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Drought, arguably the greatest threat to food production worldwide, was the focal point of a high-level, weeklong workshop supported by The Rockefeller Foundation and CIMMYT, held in May 2004 in Cuernavaca, Mexico.
The improvement in global crop production over the past several decades has been associated with increased use of nitrogen (N) fertilizer. However, on average, less than 50% of the nitrogen added to croplands globally is harvested as crop product. Inefficient use of N fertilizer by crops will result in substantial agricultural nitrogen losses, posing threats to human and ecosystem health. Crop production must increase dramatically to meet the growing demand for food and biofuels projected for 2050. To boost crop yield with lowered environmental cost, the use of high-potential crop cultivars and efficient nitrogen fertilizer management are required. Recent advances in N management practices, such as enhanced-efficiency fertilizer use, improved manure management and machine deep placement of fertilizer have opened up new strategies to achieve improved crop production with N use reduction. A better understanding of the key crop traits and regulatory processes in response to N fertilizer managements will facilitate the increase in crop yield, N use efficiency while minimizing impacts on the environment.
With near-comprehensive coverage of new advances in crop breeding for drought and salinity stress tolerance, this timely work seeks to integrate the most recent findings about key biological determinants of plant stress tolerance with modern crop improvement strategies. This volume is unique because is provides exceptionally wide coverage of current knowledge and expertise being applied in drought and salt tolerance research.
This Standard specifies the classification, designation, ordering content, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, package, marking and quality certificate, etc. of hot rolled steel bar of fire resistant for the reinforcement of concrete. This Standard is applicable to the hot rolled plain bars of fire-resistant and hot rolled ribbed bars of fire-resistant.
MPEG-4 is the multimedia standard for combining interactivity, natural and synthetic digital video, audio and computer-graphics. Typical applications are: internet, video conferencing, mobile videophones, multimedia cooperative work, teleteaching and games. With MPEG-4 the next step from block-based video (ISO/IEC MPEG-1, MPEG-2, CCITT H.261, ITU-T H.263) to arbitrarily-shaped visual objects is taken. This significant step demands a new methodology for system analysis and design to meet the considerably higher flexibility of MPEG-4. Motion estimation is a central part of MPEG-1/2/4 and H.261/H.263 video compression standards and has attracted much attention in research and industry, for the ...
This book deals with ways and means of managing food and water security in various agroclimatic environments through the integration of R & D, training, people participation, agronomic practices, economic instruments, and administrative policies. It includes contributions by global experts in the field, who elaborate on the governance of f
Perspectives; The genepools of rice: collecting activities 1983-1990; The network approach; Wild species and land races; Documentation and data management; Preservation of germplasm; germplasm research and utilizatin; Recommendations of working groups.