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Impact of rainfall variability on cereal yield in the Fez-Meknes region (Morocco)

Belmahi Mohamed, Hanchane Mohamed, Benbaqqal Hicham, Kabach Mohammed, Zouhri Driss, Kessabi Ridouane, Elkhazzan Bouchta, Zriouli Khalid

Ecological Engineering & Environmental Technology

2025

Vol. 26, iss. 2

109--121

The Fez-Meknes region is distinguished by its agricultural vocation and its emergence as a hub in the agro-food industry. This study aims to assess the main crop yield, production, and percentage of the agricultural area within each province of the Fez-Meknes region from 2000 to 2020, based on an analysis of descriptive statistics and cartography data. The objective is to determine the national ranking of autumn cereals within the region. Then, multiple linear regression between precipitation and cereal yield in the region’s provinces was established, and the trend in sown areas and cereal yield was analysed using the Man Kendall test. The results revealed that the area sown to autumn cereals accounted for 15% of the national cereal area. Despite that, regional cereal production is ranked second nationally after the Casablanca-Settat region, with a small difference that does not exceed 1.5%. Regarding regional provinces, Taounate and Taza account for almost half of the region’s cereal production. The correlation coefficient between monthly precipitation and cereal yield ranged from 0.51 in Boulmane province to 0.84 in Fez and Moulay Yaacoub province. The coefficient of determination ranged from 0.21 in Boulmane province to 0.70 in Fez province. On the other hand, precipitation in November, December, January, and March had the greatest impact on cereal yields. The differences between observed and estimated yields using multiple regression are acceptable in all region’s provinces, especially when only one predictor was retained. Finally, the Man-Kendall test indicates that the area sown to autumn cereals has a slight downward trend of 4965 ha/year, with a significance of α = 0.07. However, cereal yield also tends to increase by 0.34 q/year with a p- value α = 0.12.

The Study of Correlation Between Acute Respiratory Infections and Oil Mills Pollution in Fez Rural (Morocco)

Essahale Adil, Benbaqqal Hicham, Karrouch Lahcen, Moumni Mohieddine

Ecological Engineering & Environmental Technology

2024

Vol. 25, iss. 9

215--222

In order to evaluate the impact of olive activities on the population health in Fez rural, which is affected by air pollution, a retrospective study of acute respiratory infections (ARI) and chronic was studied (about ten years) in the commune of Ain Taoujdate (30 km of Fez center), known by its strong pollution particularly that of the air caused by industrial activity. Method using was the examination of medical records from 2004 to 2015. Analyzing the evolution of respiratory infections at Ain Taoujdate, we noticed a remarkable and repetitive increase, during olive tree campaign and in the spring (in each year), following the air pollution in the commune and abundance of pollen (pollinosis). Very high cases of pneumopathies recorded during the month of December 2004 and which reached 305 and 124 cases successively and which corresponds to the most important triturating activity during these twelve years of study. On the other hand the asthma crisis of Ain Taoujdate, shows a very large value in olive oil milling season. The main cause seems to be air pollution of Ain Taoujdate, since a large oil mill that releases a huge amount of fume is installed close to the population. Statistical analyzes using principal component analysis (PCA) and ascending hierarchical classification (HAC), were able to show an eventual correlation. This work excludes microbial infections; its limitation is the absence of air quality data and was the consequences to take stock of the impact of air pollution caused by oil mills on respiratory health.