Evaluation Of Selected Rice Varieties For Upland Rainfed Production In The Lowlands Of Papua New Guinea
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Evaluation Of Selected Rice Varieties For Upland Rainfed Production In The Lowlands Of Papua New Guinea
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Author :
language : en
Publisher:
Release Date : 2005
Evaluation Of Selected Rice Varieties For Upland Rainfed Production In The Lowlands Of Papua New Guinea written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Rice categories.
Major Research In Upland Rice
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Author : International Rice Research Institute
language : en
Publisher: Int. Rice Res. Inst.
Release Date : 1975
Major Research In Upland Rice written by International Rice Research Institute and has been published by Int. Rice Res. Inst. this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Rice categories.
Upland rice around the world. Climate of upland rice regions. Soils on which upland rice is grown. Growth-limiting factors of aerobic soils. Factors that limit the growth and yields of upland rice. Varietal diversity and morpho-agronomic characteristics of upland rice. Agronomic traits needed in upland rice varieties. Drought tolerance in upland rice. Control of upland rice insects though varietal resistance. Diseases of upland rice and their control though varietal resistance. Varietal resistance to adverse chemical environments of upland rice soils. Breeding methods for upland rice. Cultural practices for upland rice. Studies on insect pests of upland rice. Pesticide residue in upland rice soil. Mineral microbial transformations in upland rice soil.Future emphasis on upland rice.
Guide To Participatory Varietal Selection For Submergence Tolerant Rice
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Author : T. R. Paris
language : en
Publisher: IRRI
Release Date : 2011
Guide To Participatory Varietal Selection For Submergence Tolerant Rice written by T. R. Paris and has been published by IRRI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Agricultural development projects categories.
The Green Revolution averted the threat of famine through the rapid adoption of improved rice varieties. However, despite this huge success, hundreds of millions of poor rice-farming families in rainfed areas still live in poverty and suffer from food (rice) insecurity. Despite many released improved rice varieties for rainfed conditions, farmers still use local varieties that can withstand drought and floods but have low yields or they use the same varieties for many years because of a lack of better varieties. Rainfed rice farmers are slow to adopt improved varieties because of several problems. One problem is more of extension than breeding - many farmers, particularly those living in remote rainfed areas, may not have access to or information about the seed of new varieties. Another problem is that variety testing programs are often conducted on-station, which does not represent farmers' fields. Moreover, conventional rice breeding programs usually seek farmers' input only at the very end of the process, when newly released varieties, usually one or two per year, are evaluated in on-farm demonstration trials. Often, in remote and unfavorable areas, subsistence farmers, who comprise the majority of the rural farming population in Asia, give importance to social and cultural dimensions aside from the agronomic performance of the new rice varieties. The complexities of developing acceptable varieties for variable and stressful rainfed environments require that breeders become deeply familiar with men and women farmers' needs and preferences. Since 1977, IRRI has been making efforts to improve communication among farmers, breeders, and extension workers so that men and women farmers' concerns and preferences are considered in plant breeding objectives. Participatory varietal selection (PVS) is a simple way for breeders and agronomists to learn which varieties perform well on-station and on-farm and to obtain feedback from the potential end users in the early phases of the breeding cycle. It is a means for social scientists to identify the varieties that most men and women farmers prefer, including the reasons for their preference and constraints to adoption. Based on IRRI's experience in collaboration with national agricultural research and extension system partners and farmers, PVS, which includes "researcher-managed" and "farmer-managed" trials, is an effective strategy for accelerating the dissemination of stress-tolerant varieties. PVS has also been instrumental in the fast release of stress-tolerant varieties through the formal varietal release system. This guide on PVS will complement the various training programs given by IRRI for plant breeders, agronomists, and extension workers engaged in rice varietal development and dissemination.
Upland Rice
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Author : Phool Chand Gupta
language : en
Publisher: Int. Rice Res. Inst.
Release Date : 1986
Upland Rice written by Phool Chand Gupta and has been published by Int. Rice Res. Inst. this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Upland rice categories.
Upland rice distribution; Climate; Landscape and soils; Cropping systems; Varietal improvement; Soil management; Land preparation and crop establishment; Farm equipment; Weed management; Disease management; Insect pest management; Economics of upland rice production.
Genetic Evaluation Of Rainfed Upland Rice Oryza Sativa L Germplasm For Paranodulation
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Author : KALAGUDI GIRISH M
language : en
Publisher:
Release Date : 1997
Genetic Evaluation Of Rainfed Upland Rice Oryza Sativa L Germplasm For Paranodulation written by KALAGUDI GIRISH M and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Physico Chemical And Eating Qualities Of Selected Rice Varieties In Papua New Guinea
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Author : Joel G. Waramboi
language : en
Publisher:
Release Date : 2006
Physico Chemical And Eating Qualities Of Selected Rice Varieties In Papua New Guinea written by Joel G. Waramboi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Rice categories.
Rainfed Lowland Rice
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Author : International Rice Research Institute
language : en
Publisher: IRRI
Release Date : 1979
Rainfed Lowland Rice written by International Rice Research Institute and has been published by IRRI this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Crops and climate categories.
General; Rainfed lowland rice in selected countries; Varietal improvement; Crop management; Cropping patterns involving rainfed rice; Socioeconomic aspects; Strategies for future research; International collaboration.
Farmers Evaluation And Determinants Of Adoption Of Upland Rice
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Author : Yemane Asmelash
language : en
Publisher:
Release Date : 2011-11
Farmers Evaluation And Determinants Of Adoption Of Upland Rice written by Yemane Asmelash and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-11 with categories.
Irrigated And Rain Fed Lowland Rice Breeding In Uganda
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Author : Jimmy Lamo
language : en
Publisher:
Release Date : 2022
Irrigated And Rain Fed Lowland Rice Breeding In Uganda written by Jimmy Lamo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with Electronic books categories.
Since introduction of rice into Uganda in 1904, improvement of the irrigated and rain-fed lowland types was undertaken to address a number of production and quality constraints in three consecutive and overlapping phases. The initial phase was achieved through evaluation of introduction, selection of promising lines and subsequent release of the selected lines for production by the farmers. In the second phase, genetic potential of traits and characteristics of interest were analyzed and used to guide selection of suitable parents for hybridization and the third phase employed genotyping approach in screening and selection of the parental lines and the segregating populations to enhance the breeding efficiency for the traits of importance. Simultaneously, the key production constraints addressed included resistance to rice yellow mottle virus (RYMV), rice blast, bacterial leaf blight and narrow leaf spot diseases as well as submergence tolerance and cold tolerance. The quality traits considered for the improvement alongside the grain yield parameters were the grain aroma, amylose content, shape and size. These interventions have resulted into release and wide adoption of seven rice varieties in Uganda besides several breeding lines which have informally diffused into different major rice production agro-ecology. Subsequently, it can be concluded that a substantially strong and functional breeding platform for rice in Uganda has been established.
Agrindex
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Author :
language : en
Publisher:
Release Date : 1994
Agrindex written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Agriculture categories.