|
|
|
| Registros recuperados: 479 | |
|
| |
|
| |
|
| |
|
| |
|
|
| CARGNIN, A.; SOUZA, M. A. DE; FOGAÇA, C. M.. |
| O objetivo deste trabalho foi estimar as correlações genotípicas entre caracteres de cultivares de arroz mais utilizados em cultivo, no período de 1950 a 2001. Foram conduzidos dois experimentos de campo nas localidades denominadas Aeroporto e Agronomia, ambas pertencentes à Universidade Federal de Viçosa, em Viçosa, MG. Os ensaios foram conduzidos no delineamento de blocos ao acaso com três repetições. Avaliaram-se 25 cultivares mais plantados no período de 1950 a 2001. Foram coletados e analisados os dados referentes à produção de grãos, a altura das plantas, dias para a floração, estande inicial, estande final, perfilhamento útil, grãos por panícula, percentagem de espiguetas estéreis por panícula e peso do grão. Verificou-se que as correlações... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Arroz; Melhoramento Genético Vegetal; Oryza Sativa.; Agronomic traits; Varieties.; Rice. |
| Ano: 2010 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/891195 |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Lim, Song-Soo. |
| Abolishing a nearly 50-year-old policy for rice price support, Korea adopted a new direct payment program in 2005. Making the transition to decoupled income payments has been governed by the need for operative and effective income safety nets and the WTO disciplines on domestic support. The program aims to deal with over-supply of rice while guarding against the threat of income insecurity. Integrated into a target price mechanism, the fixed and variable payments compensate part of farm income loss arising from adverse market conditions. Besides, the government launched a public stockholding measure to ensure food security. A review of previous studies highlights the fixed payment has no or at most minimal effects on production while the variable payment... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Decoupled payments; Direct payments; Policy reform; Rice; Korea; Agricultural and Food Policy. |
| Ano: 2007 |
URL: http://purl.umn.edu/9755 |
| |
|
| |
|
| |
|
| |
|
|
| Joshi, Ganesh R.; Bauer, Siegfried. |
| Crop genetic resources are the building block of sustainable agricultural development as these can be used to develop crop varieties adaptable to heterogeneous environmental conditions. Nepal is considered the center of origin and diversity for Asian rice, which still has many landraces. However, there has been continuous loss of genetic diversity and concern over it has grown in recent years. The main objective of this paper is to identify the determinants of variety diversity on-farm in the rainfed ecosystem of Nepal by using two-limit Tobit procedure. The diversity on farm appeared to be quite high evaluated based on the number of named varieties grown by the farmers. Majority of the farmers cultivated both modern varieties and landraces simultaneously... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Diversity; Market; Nepal; Rice; Variety; Crop Production/Industries. |
| Ano: 2006 |
URL: http://purl.umn.edu/25422 |
| |
|
| |
|
|
| Harper, Jayson K.; Mjelde, James W.; Rister, M. Edward; Way, Michael O.; Drees, Bastiaan M.. |
| The rice stink bug is a major pest of rice in Texas, causing quality related damage. The previous threshold used for assisting in rice stink bug spray decisions lacked flexibility in economic and production decision variables and neglected the dynamics of the pest population. Using stochastic dynamic programming, flexible economic thresholds for the rice stink bug were generated. The new thresholds offer several advantages over the old, static thresholds, including increased net returns, incorporation of pest dynamics, user flexibility, ease of implementation, and a systematic process for updating. |
| Tipo: Journal Article |
Palavras-chave: Economic thresholds; Dynamic programming; Pest management; Rice; Crop Production/Industries. |
| Ano: 1994 |
URL: http://purl.umn.edu/15411 |
| |
|
| |
|
|
| Dengfeng,WANG; Haijie,HUANG; Huande,FENG; Hua,WANG; Miaojie,HAN; Zhiping,QI. |
| ABSTRACT This research aimed to discover the distribution and the primary influence factors of Cu in the soil-rice systems of tropical farmland. Soil samples of farmland and rice plant (stalk and polished rice) from the western region of Hainan Island were collected and studied. The results showed that the average Cu content in the topsoil of the study area was 15.75 mg kg-1; the highest Cu content (45.92 mg kg-1) was found in the rice fields of the northern area, where pyroclastic parent material is distributed. Thus, there is a potential for Cu contamination of the rice grown in this region. The average contents of Cu in the rice stalks and polished rice were 16.9 and 5.68 mg kg-1, respectively, indicating that the stalks had a larger capacity for Cu... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rice; Copper; Arable land; Hainan. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000200703 |
| |
| Registros recuperados: 479 | |
|
|
|
