Download or read book Evaluation of Cowpea Vigna Unguiculata L Walp Genotypes for Nitrogen Fixation Under the Influence of Rhizobium Mycorrhiza and Phosphorus written by M. A. Mercy and published by . This book was released on 1988 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Influence of Vesicular arbuscular Mycorrhizal Fungi on Nitrogen Fixation and Phosphorus Uptake in High and Low Nitrogen Fixing Genotypes of Cowpea Vigna Unguiculata L Walp written by Sriyani Rajapakse and published by . This book was released on 1983 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Phosphorus on Nitrogen Fixation in Three Genotypes of Cowpea Vigna Unguiculata L Walp written by Emmanuel Hugues Prophète and published by . This book was released on 1984 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Cowpea Vigna Unguiculata L Walp Genotypes for Adaptation to Low Soil phosphorus Conditions and to Rock Phosphate Application written by Sabiou Mahamane and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Influence of Genotype on Drought Resistance and Nitrogen Fixation in Cowpea Vigna Unguiculata L Walp written by David Wayne Walker and published by . This book was released on 1983 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mycorrhizal Influences on Cowpea Vigna Unguiculata L Walp Under Different Levels of Soil Phosphorus and Drought written by Rommel Mesquita De Faria and published by . This book was released on 1984 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Early and Late Nitrogen Fertilization and the Yields and Biological Nitrogen Fixation of Cowpeas Vigna Unguiculata L Walp Under Well watered Conditions and Drought written by Hassan Osman Ahmed Elowad and published by . This book was released on 1984 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Genetics and Heritability of Quantitative Differences in N2 Fixation in Cowpea Vigna Unguiculata L Walp written by Keith Wilfred Zary and published by . This book was released on 1980 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Symbiotic Nitrogen Fixation and the Levels of Ureides in Cowpea Vigna Unguiculata L Walp written by ANAND K. N and published by . This book was released on 1998 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Germplasm Evaluation of Botswana Cowpea Vigna Unguiculata L Walp Landraces written by Barbara E. DeMooy and published by . This book was released on 1985 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effects of Zinc Nutrition on Nodulation and Nitrogen Fixation Processes of Cowpea Vigna Unguiculata L Walp written by Dyremple Barrington Marsh and published by . This book was released on 1983 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Influence of Seedcoat Colour on Symbiotic Performance and Molecular Diversity of Rhizobia Nodulating Cowpea Vigna Unguiculata L Walp and Bambara Groundnut Vigna Subterranea L Verdc Genotypes written by and published by . This book was released on 2015 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil nutrient deficit, especially nitrogen (N), is the major factor causing yield gaps in Sub-Saharan Africa. The legume-Rhizobium symbiosis is one of the most important plant-microbe interactions in sustainable agriculture due to its ability to provide much needed N to cropping systems. The aim of this research was to identify cowpea and Bambara groundnut genotypes with enhanced productivity and symbiotic N nutrition within different environments using the seedcoat colour as marker.

Download or read book The Genetics and Heritability of Quantitative Differences in Nitrogen Fixation in Cowpea Vigna Unguiculata L Walp written by and published by . This book was released on 1980 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cowpea Vigna unguiculata L Walp abstracts of world literature Vol V 1983 1985 written by and published by IITA. This book was released on with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Influence of Virus Infection on Crop Productivity and Nitrogen Fixation in Cowpea Vigna Unguiculata L Walp written by Stephen Karl O'Hair and published by . This book was released on 1979 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Response of Cowpea Vigna Unguiculata L walp Genotypes to Varied Levels of Fertilizers and Spacing on Growth and Yield written by NARASIMHAPPA K and published by . This book was released on 1999 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Cowpea Vigna Unguiculata L Genotypes for Growth Yield and Protein Content for Vegetable Purpose written by S.N. Darshan and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: