Vegetable Cowpea

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Cowpea In India

Author : D. Kumar
ISBN : 9789387741539
Genre : Science
File Size : 82.65 MB
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Cowpea an important food legume, is adapted to wide ranges of soil and rainfall situations, hence, cultivated in tropical and sub-tropical regions of the world. It is the crop of low and high rainfall regions, grown particularly as a mixed/inter crop for various-purposes. Cowpea is an ancient source of food, forage, fodder, vegetable, certain snacks, cover crop and an important component of cropping system. The crop has been investigated for its varied aspects to make it more productive, useful, sustenance, source of organic food and the crop of common masses. The information so generated is scattered, unsystematic and not readily available at a place. It is desired that research results of various aspects generated in India are collected, compiled and systematically arranged so as to draw viable and valuable conclusion by the intended users and planners. In view of this, present compilation "Cowpea in India" represents a treasure of scientific information by reputed researchers throughout the country. The compilation comprises fourteen chapters devoted to plant improvement, crop husbandry, resistance towards abiotic stresses, genetic resources of quantitative and qualitative nature, plant protection, soil nematodes, forage aspects, uses, vegetable purposes etc. The book it is hoped would be of great use and help to those concerned with all over cowpea advancement and development in one way or other.
Category: Science

Assessing Successive Leaf Yield Performance Of Dual Purpose Cowpea Vigna Unguiculata To Decrease Seasonal Shortage Of Nutrients In Resource Poor Small Scale Households Of Tanzania And Uganda

Author :
ISBN : 9783736937000
Genre : Science
File Size : 88.36 MB
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This study presents a method to assess yield performance of dual-purpose cowpea types for human consumption and to reveal potentials for further improvement of its use as leafy vegetable. Eleven cowpea accessions with different genetic background and sample status were chosen from AVRDC’s working collection in Arusha, Tanzania. Among them, dual-purpose cowpeas like Dakawa, Ex Iseke and Ngoji were present that the center has been distributing to local farmers. Multi-location trials in typical cowpea production environments were established both on farm and on station in the regions Arusha, Dodoma, and Kilimanjaro in Tanzania and in Eastern Region, Uganda during the short and long rainy season 2007 and 2008, respectively. Young, tender leaves were picked in successive leaf harvests about every and two weeks until the plants did not produce further leaves. Cowpea seeds were harvested when pods reached 80% maturity. Data of yield parameters were analyzed with analysis of variance (ANOVA), stability analyses were carried out according to the dynamic and static concepts. Reliability of leaf and seed yield performances were calculated based on the probability of outperformance of local check cowpeas that were previously recommended by farmers and extension workers in informal group sessions. Through NIRS, crude protein and iron contents were assessed in leaves obtained from the second leaf harvests at the different locations and from up to subsequent leaf harvests. Dual-purpose utility for smallholders was assessed through (i) an index of superiority (Si), in which reliabilities of leaf yield across repeated leaf harvests and seed yield were weighed and combined to overall yield benefit of the ith accession, (ii) effective plot length for nutritional component XY, to calculate the length of a plot (in m) that needs to be planted to sustain a five-head household for ten days with a recommended amount of nutrients, and (iii) responsiveness (Resp), reflecting changes of leaf yield (compensation) relative to changes in seed yield (sensitiveness) if harvesting frequency was intensified. Performance of single leaf yields was strongly influenced by environmental factors and, only in Arusha, accession-specific. Interactions between yield reliability and stability were site-specific. Overall, test-accessions achieved higher reliabilities in seed yield than in leaf yield. Only in the on-station trial in Eastern Region, accession IT82D-889, and in the on-farm trial in Kilimanjaro, ILRI11114 and Ex Iseke showed leaf yield reliabilities above 0.50. Iron content in cowpea leaves was highly dependent on environmental influences and varied from 157.4 mg kg-1 to 286.1 mg kg-1. Leaf CP had a broad-sense heritability of 0.87. Across accessions and environments the mean leaf CP content ranged from 37.4% of DM (IT93K-2045-29) to 33.9% of DM (Sudan). CP and leaf dry matter (DM) yield had significantly negative correlation coefficients between. Means of effective plot length for crude protein and iron varied by more than 50% across environments. Although CP, in contrast to iron, was genetically determined, its impact on differences in effective plot length was negligible as well, as differences in production of leaf DM per m2 were by far larger among accessions than those of CP contents. It was recommended to favor accessions with short effective plot lengths and higher CP contents in leaf yields over those with short effective plot lengths and low CP contents. In contrast to determinate cowpeas, indeterminate types increased their DM gain in aerial plant parts of leaf-harvested plants relatively to unharvested plants. Indeterminate cowpeas responded with high leaf yield increases if leaves were picked twice a week. Consequently yields of total edible DM of these plant types, comprising added seed and leaf yields, increased with intensification of leaf-harvesting frequency from once to twice a week. Determinate plant types yielded highest in total edible DM when only seed was harvested or in less intensive leaf-harvesting scenarios. Accessions with favorable responsiveness, reflecting leaf yield changes relative to seed yield changes under intensified leaf-harvesting frequency, were Sudan, ILRI11114, and IT93K2045-29. In contrast, Resps of SAM45 and ILRI15742 were poorest. Traits have to be identified that could explicitly improve Resp of cowpea types. Improving quantitative yield parameters should not result in quality decrease. The dual-purpose characteristics of local checks were mainly superior to the eleven test-accessions pointing to a demand on improved leaf yield performance that is not merely total leaf yield amount but also the continuance during repeated leaf harvesting. By the proposed method the status quo of a defined location, i.e. site-specific demands on germplasm, can be included in the analysis, serving as benchmark for improvement if the local check is chosen carefully. Since single leaf yields are the results of fairly complex and dynamic interactions between plant physiological processes and environmental conditions it is essential to conduct participatory variety selection and plant breeding trials for dual-purpose assessments in target environments and not ex situ.
Category: Science

