Author : H. R. von Uexkull
Publisher : Food & Agriculture Org.
Page : 74 pages
File Size : 30,78 MB
Release : 1986
Category : Technology & Engineering
ISBN : 9789251023877
Author : Rajat De
Publisher : Food & Agriculture Org.
Page : 52 pages
File Size : 35,50 MB
Release : 1988
Category : Technology & Engineering
ISBN : 9789251026236
Author : Food and Agriculture Organization of the United Nations. Fertilizer and Plant Nutrition Service
Publisher : Food & Agriculture Org.
Page : 44 pages
File Size : 42,74 MB
Release : 1980
Category : Technology & Engineering
ISBN : 9789251009543
Author :
Publisher : Bib. Orton IICA / CATIE
Page : 228 pages
File Size : 25,31 MB
Release :
Category :
ISBN :
Author :
Publisher : Food & Agriculture Org.
Page : 128 pages
File Size : 37,66 MB
Release : 2006
Category : Business & Economics
ISBN : 9789251055922
Most of the world's hunger and poverty occurs in rural areas. The use of fertilizers could improve agricultural productivity in these areas. However, many developing countries attach a low priority to the subsistence / smallholder sector, particularly in disadvantaged areas. This publication summarizes the information from 21 countries: the crops on which fertilizers are used, the social and structural context, appropriate fertilizer application rates and their profitability, arrangements for supplying fertilizers to farmers and for marketing their produce, credit facilities, and research.
Author : Food and Agriculture Organization of the United Nations
Publisher : Food & Agriculture Org.
Page : 152 pages
File Size : 42,61 MB
Release : 2004
Category : Business & Economics
ISBN : 9789251052372
Using data on three countries in sub-Saharan Africa, this report compares macro- and microlevel approaches to determine soil nutrient balances with an innovative mesolevel approach. It highlights the added value that a mesolevel approach can provide in terms of its usefulness to mesolevel stakeholders in articulating and targeting scale-specific soil fertility enhancing measures, and its validity as an entry point for policy-makers and private-sector intervention. Contains numerous color figures and tables.
Author : Rabindra N. Roy
Publisher : Food & Agriculture Org.
Page : 104 pages
File Size : 31,76 MB
Release : 2003
Category : Science
ISBN : 9789251050385
Nutrient-balance assessments are valuable tools for delineating the consequences of farming on soil fertility. Various approaches and methods for different situations have been used in the past. This bulletin presents a state-of-the-art review of nutrient balance studies. It brings out the evolution of the approaches and methods, provides for comparisons among them, features the improvements made, and highlights remaining issues. This analysis will be useful in further development of the assessment methodologies as reliable tools for devising time-scale soil fertility management interventions.
Author : African Association for Biological Nitrogen Fixation. Conference
Publisher : IITA
Page : 512 pages
File Size : 45,32 MB
Release : 1992-10-27
Category : Science
ISBN : 9780471935605
Biological nitrogen fixation in tropical agrosystems: twenty years of biological nitrogen fixation research in Africa; Sustainable agriculture: definition and measurement; Biological nitrogen fixation systems in tropical ecosystems: an overview; A protocol for screening legumes as soil-improving crops; The sustenance of tropical agriculture with multipurpose azolla; Facteurs pedoclimatiques limitant la lixation biologique l'azole; Response of some tropical nitrogen-fixing woody legumes to drought and inoculation with mycorrhiza; Improvement to the Phaseolus/Rhizobium symbiosis, with particular reference to the Caribbean region; Effect of pest management systems on biological nitrogen fixation; Agronomic evaluation of a rock phosphate as a phosphorus source for Leucaena leucocephala grown on an utisol; Nodulation of soybean grown under field conditions and inoculated with Bradyrhizobium japonicum strains; Effect of fertilization and Rhizobium inoculation on the growth of Leucaena and Gliricidia on an alfisol in south-western Nigeria; Early growth and nodulation in Leucaena and Gliricidia and the effects or pruning on biomass productivity; Comparative stude on the growth and productivity of Sesbania and Leucaena in the Central Plateau region, Rwanda; Supernoculation and non-nodulation mutants of soybean; Genetically improved rhizobia and their use in agriculture; Sustainability of nitrogen-fixing cropping systems: Nodulation and nitrogen fixation and transfer in a cowpea/rice cropping system; The role of legumes in sustaiing soil productivity and controlling soil erosion; Fitting soil-improving legumes into inland valley rice-baes cropping systems in West Africa; Herbage yield and soil fertility restoration potential of some tropical forage legumes.
Author :
Publisher :
Page : 322 pages
File Size : 31,17 MB
Release : 1987
Category : Acid soils
ISBN :
Management of acid tropical soils in Southear Asia; Management of acid tropical soils in Africa; Management of acid soil in the humid tropics of Latin America; Management of acid tropical soils in teh savannas of South America; Pedological research in relation to soil fertility; The need for a soil fertility reference base and nutrient dynamics; Surface foil degradation and management strategies for sustained; Efficient use of phosphorus fertilization in acid tropical soil; Management of soil acidity; Reclamation of degraded acid tropical soils in Indonesia; Environmental characterization of acid tropical soils; Socioeconomic considerations in acid tropical soil research; Transfer of acid tropical soil management technology; Denor Agency Involvement with Agricultural Research Netmorks; IBSRAM and its network approach.
Author : Andreas Schulte
Publisher : Springer Science & Business Media
Page : 220 pages
File Size : 21,32 MB
Release : 2013-03-14
Category : Science
ISBN : 3662036495
An understanding of the characteristics and the ecology of soils, particularly those of forest ecosystems in the humid tropics, is central to the development of sustainable forest management systems. The present book examines the contribution that forest soil science and forest ecology can make to sustainable land use in the humid tropics. Four main issues are addressed: characteristics and classification of forest soils, chemical and hydrological changes after forest utilization, soil fertility management in forest plantations and agroforestry systems as well as ecosystem studies from the dipterocarp forest region of Southeast Asia. Additionally, case studies include work from Guyana, Costa Rica, the Philippines, Malaysia, Australia and Nigeria.
