Consulta: subjectFacets:"Water efficiency"
Registros recuperados: 3
Data/hora: 27/07/2024 08:21:44

Combining ability of physiological traits in forrage maize
Provedor de dados: 64
Autores: Redivo,Greice Daiane Rodrigues Gomes; Faria,Marcos Ventura; Rosa,Jocimar Costa; Ono,Elizabeth Orika; Rodrigues,João Domingos; Adriano,Elisa.
ABSTRACT The exploitation of the existing genetic variability for the physiological traits related to the yield and quality of maize forage can assist in the development of superior inbred lines and hybrids. The objective of this work was to evaluate the general and the specific combining ability and the nature of gene effects of physiological and chemical traits of forage maize genotypes. Two groups of genotypes and 16 hybrids resulting from a 4x4 partial diallel scheme were evaluated. Group I consisted of two commercial hybrids (AG8025, P30B39) and two elite inbred lines (LEM2 and LEM3). Group II consisted of four experimental inbred lines originated from different populations of forage maize breeding program. In total, 24 treatments were evaluated,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: CO2 assimilation; Stomatal conductance; Internal CO2 concentration; Water efficiency; Gaseous exchanges.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100246

Investigations on the Impacts of China's Rural Water Policies: From Efficiency and Equity Perspectives
Provedor de dados: 31
Autores: Fang,   Lan.
China’s water resources are scarce. Given its limited water resource, policies in China have been traditionally focused on meeting sectoral demands for water by increasing the supply rather than managing demand. However, effective water resource policies that focus on demand management and encourage efficient water use remain the main weakness of China’s water policy. Main potential for efficiency gain is the agricultural sector, which accounts for 65 percent of the nation’s total water withdrawals. Due to major inefficiencies in irrigation water systems only about 45 percent of water withdrawals for agriculture are actually used by farmers to irrigate their crops. In addition to inefficiencies, the equity of the agricultural water policies is...
Tipo: Conference Paper or Presentation
Palavras-chave: Water efficiency; Equity; China’s rural water management; Environmental Economics and Policy.
Ano: 2011
URL: http://purl.umn.edu/103486

Measuring irrigation water use efficiency using stochastic production frontier: An application on citrus producing farms in Tunisia
Provedor de dados: 31
Autores: Dhehibi,   Boubaker; Lachaal,   Lassaad; Elloumi,   Mohamed; Messaoud,   Emna B.
This paper proposes an alternative measure of irrigation water efficiency based on the concept of input-specific technical efficiency. It uses a stochastic production frontier approach, based on Battese and Coelli’s (1995) inefficiency effect model, to obtain farm-specific estimates of technical and irrigation water efficiency, and a second-stage regression approach to identify the factors that influence irrigation water efficiency differentials. This methodology was applied to a sample of 144 citrus farms in Nabeul, Tunisia. Technical efficiency varies widely, suggesting that these citrus farmers could increase their production by as much 33% by using inputs more efficiently. Mean irrigation water efficiency is similarly variable, and on average below...
Tipo: Journal Article
Palavras-chave: Water efficiency; Stochastic frontier production function; Citrus farms; Tunisia; Resource /Energy Economics and Policy.
Ano: 2007
URL: http://purl.umn.edu/57013