Ric Coe

Ric Coe
Consultative Group on International Agricultural Research | CGIAR · World Agroforestry Centre (ICRAF)

About

208
Publications
61,856
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7,970
Citations
Citations since 2016
21 Research Items
4301 Citations
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20162017201820192020202120220100200300400500600700
20162017201820192020202120220100200300400500600700

Publications

Publications (208)
Article
Full-text available
Fodder collection from natural stands generates income in peri-urban areas in the Sahel. Fodder banks show financial and ecological benefits, as increased demand requires sustainable tree management. Fodder production from two commonly used species, Gliricidia sepium (Jacq.) Walp. and Pterocarpus erinaceus Poir. was evaluated for combinations of va...
Article
Full-text available
In 2018, the United Nations Food and Agriculture Organization (FAO) described agroecology in terms of 10 Elements. Using this framework, FAO then designed the Tool for Agroecology Performance Evaluation (TAPE) for assessment of the agroecological state of farms and landscapes as part of their mission to produce globally comparable data. A network o...
Article
Full-text available
While agroforestry is a well-established approach for agroecological intensification, rice is less often integrated with trees than other annual staple crops. The benefits and risks from rice agroforestry practices have not been systematically explored. Considering the need for strategies that may address low fertility and high degradation of arabl...
Article
Full-text available
Assessing the potential drivers of farmers using pesticidal plants for crop protection is essential for wider adoption. However, few studies have focused on collaborative assessments of the underlying trade-offs when using pesticidal plant extracts for pest control. Smallholder farmers in northern Tanzania involved in farmer driven research assessi...
Article
Full-text available
Increasing tree cover and managing trees better on farms in Ethiopia supports livelihoods and the environment but most tree-planting schemes promote only a few species. This research aimed to understand farmers’ tree planting priorities in Oromia, Ethiopia and address challenges involved in meeting them. Tree species and planting niches were elicit...
Article
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In 2013, the Collaborative Crop Research Program (McKnight Foundation), initiated support for farmer research networks (FRNs). FRNs were envisaged as a general approach to networked participatory research aimed at supporting the agroecological intensification (AEI) of smallholder farming in ten countries in Africa and the Andes region in South Amer...
Article
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Agroforestry (AF)-based adaptation to global climate change can consist of (1) reversal of negative trends in diverse tree cover as generic portfolio risk management strategy; (2) targeted, strategic, shift in resource capture (e.g. light, water) to adjust to changing conditions (e.g. lower or more variable rainfall, higher temperatures); (3) veget...
Article
Full-text available
In the current debate on the role of increase soil carbon in addressing both climate change and food security, there is consensus that farmed lands have the higher potential provided the best management practices are implemented. In the Sahel where farms usually have few sparse old trees with declining soil fertility, there is an ongoing re-greenin...
Chapter
Farmers who represent the social and biophysical diversity of their communities participate in the whole research process.
Method
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This guide was written to help researchers understand some of the problems faced when collecting farm input and output data. It offers suggestions on how to reduce some of these problems and minimise errors in data collection.
Article
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Innovation in agronomy by large numbers of smallholder farmers will need to accelerate if global commitments to end hunger are to be achieved in the face of major climate and other global change that are both caused by, and impact, agriculture. Conventional research and development in agronomy have involved a research process that produces technolo...
Book
Full-text available
Guide for PhD and M.Sc students in the agricultural and envrionmental sciences and rural development. Includes guides on preparing project proposals, thesis preparation, literature reviews, developing hypotheses, research methods, surveys, trials and data analysis. It prepares you for writing your thesis and for how to best share the results. It dr...
Conference Paper
Statistics has changed in many ways since the 1960s, when many African countries became independent. Among these changes are an increasing emphasis on data and a set of unifying principles that can simplify the teaching of statistical modelling. These changes have yet to impact training in statistics in many countries. Access to technology is neede...
Conference Paper
In many parts of the world, population growth and agricultural expansion have led to a reduction in uncultivated or 'wild' areas and increasing pressure on land to meet multiple needs. Here we explore the roles that trees play in smallholder livelihood strategies in such places. In January-March 2016 a questionnaire was administered to 160 smallhol...
Article
Full-text available
Abstract Forest and woodland landscape restoration is a key undertaking of renewed interest for forestry and conservation practitioners, but is hampered by the lack of information on the distributions of tree species and of patterns of intra-specific genetic variation. Through the first meta-analysis of its type, we here tested the utility of a hig...
Article
Our paper ‘Loading the dice in favour of the farmer: reducing the risk of adopting agronomic innovations’ revealed mean increases but also large variation in the impact of four agroforestry practises on maize yield, as experienced by farmers in Malawi. This prompted a response from Sileshi and Akinnifesi that was critical of the data and methods us...
Article
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SUMMARY The agricultural research and development institutions in most developing countries are poorly equipped to support the needs of millions of smallholder farmers that depend upon them. The research approaches taken by these systems explicitly or implicitly seek simple, one-size-fits-all solutions for problems and opportunities that are extrem...
Article
