Aller au contenu principal

page search

Displaying 241 - 252 of 73560

A framework for disaggregating remote-sensing cropland into rainfed and irrigated classes at continental scale

Décembre, 2023
Global

Agriculture consumes the largest share of freshwater globally; therefore, distinguishing between rainfed and irrigated croplands is essential for agricultural water management and food security. In this study, a framework incorporating the Budyko model was used to differentiate between rainfed and irrigated cropland areas in Africa for eight remote sensing landcover products and a high-confidence cropland map (HCCM). The HCCM was generated for calibration and validation of the crop partitioning framework as an alternative to individual cropland masks which exhibit high disagreement.

Episode 1: Introducing...Policy Pathways

Décembre, 2023
Global

Confronting sustainable development challenges requires system transformation in Food, Land, and Water! Policy Pathways invites policymakers and sustainable development stakeholders to share their expertise on the policy solutions that can advance system transformation across the globe. CGIAR Research Initiative on National Policies and Strategies has produced a series of policy coherence reports focused on India, Colombia, Nigeria, Kenya, Egypt, and Laos.

‘Squeezing Out’ the Nile Delta’s drainage water to irrigate Egypt’s desert land

Décembre, 2023
Global

Egypt’s quota of Nile River water has been constant since the 1950s, despite the continual agricultural land expansion. To facilitate land reclamation, Egypt has reallocated Nile water from downstream users, mostly smallholders in the ‘old lands’ of the Delta. As water demands have grown, more attention has gone to the reuse of waste/drainage water as a reliable source for irrigated agriculture in the “old lands”.

Earth observation-based rice mapping studies in Vietnamese Mekong Delta compared to global context: a bibliometric analysis

Décembre, 2023
Nigeria

A bibliometric study on mapping the rice cropping systems in VMD is crucial for understanding the trend of EO-based rice mapping and how remote sensing technologies are essential to address the food security issue in the region. This article presents an overview of Earth observation (EO)-based rice mapping strategies since 1979, prioritizing the scope of data, approaches, and techniques derived from 3700 research articles worldwide and contrasting them with the Vietnamese Mekong Delta (VMD).

A critical analysis of soil (and water) conservation practices in the Ethiopian Highlands: implications for future research and modeling

Décembre, 2023
Global

Soil and water conservation have been traditionally part of farming practices for thousands of years. Despite massive efforts to implement modern soil and water conservation practices (SWCPs) in the Ethiopian Highlands, soil erosion increased after the 1970s when social and political events led to a remarkable change in land use. This review aims to critically analyze the impact of conservation practices on soil loss and crop yield and highlight research and modeling gaps.

Land suitability analysis for cereal-forage legume mixed cropping system

Décembre, 2023
Global

Ethiopia's highland mixed crop-livestock farming system is one of the country's primary agricultural systems, where crop and livestock production is integrated. However, Ethiopia's mixed farming system, which is dominated by resource-poor smallholder farmers, is frequently confronted with feed shortages and land degradation in the form of soil erosion and nutrient depletion, resulting in low agricultural production. Assuring sustainable agricultural output (both from crop and livestock sub-sector) in the mixed crop-livestock system is becoming a key challenge.

Barriers to the uptake of solar-powered irrigation by smallholder farmers in sub-saharan Africa: A review

Décembre, 2023
Global

Irrigation expansion is critical for agricultural and rural development, food and nutrition security, and climate change adaptation in Sub-Saharan Africa (SSA). Lack of accessible energy for irrigation development due to limited off- and on-grid infrastructure and the resulting dependence on costly fuel-based irrigation have been key inhibiting factors for irrigation expansion in the region. Off-grid solar-powered irrigation pumps (SIPs) can overcome many of the energy access and other challenges in the region, but their uptake has been slow.

Fate and transport modelling for evaluating antibiotic resistance in aquatic environments: Current knowledge and research priorities

Décembre, 2023
Global

Antibiotics have revolutionised medicine in the last century and enabled the prevention of bacterial infections that were previously deemed untreatable. However, in parallel, bacteria have increasingly developed resistance to antibiotics through various mechanisms. When resistant bacteria find their way into terrestrial and aquatic environments, animal and human exposures increase, e.g., via polluted soil, food, and water, and health risks multiply.

Securing nature’s contributions to people requires at least 20%–25% (semi-)natural habitat in human-modified landscapes

Décembre, 2023
Global

The cascading effects of biodiversity decline on human well-being present a pressing challenge for sustainable development. Conservation efforts often prioritize safeguarding specific species, habitats, or intact ecosystems but overlook biodiversity’s fundamental role in providing Nature’s Contributions to People (NCP) in human-modified landscapes.

Gender norms and social transformation of agriculture in Sub-Saharan Africa

Décembre, 2023
Global

There is a paucity of scientific information regarding gender norms and social transformation in the Sub-Saharan region. This has contributed to the insufficient articulation of gender issues in the proposed agricultural programmes and visions, such as the African Union’s Agenda 2063 and the Malabo Declaration. These efforts premise the transformation of the African continent on the foundation of the agricultural sector, a critical pillar in most countries in Sub-Saharan Africa.

Predicting the distribution of plant species from southern South America: are the hotspots of genetic diversity threatened by climate change?

Décembre, 2023
Global

Biodiversity in all its dimensions is being threatened by climate change and the impact of human activities. Genetic diversity is a key dimension of biodiversity underlying adapta- tion to global changes. Here we assess the impact of climate change on plant genetic diver- sity in a region located in the southernmost portion of Argentina and Chile range. We com- piled available published research on population genetics of 22 plant species from forests, monte and steppe ecoregions and modelled the impact of future climates on their suitability distributions.