Factors influencing dryland agricultural productivity

Chimwamurombe, Percy; Mataranyika, Paidamoyo N.

doi:10.1016/j.jaridenv.2021.104489

Cited by 15 publications

(4 citation statements)

References 55 publications

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“…The main worries concerning arid regions and soil deterioration revolve around farm output [ 3 ] and water accessibility [ 4 , 5 , 6 ]. Unstable crop yields, recurring droughts, unpredictable weather patterns, substantial soil erosion, deforestation, and diminished genetic diversity stand as the key concerns for dryland farmers [ 7 ]. When soil accumulates higher concentrations of salt that impede plant growth within the root zone in areas without irrigation, it leads to dryland salinity.…”

Section: Introductionmentioning

confidence: 99%

Low-Cost Optical Sensors for Soil Composition Monitoring

Diaz,

Ahmad,

Parra

et al. 2024

Sensors

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Studying soil composition is vital for agricultural and edaphology disciplines. Presently, colorimetry serves as a prevalent method for the on-site visual examination of soil characteristics. However, this technique necessitates the laboratory-based analysis of extracted soil fragments by skilled personnel, leading to substantial time and resource consumption. Contrastingly, sensor techniques effectively gather environmental data, though they mostly lack in situ studies. Despite this, sensors offer substantial on-site data generation potential in a non-invasive manner and can be included in wireless sensor networks. Therefore, the aim of the paper is to develop a low-cost red, green, and blue (RGB)-based sensor system capable of detecting changes in the composition of the soil. The proposed sensor system was found to be effective when the sample materials, including salt, sand, and nitro phosphate, were determined under eight different RGB lights. Statistical analyses showed that each material could be classified with significant differences based on specific light variations. The results from a discriminant analysis documented the 100% prediction accuracy of the system. In order to use the minimum number of colors, all the possible color combinations were evaluated. Consequently, a combination of six colors for salt and nitro phosphate successfully classified the materials, whereas all the eight colors were found to be effective for classifying sand samples. The proposed low-cost RGB sensor system provides an economically viable and easily accessible solution for soil classification.

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Section: Introductionmentioning

confidence: 99%

Low-Cost Optical Sensors for Soil Composition Monitoring

Diaz,

Ahmad,

Parra

et al. 2024

Sensors

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“…Globally, the drylands face a number of challenges such as water scarcity, land degradation, poor agriculture and livestock productivity 1 – 3 . With increasing population pressure, changing food habits, and economic development, per capita resource availability has been declining rapidly 4 .…”

Section: Introductionmentioning

confidence: 99%

Identifying potential zones for rainwater harvesting interventions for sustainable intensification in the semi-arid tropics

Garg

Akuraju

Anantha

et al. 2022

Sci Rep

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Decentralized rainwater harvesting (RWH) is a promising approach to mitigate drought in the drylands. However, an insufficient understanding of its impact on hydrological processes has resulted in poor resource planning in this area. This study is a meta-analysis of 25 agricultural watersheds representing a range of rainfall and soil types in the semi-arid tropics. Rainfall-runoff-soil loss relationship was calculated at daily, monthly and yearly levels, and the impact of RWH interventions on surface runoff and soil loss was quantified. A linear relationship was observed between daily rainfall and surface runoff up to 120 mm of rainfall intensity, which subsequently saw an exponential increase. About 200–300 mm of cumulative rainfall is the threshold to initiate surface runoff in the Indian semi-arid tropics. Rainwater harvesting was effective in terms of enhancing groundwater availability (2.6–6.9 m), crop intensification (40–100%) and farmers’ incomes (50–200%) in different benchmark watersheds. An average of 40 mm of surface runoff was harvested annually and it reduced soil loss by 70% (3 ton/ha/year compared to 1 ton/ha/year in non-intervention stage. The study further quantified runoff at 25th, 50th and 75th percentiles, and found that more than 70% of the area in the Indian semi-arid tropics has high to medium potential for implementing RWH interventions.

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“…Few current research on climate change, dryland variation, and FS in Africa have been published (Wheeler and von Braun, 2013;Cervigni and Morris, 2016;Guilpart et al, 2017;Li and Zhang, 2017;Leakey, 2018;Schouten et al, 2018;Nyberg et al, 2019;Chimwamurombe and Mataranyika, 2021). Consequently, developed and developing nations started focusing on new tools and strategies for boosting agricultural production to meet future challenges, and improving or advancing techniques that would help deal with food (in) security and monitor the expansion of drylands (Peng et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Climate change–drylands–food security nexus in Africa: From the perspective of technical advances, challenges, and opportunities

Hirwa

Li²,

Qiao³

et al. 2022

Front. Environ. Sci.

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Climate change impacts on drylands pose more vexing risks to socio-ecological systems, resulting in food security issues, biodiversity loss, and livelihood shifts in Africa. This study critically reviewed relevant literature to evaluate the complexities and feedback loops between the climate–drylands–food security (CDF) nexus, which helps assess tactics to attain sustainable dryland ecosystem management under the changing environment. Comprehensive CDF frameworks are explored for dryland dynamics, ecosystem services, and food security (FS), and current high-precision ecosystem observation networks are used to detect regional-level climate variability and identify hotspots. In addition, this review also examines challenges and uncertainties for CDF systems and effective agrarian innovations as a way forward. To bridge the gap from science to policy making in the CDF nexus, it is vital to enhance the impacts and feedbacks of ecohydrological processes on agrarian production, ecosystem service tradeoffs and their effects on livelihoods, and regional development and preservation by optimization of the ecological water security pattern. This state-of-the-art assessment uses acquired information and knowledge to conceptually evaluate the past, current, and future impacts and risks and facilitates decision making through the delivery of long-term sustainability and socio-ecological resilience.

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Factors influencing dryland agricultural productivity

Cited by 15 publications

References 55 publications

Low-Cost Optical Sensors for Soil Composition Monitoring

Low-Cost Optical Sensors for Soil Composition Monitoring

Identifying potential zones for rainwater harvesting interventions for sustainable intensification in the semi-arid tropics

Climate change–drylands–food security nexus in Africa: From the perspective of technical advances, challenges, and opportunities

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