Aims: Most of the land area of Saudi Arabia is either arid or hyper-arid. In the past decades, many efforts have been exerted to increase the green cover in Saudi Arabia, the most recent of which is the Saudi Green Initiative (S.G.I.), launched in 2021. S.G.I.’s main objectives are to increase the green land surface area and decrease carbon emissions. In this paper, the role of dryland agroforestry in mitigating the effects of climate change was reviewed, and its contribution to fulfilling S.G.I. was discussed. Methodology: Previously published literature, scholarly research articles, and conference proceeding papers, on agroforestry systems (A.F.S), carbon sequestration and nutrient dynamics under A.F.S over the past 34 years were critically reviewed, examined, and analysed to find various applications of AFS for climate change mitigation and carbon sinks with focus on arid land. Results: Forests are a vital source for climate change mitigation and adaptation and play a vital role as carbon sinks. A.F.S, eco-friendly and environmentally viable land use and management, provide immense potential to sequester carbon (C). A.F.S. is a reliable tool for increasing C sequestration. As a result of the worth granted to non-timber products, the application of A.F.S. could likewise reduce C emissions to the air by reducing the odds of concrete cutting of trees. Moreover, tree components are a source of C for the soil by means of root and leave decomposition. Conclusion: In the perspective of the high threat facing humanity paused the climate variability and climate change, many nations and countries have taken various measures to tackle it which included protecting natural forests, afforestation, managed the natural regeneration of green cover. A.F.S leads to better land-use efficiency, increases the green cover, and thus helps in mitigating climate change.

The main objective of this study is to analyze the impact of climatic variables (temperature and precipitation) on sorghum productivity in the Cercle of Koutiala in Mali. To do this, the model of the production function was used to estimate the variation of sorghum yield during a period of 30 years (1986-2015). After the test of the unit root of Dickey-Fuller Augmented (ADF), the estimation of the semi-logarithmic model by the Ordinary Least Square method (OLS) showed that the yield of sorghum was affected by the climatic variables. The increase in average rainfall over the period June-September positively affects the performance to a certain threshold. On the other hand, the average temperatures during June-July have no significant effects on the yield. The temperatures observed during August and September, negatively affect the performance of sorghum during the study period to a certain threshold. The precipitations of August and September have a positive impact but not significant on the yield. The interaction between mean precipitation and average temperature during the same period negatively influences the yield of the sorghum. Indeed, the increase of the precipitation combined with an increase of the temperature for the period June to September causes a reduction in the yield of sorghum. Depending on this situation, it is important and necessary to take measures to mitigate the negative impacts of climate on sorghum yield in the Cercle of Koutiala.

Background: There is an increased need for intercropping practice in drylands to increase land-use efficiency. Canopy cover is a great tool to assess agricultural yield, as it is an indicator of plant health and productivity. Methods: The smartphone-based application Canopeo was used to measure the canopy cover (CC) of Clitoria under mixed intercropping with Leucaena and with four (4) fertilization levels (Control, 200 kg, 300 kg and 400 kg of NPK). Forage yield and (CC) were measured during six (6) consecutive harvests. Moreover, forage quality (NPK and protein) was analyzed. Result: The results revealed a high positive correlation between (CC) with crop yield and quality. Also, the application of fertilizers produced higher (CC) associated with higher yield and forage quality. The relatively low correlation of (CC) with yield in intercropping may be due to the high competition of the Leucaena tree. However, the whole intercropping system was positive (with an LER of 2.4), indicating better land-use efficiency. The results concluded that intercropping in drylands would result in better land use. While the application of NPK fertilizers will increase crop (CC), which in turn will reflect in higher forage yield and quality.