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The uncontrolled rapid population growth in our regions and strong industrialization are putting pressure on natural resources, accelerating climate change and desertification. This study aims to follow the evolution of land use in the N'ZI watershed. Three images from Landsat 4 & 5 (1986), Landsat 7 (2000, and Landsat 8 (2020) were used to carry out this study. Remote sensing and geographic information systems (GIS) were used to monitor land cover as a whole. Various treatments were performed using Envi 5.1 and ArcGIS 10.4.1 software programs. The results showed that changes took place during the periods of 1986-2000, 2000-2020, and 1986-2020. The results of the analysis showed the regression of water surfaces from -64.95% to -52.47% during the period of2000-2020 and 1986-2020, on the other hand, there is a great increase in bare-ground dwellings (373.63%) and low-cover soils (10.60%). These progressions were due to the destruction of forests -86.93%, savannas -3.97%, and agricultural areas -9.30% between 1986 and 2020 Hosted fileListe -Tableau_article.docx available at https://authorea.com/users/521645/articles/611128land-use-analysis-of-the-n-zi-watershed-of-c%C3%B4te-d-ivoire-using-multi-date-andmulti-source-satellite-data 1

The forest resource of Côte d'Ivoire was estimated at 16 million hectares in 1900, the country's forest cover was only 7,850,864 ha in 1986 and 3,401,146 ha in 2015(BNETD & Tera, 2016. The country lost a total of 78% of its crop cover. Due to the expansion of agriculture which occupies about 62% of the Ivorian territory (BNETD & Tera, 2016), forest space has fallen to over 2 million hectares today (Assoma et al., 2021;Koné et al., 2021).Clear forests and forested savannahs experienced a decline of more than 14.95%, a decrease of 1.93% in dense forests and shrubby and/or grassy savannas of less than 15.15% were estimated using Landsat satellite images between 2000 and 1990 on the N'ZI catchment area using the Isodata classification method (A. M. Kouassi, 2010). Forests are composed of secondary degraded forests around the river N'ZI in particular (17% degraded forest, 10% clear forest and 3% gallery forest) (Noho et al., 2018). The N'ZI river basin constitutes a feeding zone between the savannah and forest zones. This basin was the cocoa and coffee loop from 1960 to 1980 (Yao et al., 2022). The demographic explosion of the study area from 900,000 to 3,030,381 inhabitants (INS, 2014), constituted an anthropogenic and land cause created a great pressure on resources, including land degradation resulting in the abandonment of land to other sources of income.In the search for information leading to the abandonment of land to other more productive regions, remote sensing and geographical information systems (GIS) have been chosen to monitor the evolution of land use of N'ZI watershed to inform public opinion. Updating land use and monitoring the evolution of vegetation cover are of great importance for economic development in our regions. As a result, remote sensing and satellite imagery are seen as essential for monitoring and managing landscapes (H. Chen et al., 2021). Land cover mapping and analysis of spatio-temporal changes and disaster detection through the use of remote sensing and satellite imagery has been a great success worldwide (

The uncontrolled rapid population growth in our regions and strong industrialization are putting pressure on natural resources, accelerating climate change and desertification. This study aims to follow the evolution of land use in the N'ZI watershed. Three images from Landsat 4 & 5 (1986), Landsat 7 (2000, and Landsat 8 (2020) were used to carry out this study. Remote sensing and geographic information systems (GIS) were used to monitor land cover as a whole. Various treatments were performed using Envi 5.1 and ArcGIS 10.4.1 software programs. The results showed that changes took place during the periods of 1986-2000, 2000-2020, and 1986-2020. The results of the analysis showed the regression of water surfaces from -64.95% to -52.47% during the period of2000-2020 and 1986-2020, on the other hand, there is a great increase in bare-ground dwellings (373.63%) and low-cover soils (10.60%). These progressions were due to the destruction of forests -86.93%, savannas -3.97%, and agricultural areas -9.30% between 1986 and 2020 Hosted fileListe -Tableau_article.docx available at https://authorea.com/users/521645/articles/611128land-use-analysis-of-the-n-zi-watershed-of-c%C3%B4te-d-ivoire-using-multi-date-andmulti-source-satellite-data 1

Aims: This study is to ascertain nutrient content and antioxidant compounds of four varieties of Lycopersicon esculentum Mill. (UC82b, Amiral F1, Local cotelette and Local cerise) grown in Cote d’Ivoire. Study Design: This study is to assess the nutritional and antioxidant value of tomatoes (Lycopersicon esculentum Mill.) grown in Cote d’Ivoire in order to know if they can help to prevent against oxidative stress. Place and duration of Study: Four ripe tomato varieties were collected from different tomato fields in Yamoussoukro district (Cote d'Ivoire) during season from December 2016 to January 2017. The determination of nutrient content and antioxidant compounds were ascertained at the LAPISEN of INPHB (Yamoussoukro). Methodology: Macronutrient and micronutrient of the four tomato varieties collected were determinate. Then, lycopene, polyphenol and flavonoid contents were assessed. The antioxidant capacity of tomato extracts was evaluated using DPPH method. Results: Among the varieties studied, Amiral F1 has the highest antioxidant capacity with an EC50 of 3.47 mg/mL and the highest total polyphenol content (17.5 mg/100 g EAG of fw). Local cotelette variety is the richest in lycopene (2.9 mg/100 g of fw) and vitamin C (35.4 mg/100 g of fw). In addition, this variety also has the highest levels of calcium (31 mg/100 g of fw), magnesium (21 mg/100 g of fw) and potassium (333 mg/100 g of fw). UC82b is the best source of iron (0.065 mg/100 g of fw), phosphorus (23 mg/100 g of fw), manganese (0.086 mg /100 g of fw) and zinc (0 11 mg/100 g of fw). Conclusion: This investigation showed that the different studied varieties of tomato possessed high antioxidant capacities. As a result, they could be used to fight against oxidative stress.