivity. Rice is a staple food crop for a large portion of the global population, the use of fertilizers is essential for optimizing yields and maintaining food security. The emergence of nano-fertilizers presents new opportunities for enhancing nutrient use efficiency, plant growth, and rice quality. However, limitations in existing research, such as the lack of comparative studies and methodological inconsistencies, make it difficult to draw definitive conclusions about the relative merits of nano and non-nano fertilizers. The implementation of nano-fertilizers faces challenges related to cost, accessibility, regulatory frameworks, and public perception. Future research should focus on long-term field studies, investigating potential risks and benefits, and developing sustainable and cost-effective formulations. By addressing these challenges and knowledge gaps, this review seeks to provide a comprehensive understanding of the potential impacts of nano and non-nano fertilizers on rice cultivation and contribute to the development of sustainable agricultural practices.