Author: Dalu Ram Sharma
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Response of Cowpea (Vigna Unguiculata (L.) Walp) to Nitrogenous, Phosphatic and Bacterial Fertilizers in Aridisols on Dryland
Author: Dalu Ram Sharma
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Fertilizer Responses in Cowpea (Vigna Unguiculata (L) Walp)
Author: McKinley Posely
Publisher:
ISBN:
Category : Cowpea
Languages : en
Pages : 146
Book Description
Publisher:
ISBN:
Category : Cowpea
Languages : en
Pages : 146
Book Description
Response of Cowpea (Vigna Unguiculata L.) (walp) Genotypes to Varied Levels of Fertilizers and Spacing on Growth and Yield
Author: NARASIMHAPPA K
Publisher:
ISBN:
Category :
Languages : en
Pages : 118
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 118
Book Description
Response of Cowpea (Vigna Unguiculata (L.) Walp) to Sources of Phosphorus and Zinc Levels
Author: PREM KUMAR C
Publisher:
ISBN:
Category :
Languages : en
Pages : 112
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 112
Book Description
Growth, Development and Yield of Cowpeas (Vigna Unguiculata (L.) Walp) in Response to Spacing, Nitrogen and Plant Growth Retardants
Author: Amadou Tijan Jallow
Publisher:
ISBN:
Category : Cowpea
Languages : en
Pages : 448
Book Description
Publisher:
ISBN:
Category : Cowpea
Languages : en
Pages : 448
Book Description
Response of Cowpea (Vigna Unguiculata (L.)Walp) to Different Sources and Levels of Phosphorus with P-solubilizer
Author: SUNIL C
Publisher:
ISBN:
Category :
Languages : en
Pages : 98
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 98
Book Description
Response of cowpea (Vigna unguiculata (L) Walp) varities to phosphorus application, April 2005
Author: Keakile K. Keneilwe
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Stomatal and Leaf Water Status Responses of Cowpea (Vigna Unguiculata (L.) Walp.) to Environmental Drought
Author: Loretta May Bates
Publisher:
ISBN:
Category : Cowpea
Languages : en
Pages : 162
Book Description
Publisher:
ISBN:
Category : Cowpea
Languages : en
Pages : 162
Book Description
Yield and Growth Responses of Cowpea (Vigna Unguiculata (L.) Walp.) Genotypes to Fertilization
Author: Samuel Avendan̄o Laguna
Publisher:
ISBN:
Category : Cowpea
Languages : en
Pages : 80
Book Description
Publisher:
ISBN:
Category : Cowpea
Languages : en
Pages : 80
Book Description
Evaluation of Cowpea (Vigna Unguiculata L. Walp) Genotypes for Adaptation to Low Soil-phosphorus Conditions and to Rock Phosphate Application
Author: Sabiou Mahamane
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Cowpea (Vigna ungiculata L. Walp) is a major food and fodder legume in poor countries, particularly Sub-Saharan Africa countries. It is generally produced in sandy, acid soils, deficient in phosphorus (P) which severely limits its production. Because processed phosphate fertilizers are expensive and poorly available to farmers, rock phosphate is viewed as a cheap alternative phosphate source. The present study evaluated 696 U.S Core Collection and IITA cowpea accessions for adaptation to low soil P environments and for response to rock phosphate application. Subsequently, organic acid exudation by selected cowpea genotypes as a mechanism for P acquisition from Fe-oxide and Ca bound P was investigated. A low P soil from Nacogdoches pine forest was used to grow plants. There were two P treatments: 0 and 300 mg P/kg of soil as Tahoua (Niger) rock phosphate. At harvest, plant height, shoot and root dry weights were determined and total biomass and shoot-to-root ratios were computed. Shoot P contents of 100 selected accessions were measured. Sixteen accessions reflecting the wide array of responses observed were selected for the organic acid study. Plants were grown in a growth chamber hydroponically with no P and +P nutrient solutions for 3 weeks. Organic acids were collected in a CaCl2-KCl solution. The nature and quantity of the collected organic acids was determined. Cowpea accessions were significantly different in their ability to adapt to Pdeficiency stress and to acquire P from rock phosphate. The parameters most effective in separating the accessions were shoot mass and total biomass. This data will be potentially useful in the selection of cowpea germplasm for (1) adaptation to West African soils of low P fertility, and (2) ability to utilize P from poorly soluble rock phosphate. The predominant organic acid exuded by cowpea roots was a tricarboxylic acid not yet identified. There was surprisingly more exudation of this acid under +P than under -P conditions. Exudation was more highly correlated to roots than to shoots.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Cowpea (Vigna ungiculata L. Walp) is a major food and fodder legume in poor countries, particularly Sub-Saharan Africa countries. It is generally produced in sandy, acid soils, deficient in phosphorus (P) which severely limits its production. Because processed phosphate fertilizers are expensive and poorly available to farmers, rock phosphate is viewed as a cheap alternative phosphate source. The present study evaluated 696 U.S Core Collection and IITA cowpea accessions for adaptation to low soil P environments and for response to rock phosphate application. Subsequently, organic acid exudation by selected cowpea genotypes as a mechanism for P acquisition from Fe-oxide and Ca bound P was investigated. A low P soil from Nacogdoches pine forest was used to grow plants. There were two P treatments: 0 and 300 mg P/kg of soil as Tahoua (Niger) rock phosphate. At harvest, plant height, shoot and root dry weights were determined and total biomass and shoot-to-root ratios were computed. Shoot P contents of 100 selected accessions were measured. Sixteen accessions reflecting the wide array of responses observed were selected for the organic acid study. Plants were grown in a growth chamber hydroponically with no P and +P nutrient solutions for 3 weeks. Organic acids were collected in a CaCl2-KCl solution. The nature and quantity of the collected organic acids was determined. Cowpea accessions were significantly different in their ability to adapt to Pdeficiency stress and to acquire P from rock phosphate. The parameters most effective in separating the accessions were shoot mass and total biomass. This data will be potentially useful in the selection of cowpea germplasm for (1) adaptation to West African soils of low P fertility, and (2) ability to utilize P from poorly soluble rock phosphate. The predominant organic acid exuded by cowpea roots was a tricarboxylic acid not yet identified. There was surprisingly more exudation of this acid under +P than under -P conditions. Exudation was more highly correlated to roots than to shoots.