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Climate variability, agriculture and forestry: Towards sustainability
World Meteorological Organization (WMO) ; Desjardins R.L.; Janzen H.; et al. - WMO, 2002 (WMO-No. 928)This publication discusses the main causes of global climate variation and the direct effects of changes in atmospheric composition. Examples of increasing the adaptability of agriculture to climate variability are given, and management strategies to reduce the production of greenhouse gases from agriculture are discussed.CAgM Report, 87. Report of the CAgM Working Group on Weather and Climate Related to Agricultural Production
World Meteorological Organization (WMO) ; Chan A.K.; Dawod M.A.A.; et al. - WMO, 2001 (WMO/TD-No. 1079)
CAgM Report, 85. Agrometeorological information needs in agricultural production: report of the Working Group on the Validation of Information Requirements for Agricultural Crops
World Meteorological Organization (WMO) ; Agbangla A.D.; Diemer P.; et al. - WMO, 2001 (WMO/TD-No. 1030)
Weather, Climate and Food Security
This booklet, WMO's contribution to the World Food Summit - 5 years later (Rome, 2002) illustrates the importance of weather and climate issues in ensuring world food security and the role of WMO in contributing to world food security.
Tiempo, clima y seguridad alimentaria
Se calcula que para 2020 la población mundial se elevará a 7,5 mil millones de personas, un aumento que, según estos cálculos se producirá en gran parte en el mundo en desarrollo. Ello significará, por ejemplo, que para satisfacer la creciente demanda de cereales los agricultores tendrán que producir un 40% más de granos en 2020. A pesar de que entre 1986 y 1998 se registró un incremento de la producción y del rendimiento de cereales a escala mundial, la producción media de cereales por habitante se mantuvo estacionaria durante ese período, y de hecho disminuyó en África y Oriente Medio. Esta ...
Le temps, le climat et la sécurité alimentaire
La population mondiale devrait atteindre 7,5 milliards d’habitants en 2020. La poussée démographique surviendra surtout dans les pays en développement. Il faudra produire alors 40 pour cent en plus de céréales pour répondre à la demande mondiale. Si ce secteur a bénéficié de gains de production et de rendement entre 1986 et 1998, le volume moyen de céréales produit par habitant a stagné à l’échelle mondiale. Il a même baissé en Afrique et au Moyen-Orient. Le recul noté dans plusieurs régions nuit gravement à la sécurité alimentaire et à la lutte contre la pauvreté. A cela s’ajoute une autre me ...AGM, 01. Coping with Drought in Sub-Saharan Africa : Better Use of Climate Information
This report captures the Kadoma Ranch workshop deliberations on the outcome of the survey and recommendations for a programme to address farmers' needs for information on climate and drought. The major partners who supported this work include USAID, the US Drought Mitigation Center, the US National Oceanographic and Atmospheric Administration, the UNCCD Global Mechanism and the Government of Zimbabwe through National Meteorological Directorate.Performance analysis of on-demand pressurized irrigation systems
Lamaddalena Nicola; Sagardoy J.A.; Food and Agriculture Organization (FAO) - FAO, 2000 (FAO irrigation and drainage paper-No. 59)The main objective of this publication is to analyse the performance of pressurized irrigation systems operating on-demand (also under other conditions) and to provide revised criteria for the design of such irrigation networks. For this purpose, new approaches and a computer tool (COPAM) have been developed. Calculation examples have been included to demonstrate the procedures and facilitate the understanding and practical use of formulae. This publication should be of particular interest to irrigation district managers, consultants, irrigation engineers and companies, university professors, ...Soil salinity assessment : methods and interpretations of electrical conductivity measurements
This paper presents updated technology for assessing soil salinity based on measurement of electrical conductivity. The technology has been extensively and successfully field tested, and it is sound, reliable, accurate and suited to a wide variety of useful applications. The required equipment is commercially available. The advocated instrumental methodology is practical, cost effective and well developed for all general applications. It is cheaper, faster and more informative than traditional methods of salinity measurement based on soil sampling and laboratory analysis.Crop evapotranspiration : guidelines for computing crop water requirements
Allen Richard G.; Pereira Luis S.; Raes Dirk; et al. - FAO, 1998 (FAO irrigation and drainage paper-No. 56)This publication presents an updated procedure for calculating reference and crop evapotranspiration from meteorological data and crop coefficients. The procedure, first presented in FAO Irrigation and Drainage Paper No. 24, Crop water requirements, in 1977, allows estimation of the amount of water used by a crop, taking into account the effect of the climate and the crop characteristics. The publication incorporates advances in research and more accurate procedures for determining crop water use as recommended by a panel of high-level experts organized by FAO in May 1990. The first part of th ...
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