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Agricultural development projects frequently promote new crop production technologies for adoption at scale on the basis of research and pilot studies in a limited number of contexts. The performance of these production technologies is often variable and dependent on context. Using an example from the Agroforestry for Food Security Project in Malaw...
Article
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In recent years, many studies have demonstrated the heterogeneity of the smallholder production environment. Yet agronomic research for development (R4D) that aims to identify and test options for increasing productivity has not consistently adapted its approaches to such heterogeneous conditions. This paper describes the challenges facing research...
Article
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Our study tests the relative importance of different attributes of isolated trees in explaining the properties of the regeneration assemblage beneath their crowns to evaluate their effect on the composition of early successional stages and understand the processes underlying this effect. We asked: (1) does the regeneration assemblage contain a high...
Article
Full-text available
In the Sahel, climate variability and change have resulted in a diversity of direct and indirect impacts largely affecting rain-fed farming. Populations in this area mainly rely on rain-fed farming and natural resources to sustain their livelihoods which heightens their risk. The association between occurring climate variability and staple cereal y...
Article
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Rural households living in tropical ecosystems depend heavily on forest trees for valuable nontimber forest products that are, however, undergoing unsustainable harvesting. This study assessed early survival and growth of Allanblackia stuhlmannii (Clusiaceae), a nontimber tree species endemic to Tanzania. A total of 400 seedlings sourced from twent...
Conference Paper
Full-text available
1. Introduction In Tanzania agriculture plays a key role largely for food security and general livelihood of rural communities where 80 percent of people lives and relies on agriculture as a major economic enterprise (URT, 2001). However, land degradation, reflected in soil fertility depletion and declined vegetation cover, is still a major biophys...
Technical Report
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In Sub-Saharan Africa, a major driver of agricultural production is the weather, particularly rainfall. Therefore understanding the weather and climate and how it varies in time and space is important for understanding strategies and risks and making informed farming decisions. Farmers, especially smallholders who do not practice any irrigation, ne...
Article
Projects introducing improved stoves that save firewood and reduce emissions and indoor smoke address real needs but have often not succeeded as expected. One of the reasons may be that lessons have not been learnt effectively. We reviewed the only available comprehensive list of principles for stove project design. We modified it, and added more p...
Article
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Recent high-level policy papers call for scaling-up agroforestry to sustainably increase agricultural production and maintain environmental services. Evidence suggests that this will not be achieved by wide scale promotion of a few iconic agroforestry practices. Instead, three key issues need to be addressed. First, fine-scale variation in social,...
Article
Culture, religion, and technology have shaped the development of society since the dawn of time. This article examines sacredness and happiness-as the common values all religions and cultures share-as the lens of weighing and balancing the perceived risk and benefits associated with agricultural biotechnology. The future of agbiotech rests in true...
Technical Report
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Land health surveillance is the systematic collection, analysis and interpretation of land degradation data, and the formulation of recommendations based on these data to promote, protect and restore land and ecosystem health. We applied the Land Degradation Surveillance Framework (LDSF) to characterize five sentinel sites (each 10 km × 10 km) in t...
Article
Full-text available
Heterogeneity in soil fertility in these smallholder systems is caused by both inherent soil-landscape and human-induced variability across farms differing in resources and practices. Interventions to address the problem of poor soil fertility in Africa must be designed to target such diversity and spatially heterogeneity. Data on soil management a...
Article
Full-text available
The success of agroforestry in semi-arid areas depends on efficient use of available water and effective strategies to limit tree/crop competition and maximise productivity. On hillsides, planting improved tree fallows on the degraded upper section of bench terraces is a recommended practice to improve soil fertility while cropping continues on the...
Article
Full-text available
The case is made for a new type of statistical master's program called MSc in Research Methods. The name of the course reflects the fact it is broader than one in statistics, partly because of the changing nature of research. It is designed to be accessible to two types of students: those who have a mathematical background and those who have a more...
Conference Paper
Computers have been being brought into statistics education since the 1960’s (Sterling & Pollark, 1966). It is now accepted that there is a need to have a less theoretical approach to statistics education. In Kenya the need to change the way statistics is taught is recognised and accepted (Odhiambo, 2002). Internationally the GAISE (Guidelines for...
Article
The high heterogeneity and diverse management effects on trees in agricultural landscapes limit the use of standard allometric equations developed for forests; hence the need to develop robust allometric equations and root:shoot ratios (RS) for more accurate estimation of belowground biomass. Local generic equations were developed from 72 trees (di...
Article
Full-text available
Meeting the reducing emissions from deforestation and degradation (REDD) framework demands stringent carbon measuring, reporting and verifying methods. In most cases, estimates of aboveground carbon stocks rely on allometric equations. Although generic and species-specific allometries have been developed for conventional areas such as forests, thei...
Article
