The Effect Of Azolla On Nitrogen Use Efficiency In Rice Wheat Rotations Of Nepal
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Author | : Junoo Kamal Tuladhar |
Publisher | : Cuvillier Verlag |
Total Pages | : 130 |
Release | : 2004 |
Genre | : Science |
ISBN | : 3898739740 |
The low productivity of the rice-wheat cropping system in Nepal is associated with a low efficiency of applied mineral N in rice. The aquatic fern Azolla was used to reduce N losses via ammonia volatilization from the flooded lowland rice in farmers' field conditions in Nepal. The Azolla cover changed the floodwater chemistry, thus reducing ammonia volatilization losses. The use of Azolla in combination with Urea increased rice yields by 15% and reduced urea-N losses from 17-38% to 2-8%. A combined use of Azolla and urea is a viable option to enhance the productivity of rice-wheat systems in Nepal.
Author | : Marcos Garcia |
Publisher | : Cuvillier Verlag |
Total Pages | : 297 |
Release | : 2004 |
Genre | : |
ISBN | : 386537106X |
Duas importantes questões foram levantadas neste estudo: (1) O efeito e destino dos pesticidas em solos de regiões temperadas podem ser diferentes em solos tropicais? (2) Os dados produzidos nas regiões temperadas podem ser usados para a avaliação de risco ambiental nos trópicos?
Author | : Ashabul Anhar |
Publisher | : Cuvillier Verlag |
Total Pages | : 131 |
Release | : 2005 |
Genre | : |
ISBN | : 3865374735 |
Author | : Bao-Le Quang |
Publisher | : Cuvillier Verlag |
Total Pages | : 305 |
Release | : 2005 |
Genre | : |
ISBN | : 3865376274 |
Author | : Damaris Achieng Odeny |
Publisher | : Cuvillier Verlag |
Total Pages | : 115 |
Release | : 2006 |
Genre | : |
ISBN | : 3867279918 |
Author | : Kassahun Tesfaye Geletu |
Publisher | : Cuvillier Verlag |
Total Pages | : 160 |
Release | : 2006 |
Genre | : Coffee |
ISBN | : 3867279861 |
Author | : Taye Kufa Obso |
Publisher | : Cuvillier Verlag |
Total Pages | : 331 |
Release | : 2006 |
Genre | : |
ISBN | : 386727990X |
Coffea arabica, one of the economically most important crops worldwide, occurs naturally in the undergrowth of montane rainforests of Ethiopia. The study provides the first detailed ecophysiological investigations of wild coffee populations. It demonstrates the inter- and intra-regional variability in phenotypic and hydrological characteristics of wild coffee. The results reveal very different strategies of wild coffee seedlings for coping with drought stress. The ecophysiological diversity shows the importance of Ethiopian wild coffee populations as gene pools for future breeding programs, and underlines the need for an in-situ conservation strategy. The study includes recommendations for coffee forest management and the use of wild arabica coffee in Ethiopia.
Author | : Akmal Akramkhanov |
Publisher | : Cuvillier Verlag |
Total Pages | : 139 |
Release | : 2005 |
Genre | : |
ISBN | : 3865376541 |
Soils of irrigated lands in the Aral Sea Basin are often plagued by high salinity,hampering profitable agriculture on these soils. In this context, the present study has three specific objectives: to identify techniques that enable a rapid estimation of soil salinity, to characterize its spatial distribution and to estimate its spatial distribution based on readily obtainable environmental parametersusing a Neural Network Model Approach. Topsoil salinity was highly variable atshort distances and terrain attributes were the most influential factors. The use of relationships between environmental attributes and soil salinity for upscaling spatial distribution of soil salinity from farm to district level proved to be satisfactory. A possible application is the development of salinity prediction toolsfor farm-level decision making.
Author | : Carlos Javier Puig |
Publisher | : Cuvillier Verlag |
Total Pages | : 181 |
Release | : 2005 |
Genre | : |
ISBN | : 3865376940 |
Author | : Nathaniel Kwamina Howard |
Publisher | : Cuvillier Verlag |
Total Pages | : 175 |
Release | : 2005 |
Genre | : |
ISBN | : 3865376533 |