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Nitrogen Fixation in Tropical Cropping Systems
Nitrogen fixation by leguminous plants is especially important when farmers are trying to minimise fertilizer use for cost or environmental reasons. This second edition of the highly successful book, first published in 1991, contains thoroughly updated and revised material on the theory and practice of nitrogen fixation in tropical cropping systems.
Ground Zero?
The Ground Zero project aims to provide a framework of robust, easily measurable and verifiable indicators and methods for the assessment of the carbon footprint, soil health and biodiversity in cocoa and coffee production systems.
Nitrogen Fixation in Tropical Cropping Systems
Tropical environments: climats, soils and cropping systems; Nitrogen fixing organisms in the tropics; The process of nitrogen fixation; Assesment of the nitrogen fixation; Cereal crops and grasses: free-living and roat associated nitrogen fixing bacteria;Ewtland rice: cyanobacteria, Azolla and green manures cyanabacteria; Grain legumes; Pasture improvement: introduction of legumes; Plantation crops: understorey legumes and shade trees; Legumes in multiple cropping: crop rotations, green manures, leys and intercrops; Agroflorestry: nitrogen fixing trees in integrated agriculture; Environmental constraints to nitrogen fixation; Pat approaches: successes and failures; Future benefits: an ecological approach to agriculture.
Transfrontier Conservation Areas
The introduction of transfrontier conservation areas (TFCAs) in southern Africa was based on an enchanting promise: simultaneously contributing to global biodiversity conservation initiatives, regional peace and integration, and the sustainable socio-economic development of rural communities. Cross-border collaboration and eco-tourism became seen as the vehicles of this promise, which would enhance regional peace and stability along the way. However, as these highly political projects take shape, conservation and development policymaking progressively shifts from the national to regional and global arenas, and the peoples most affected by TFCA formation tend to disappear from view. This book...
Agronomy for Development
Cover -- Title -- Copyright -- CONTENTS -- List of abbreviations -- List of contributors -- Acknowledgements -- 1 Knowledge politics in development-oriented agronomy -- 2 On the movement of agricultural technologies: packaging, unpacking and situated reconfiguration -- 3 South-South cooperation and agribusiness contestations in irrigated rice: China and Brazil in Ghana -- 4 GM crops 'for Africa': contestation and knowledge politics in the Kenyan biosafety debate -- 5 Systems research in the CGIAR as an arena of struggle: competing discourses on the embedding of research in development -- 6 One step forward, two steps back in farmer knowledge exchange: 'scaling up' as Fordist replication in drag -- 7 When the solution became a problem: strategies in the reform of agricultural extension in Uganda -- 8 Sweet 'success': contesting biofortification strategies to address malnutrition in Tanzania -- 9 Crops in context: negotiating traditional and formal seed institutions -- 10 Laws of the field: rights and justice in development-oriented agronomy -- 11 A golden age for agronomy? -- References -- Index
Driven by Nature
Biological management of nutrient supply to plants is intrinsically more complex than the provision of nutrients as inorganic fertilizers. We need to know whether the nutrients released are retained or lost from the system, whether rates of decomposition can be manipulated to improve nutrient use efficiency, and how the various fractions of plant residues translate into pools of organic matter in soil. Only then can predictive models for nutrient release, plant uptake and soil organic matter dynamics be truly tested and validated. This book brings together contemporary ideas on the characterization and manipulation of plant quality and especially its role in soil organic matter formation and...
Nitrogen Fixation in Tropical Cropping Systems
The second edition of this book, first published in 1991 and intended for students and researchers, contains revised and updated material on the theory and practice of nitrogen fixation in tropical cropping systems. There are 15 chapters in 3 parts. Part I, Introduction, contains 5 chapters on tropical environments (climate, soils and cropping systems), nitrogen fixing organisms, the process of nitrogen fixation, assessment of the role of nitrogen fixation, and cycling of nitrogen in tropical cropping systems. Part II, Tropical crops and cropping systems, comprises 7 chapters on freeliving, root-associated and endophytic nitrogen fixing bacteria of cereal crops and grasses, cyanobacteria and Azolla as green manure for wetland rice, grain legumes, legumes as green manures and cover crops, forage legumes, understorey legumes and shade trees in plantation crops, and nitrogen fixing trees in agroforestry. Part III, optimizing nitrogen fixation, includes 3 chapters on environmental constraints, approaches to enhancement, and future impacts on nitrogen fixation in tropical agriculture. A list of common names and subject index are included.
Methods for Measuring Greenhouse Gas Balances and Evaluating Mitigation Options in Smallholder Agriculture
This book provides standards and guidelines for quantifying greenhouse gas emissions and removals in smallholder agricultural systems and comparing options for climate change mitigation based on emission reductions and livelihood trade-offs. Globally, agriculture is directly responsible for about 11% of annual greenhouse gas (GHG) emissions and induces an additional 17% through land use change, mostly in developing countries. Farms in the developing countries of sub-Saharan Africa and Asia are predominately managed by smallholders, with 80% of land holdings smaller than ten hectares. However, little to no information exists on greenhouse gas emissions and mitigation potentials in small...