To address the decline in crop productivity in the drylands of West Africa, many initiatives have focused on combating soil degradation. Various practices including (1) parkland trees associated with crops, (2) coppicing trees, (3) green manure, (4) mulching, (5) crop rotation and intercropping, and (6) traditional soil/water conservation have been...
Article
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We explore the relationship between farming practice changes made by households coping with the huge demographic, economic, and ecological changes they have seen in the last 10 years and household food security. We examine whether households that have been introducing new practices, such as improved management of crops, soil, land, water, and lives...
Article
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A defining characteristic of many rainfed tropical agricultural systems is their vulnerability to weather variability. There is now increased attention paid to climate-agriculture links as the world is focused on climate change. This has shown the need for increased understanding of current and future climate and the links to agricultural investmen...
Article
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Climate change and land use change are two forces influencing the hydrology of watersheds and their ability to provide ecosystem services, such as clean and well-regulated streamflow and control of soil erosion and sediment yield. The Soil Water Assessment Tool, SWAT a distributed, watershed-scale hydrological model was used with 18 scenarios of ra...
Article
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Traditionally, crop production in sub-Saharan Africa (SSA) depends primarily on mining soil nutrients. Integrated Soil Fertility Management (ISFM) is an approach for intensifying agriculture in SSA that aims at maximizing the agronomic efficiency (AE) of applied nutrient inputs. ISFM contains the following essential components: proper fertilizer ma...
Article
Maize is becoming the major food crop around Lake Victoria. Major constraints to its production are Striga, stem borer, and declining soil fertility. Innovative integrated technologies have been developed: the [`]push-pull' system (intercropping with Desmodium and surrounded by Napier grass), soybean and Crotalaria rotations, and imidazolinone-resi...
Article
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Technological interventions to address the problem of poor productivity of smallholder agricultural systems must be designed to target socially diverse and spatially heterogeneous farms and farming systems. This paper proposes a categorisation of household diversity based on a functional typology of livelihood strategies, and analyses the influence...
Book
Full-text available
Agroforestry, the inclusion of woody perennials within farming systems, has been both a traditional landuse approach developed by subsistence farmers throughout the tropics, and a livelihood option promoted by landuse managers and international development efforts. Agroforestry systems range from subsistence livestock and pastoral systems to home g...
Article
Full-text available
Agroforestry, the inclusion of woody perennials within farming systems, has been both a traditional landuse approach developed by subsistence farmers throughout the tropics, and a livelihood option promoted by landuse managers and international development efforts. Agroforestry systems range from subsistence livestock and pastoral systems to home g...
Article
Full-text available
A wide range of policy instruments have been devised and applied to support the goals of sustainable forestry management. Community forestry programs can contain elements of several of those instruments. This paper considers the design of community forestry contracts in the Sumber Jaya area of Indonesia where community forestry contracts are agreem...
Article
A large-scale simulation/optimization model provides schedules for operation of water and power for the California State Water Project (SWP). The SWP consists of a series of reservoirs linked by rivers, pumping plants, canals, tunnels, and generating plants and is operated by the California Department of Water Resources. The Department provides wat...
Article
Full-text available
In this research the relative importance of leaf area and microclimatic factors in determining water use of tree lines was examined in sub-humid Western Kenya. Measurements of tree water-use by a heat-balance technique, leaf area, bulk air saturation deficit, daily radiation, and soil water content were done in an experiment with tree lines within...
Article
Full-text available
Field studies were conducted with pigeonpea [Cajanus cajan (L.) Millsp.] in Kenya to determine the influence of photoperiod and temperature on flowering. Variation in temperature was achieved by planting six genotypes at four locations varying in altitude where temperature decreased with increase in altitude and variation in photoperiod was achieve...
Article
This paper looks at responses from participatory on-farm farmer participatory trials that are often measured as ratings (farmers score each given treatment on a scale that is ordered but arbitrary) or rankings (where farmers arrange the treatments in order from most preferred to least preferred). Simple methods, such as the preference statistic tha...
Article
Cosmopolites sordidus (Germar) is an important pest on bananas and plantains. Population build-up is slow and damage becomes increasingly important in successive crop cycles (ratoons). Yield loss results from plant loss, mat disappearance and reduced bunch size. Damage assessment requires destructive sampling and is most often done on corms of rece...
Book
Full-text available
This manual can be downloaded for free from URL http://www.worldagroforestry.org/output/tree-diversity-analysis Effective data analysis requires familiarity with basic concepts and an ability to use a set of standard tools, as well as creativity and imagination. Tree diversity analysis provides a solid practical foundation for training in statisti...
Article
Full-text available
Article
Full-text available
This manual can be downloaded for free from URL http://www.worldagroforestry.org/output/tree-diversity-analysis Effective data analysis requires familiarity with basic concepts and an ability to use a set of standard tools, as well as creativity and imagination. Tree diversity analysis provides a solid practical foundation for training in statisti...
Article
Full-text available
This manual can be downloaded for free from URL http://www.worldagroforestry.org/output/tree-diversity-analysis Effective data analysis requires familiarity with basic concepts and an ability to use a set of standard tools, as well as creativity and imagination. Tree diversity analysis provides a solid practical foundation for training in statisti...