Uwe Grewer

• Doctor of Philosophy
• Research Fellow at University of Southern Queensland

The adoption of suitable crop cultivars is central to the sustainable intensification of smallholder cropping systems across Sub-Saharan Africa and plays a crucial role in improving smallholder incomes and food security. Breeding programmes have significantly increased the availability of early-, mid-, and late-maturing crop cultivars tailored to t...

Adopting early-maturing maize varieties can substantially increase yield and yield stability in suitable environments. Actionable recommendations that specify where early-maturing varieties can be suitably applied are lacking across low-income countries. We found for maize in Malawi that varieties with longer maturity duration provide on average th...

Integrating weather forecasts into decision support systems empowers farmers to optimise irrigation schedules, thereby boosting crop yields and conserving water. However, inaccurate forecasts can jeopardise productivity and irrigation efficiency. This study combines a crop model with a stochastic pseudo-weather forecast algorithm to: (1) determine...

Climate change poses a serious risk to the economic growth of sub-Saharan Africa. Sustainable enhancement of resilience and mitigation capacity of small farm households is a major political economy goal. This paper has the objective to assess the on-farm economic and mitigation benefits of climate-smart agriculture production and their cost-effecti...

The sustainable intensification of agriculture is a widely utilized research and policy concept that has been subject to an extensive body of scientific literature. A key aspect of the concept is its multi-dimensional and cross-disciplinary nature, and the need for cross-disciplinary research methodologies that integrate biophysical and socio-econo...

This article analyses the greenhouse gas (GHG) impact potential of improved management practices and technologies for smallholder agriculture promoted under a global food security development program. Under 'business-as-usual' development, global studies on the future of agriculture to 2050 project considerable increases in total food production an...

This module articulates a theory of change for climate-smart agriculture. The theory of change serves as a foundation for a step-by-step guide for implementing a national climate-smart agricultural strategic framework. The first section of the module describes the elements of the theory of change. Based on this theory, the second section lays out t...

The Kagera Transboundary Agro-ecosystem Management Project (Kagera TAMP) targets, as one of its central outcomes, the increase in area that is cultivated under Sustainable Land Management (SLM) practices as a means to achieve development and environmental objectives. The adoption of SLM practices by smallholder farmers in the project area targets...

The agricultural development project, Peru Cacao Alliance (PCA), has contributed to climate change mitigation. Estimated carbon sequestration from perennial crop expansion, which was –211,467 tCO2e metric tonnes of carbon dioxide equivalent per year, more than offset increased greenhouse gas emission (GHG) from fertilizer and pesticide management (...

An analysis of the potential climate change mitigation impact of the project entitled Agricultural Development and Value Chain Enhancement Activity II (ADVANCE II) in Ghana shows that an approximate reduction in greenhouse gas (GHG) emissions of 100% will be possible. When project targets are achieved, ADVANCE II will transform the project area fro...

Analysis of the potential mitigation impacts of the agricultural development project Chanje Lavi Plantè in Haiti indicated that large amounts of carbon sequestration could be achieved through reforestation and perennial crop expansion. The project’s strategy for watershed and landscape restoration links investments in profitable orchard systems wi...

Climate-smart agriculture (CSA) would enhance the capacity of farming systems to sustainably support food security in the context of climatic changes. CSA practices may constitute an ex-ante adaptation strategy while also generating environmental benefits in the form of climate change mitigation. However, questions arise about the profitability of...

Questa Guida Rapida offre una solida panoramica e una buona comprensione della metodologia, dei dati necessari, dell’applicazione e dell’uso finale dello strumento di Bilancio del Carbonio Ex-ante (EX-ACT). Tale guida completa il piú esauriente Manuale dell’Utente di EX-ACT che mira a far acquisire all’utente le competenze necessarie per un uso ind...

Данное краткое руководство включает в себя общий обзор Метода оценки углеродного баланса на основе предполагаемых величин (EX-ACT), а также описание методики данной системы, ее информационные потребности и сферу использования. Данная система дополняет более полное руководство пользователя к системе EX-ACT. Настоящее руководство делится на две части...

Climate-smart agriculture (CSA) aims at enhancing the capacity of farming systems to sustainably support food security in the context of climatic changes (CC). Questions arise about the profitability of alternative farming options and their cost-effectiveness in mitigating CC. A large dataset has been built through household surveys, key informant...

The quantification of agricultural greenhouse gas (GHG) emissions is an important component of the Climate Smart Agriculture (CSA) agenda, and a key step in managing and ultimately reducing those emissions in a cost-effective manner. The scale and speed of climate change requires considerable investment in filling knowledge gaps and in research, fo...

Promising sustainable land management (SLM) options are available to reverse land degradation. Yet, land degradation and desertification are threatening people’s livelihoods and food security, particularly in the dry areas with unfavourable climate variability and change. We propose a guiding opportunistic approach to reverse this trend. The approa...

“Sustainability” has become a conundrum for primary commodity industries: something everyone aspires to and demands but something that is difficult to define in practical terms. This report by the ICAC Expert Panel on Social, Environmental and Economic Performance of Cotton Production (SEEP) will contribute to an understanding of how “sustainabilit...

Ce Guide Rapide apporte une présentation générale de l’outil Ex‐Ante Carbon‐balance Tool (EX‐ACT). Il offre une vision globale de l'outil, de la méthodologie, des données requises, mais aussi son application et de son utilisation finale. Il complète le Manuel d'Utilisation d'EX‐ACT, disponible en anglais. Ce guide aide l'utilisateur à maitriser les...

This Quick Guidance material provides a well-founded overview and understanding of methodology, data needs, application and final use of the Ex-Ante Carbon-balance Tool (EX-ACT). It complements the more comprehensive EX-ACT User Manual that is targeted at leading users to proficiency in the independent use of the tool. The Quick Guidance is thereby...

The Ex-Ante Carbon-balance Tool (EX-ACT) is an appraisal system developed by FAO providing ex-ante estimates of the impact of agriculture and forestry development projects, programs and policies on the carbonbalance. The carbon-balance is defined as the net balance from all GHGs expressed in CO2 equivalent that were emitted or sequestered due to pr...

This module looks at assessment, monitoring and evaluation frameworks that are necessary for the successful adoption of climate-smart agriculture (CSA). Focus is placed mainly at the subnational and national levels. However, some case studies address activities at the farm or project level. The module presents an overview of important climate chang...

The paper at hand analyses how newly established Farmer Based Organizations (FBOs) can be a functioning cooperative solution for the provision of services in economically marginal rural areas. It analyses the approach to enhance livelihoods by the introduction of organizational structure as well as institutionalized and expectable action as part o...