African Indigenous Vegetables In Urban Agriculture

Author : Charles Michael Shackleton
ISBN : 9781844077151
Genre : Technology & Engineering
File Size : 67.42 MB
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This book provides a comprehensive synthesis of current knowledge of the potential and challenges associated with the multiple roles, use, management and livelihood contributions of indigenous vegetables in urban agriculture in sub-Saharan Africa. There has been growing research and policy effort around urban agriculture in the region over the last two decades, but never has it been integrated with work on under-researched crops such as indigenous vegetables. These species have multiple advantages, including low input requirements, adaptability to African environments, high nutritional value and marked biodiversity, cultural and local food security significance. Yet they are overlooked in the modern world, where recent emphasis has been directed to growing a limited range of exotic crops, both for internal markets and for export to developed country markets. This book provides evidence that, in spite of this neglect, in many African cities indigenous vegetables are still widely used, cultivated and marketed. It goes on to consider their potential to contribute to income generation and poverty alleviation of the growing numbers of urban dwellers in sub-Saharan Africa, whilst promoting urban greening and sustainability. Based on critical analysis of the debates it presents a multidisciplinary analysis of the realities and future opportunities.
Category: Technology & Engineering

Advances In Cowpea Research

Author : B. B. Singh
ISBN : 978131110X
Genre : Cowpea
File Size : 75.66 MB
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Cowpea: taxonomy, genetics, and breeding, physiology and agronomy, diseases and parasitic weeds, insect pests, postharvest technology and utilization. Biotechnological applications.
Category: Cowpea

Genetic Improvement Of Vegetable Crops

Author : G. Kalloo
ISBN : 9780080984667
Genre : Gardening
File Size : 54.10 MB
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Genetic improvement has played a vital role in enhancing the yield potential of vegetable crops. There are numerous vegetable crops grown worldwide and variable degrees of research on genetics, breeding and biotechnology have been conducted on these crops. This book brings together the results of such research on crops grouped as alliums, crucifers, cucurbits, leaf crops, tropical underground and miscellaneous. Written by eminent specialists, each chapter concentrates on one crop and covers cytology, genetics, breeding objectives, germplasm resources, reproductive biology, selection breeding methods, heterosis and hybrid seed production, quality and processing attributes and technology. This unique collection will be of great value to students, scientists and vegetable breeders as it provides a reference guide on genetics, breeding and biotechnology of a wide range of vegetable crops.
Category: Gardening

State Of The World 2011

Author : The Worldwatch Institute
ISBN : 9781610916288
Genre : Nature
File Size : 71.29 MB
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A compelling look at the global food crisis, with particular emphasis on global innovations that can help solve a worldwide problem. State of the World 2011 not only introduces us to the latest agro-ecological innovations and their global applicability but also gives broader insights into issues including poverty, international politics, and even gender equity.
Category: Nature

Genetic Resources Chromosome Engineering And Crop Improvement

Author : Ram J. Singh
ISBN : 0203489284
Genre : Science
File Size : 57.14 MB
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The first book in this new series discusses grain legumes, which rank only second to cereals in supplying calories and protein to the world's population. With each chapter written by an internationally renowned scientist, the book reviews the role of alien germplasm for the domestication of each major legume crop. Discussion for each crop covers or
Category: Science

Vegetable Crops

Author : T. R. Gopalakrishnan
ISBN : 8189422413
Genre : Science
File Size : 58.61 MB
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With reference to India.
Category: Science

Journal Of Root Crops

Author :
ISBN : CORNELL:31924101594061
Genre : Root crops
File Size : 62.12 MB
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Category: Root crops