Download or read book Effect of Plant Growth Regulators on Growth Yield and Seed Quality in Cowpea Vigna Unguiculata L Walp written by GANAGER TAMMANNA S and published by . This book was released on 1998 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Nano Nutrients on Growth Seed Yield and Quality in Cowpea Vigna Unguiculata L Walp written by Manjunath Gondi and published by . This book was released on 2018 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Plant Geometry and Levels of Phosphorus on Growth Yield Andquality of Cowpea Vigna Unguiculata L Walp Under Dryland Conditions written by Kapoor Singh Yadav and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Growth Regulators on Physiological Aspects of Cowpea written by Heshmat Aldesuquy and published by LAP Lambert Academic Publishing. This book was released on 2014-02-21 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was designed to investigate the effect of seed priming with different concentrations of growth bioregulators (i.e. indole acetic acid, gibberellic acid or kinetin) on growth and metabolism as well as productivity of Vigna sinensis L. Cream 7 plants throughout various stages of plant growth and development. It is clear from this investigation that seed priming with different doses of IAA, GA3 or kinetin improves the growth parameters of cowpea plants by increasing turgidity, stimulating leaf expansion, enhancing the production of photosynthetic pigments as well as the massive increase in photosynthetic activity. Furthermore, these growth bioregulators increased yield capacity of cowpea plants by inducing a massive increase in the pod length, number of pods/plant, number of seeds/pod and seed biomass as well as increases the protein content, total soluble sugars, sucrose and polysaccharide level. Also, it is evident from this study that kinetin application appeared to be the most effective hormone in improving growth and productivity of cowpea plants.
Download or read book Effect of Seed Size Spacing and Chemical Growth Regulators on Seed Production Potential of Forage Cowpea Vigna Unquiculata L Walp written by Hande B K. and published by . This book was released on 1987 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Some Growth Regulating Chemicals on the Seed Yield of Cowpea vigna Unguiculata l Walp written by Kumar Naba and published by . This book was released on 1985 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Sulphur Boron and Zinc on Growth Yield and Nodulation of Cowpea Vigna Unguiculata L Walp written by SEENAPPA C and published by . This book was released on 2001 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 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 written by Severin Polreich and published by Cuvillier Verlag. This book was released on 2011-03-23 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book A Farmer s Primer on Growing Cowpea on Riceland written by R. K. Pandey and published by Int. Rice Res. Inst.. This book was released on 1987 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cowpea crop; The cowpea plant; The seed; Seedling growth; Growth stages; The roots; Root nodules and nitrogen fixing; The shoot - leaves and branches; The shoot - flowers and seed pods; Dry matter production; Growing cowpea; Environment; Water; Choosing the right variety; Tillage and planting; Fertilizer and lime; Harvesting and storage; Increasing yields and profits; Yield components; Production factors; Yield reducers - weeds; Yield reducers - insect pests; Yield reducers - diseases; Cowpea in other cropping systems; Sequence cropping; Intercropping; Strip-cropping.
Download or read book Growth Development and Yield of Cowpeas Vigna Unguiculata L Walp in Response to Spacing Nitrogen and Plant Growth Retardants written by Amadou Tijan Jallow and published by . This book was released on 1985 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Phosphorus and Zinc on Growth Seed Yield and Seed Quality in Cowpea Vigna Unguiculata L With CD Copy written by Kiran Sagwal and published by . This book was released on 2016 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Seed Size Germination Successive Plant Growth Yield and Yield Attributing Characters of Cowpea Vigna Unguiculata L written by P. N. Rai and published by . This book was released on 1984 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Integrating Leaf and Seed Production Strategies for Cowpea Vigna Unguiculata L Walp written by Robert Patrick Barrett and published by . This book was released on 1987 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Soil Moisture Regimes and Nitrogen Levels on Growth Yield Quality and Water Use Efficiency of Maize cowpea Zea Mays L Vigna Unguiculata L Walp and Bajra cowpea Pennisetum Americanum L Schum Vigna Unguiculata L Walp Forages written by Dilbagh Singh Rana and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Developing Screening Tools for Abiotic Stresses Using Cowpea Vigna Unguiculata L Walp as a Model Crop written by Shardendu Kumar Singh and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abiotic stresses cause extensive loss to agriculture production worldwide. Cowpea is an important legume crop grown widely in tropical and subtropical regions where high temperature, ultraviolet-B (UVB) radiation and drought are the common stress factors limiting production. Various vegetative, physiological, biochemical and reproductive plant attributes were assessed under a range of UVB radiation levels in Experiment I and in a combination with two doses of each carbon dioxide concentration [CO2], temperature, and UVB radiation and their interactions in Experiment II by using six cowpea genotypes and sunlit plant growth chambers. The dynamics of photosynthesis and fluorescence processes were assessed in 15 cowpea genotypes under drought condition in Experiment III in pot-grown plants under sunlit conditions. A distinct response pattern was not observed in cowpea in response to UVB radiation from 0 to 15 kJ; however, plants grown under elevated UVB showed reduced photosynthesis resulting in shorter plants and produced smaller flowers and lower seed yield. Increased phenolic compounds appeared to be a defense response to UVB radiation. The growth enhancements observed by doubling of [CO2] were not observed when plants were grown in combination with elevated UVB or temperature which also showed the most detrimental effects on plant growth and seed yield. Results from Experiment I and II revealed that cowpea reproductive traits were highly sensitive to abiotic stresses compared to the vegetative growth and development. A total stress response index (TSRI) technique, derived from all vegetative and reproductive parameters, was used to screen genotypes for their stress tolerance to UVB or combination of stresses. An increase in water use efficiency while maintaining higher rate of photosynthesis was an important drought tolerance mechanism in tolerant cowpea genotypes. Using principal component analysis technique, four groups of the genotypes were identified for their drought tolerance. Evaluating same genotypes across stress conditions revealed that no single genotype has the absolute tolerance characters to all stress conditions. The identified diversity for abiotic stress tolerance among cowpea genotypes and associated traits can be used to develop tolerant genotypes suitable for an agro-ecological niche though traditional breeding or genetic engineering methods.
Download or read book Relationship Between Seed Density and Quality of Cowpea Vigna Unguiculata L Walp Seeds written by Edson Herculano Neves Vieira and published by . This book was released on 1991 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Field and laboratory experiments were conducted to evaluate the relationship between seed specific gravity, and/or seed density, to the phydiological quality, storability and seedling performance of cowpea seeds. Two methods of seed separation were used: a) separation using aqueous sucrose and b) using a table model fractionating aspirator. Seeds of different specific gravity separated by sucrose solution were compares using a standard germination test at 20-30oC and accelerated aging tests at temperatures of 40oC, 42oC, and 45oC for 48 and 72 hours. Germination responses indicated that low specific gravity seeds perform poorly when compared to high specific seeds and to the unseparated sample. However, seed vigor responses expressed by the accelerated tests results revealed significantly higher vigor for the unseparated sample than for any of the specific gravity classes, suggesting that the use of aqueous solutions for cowpea seed separation may have a detrimental effect on seed quality possibly due to water absorption during separation. Field emergence results in 1988 were not significantly different among specific gravity categories. In 1990, field emergence responses were similar to results obtained in the accelerated aging tests. The unseparated seeds were superior to the seeds which were separated using solutions. However, differences in yield in both 1988 and 1990 planting seasons were not related to seed specific gravity. The evaluation of the relationship between seed density expressed by 100 seed weight and storability of cowpea seeds was determined different density fractions obtained using a fractionating aspirator. Evaluations were conducted prior to storage and after 6, 9 and 12 months of open storage using the standard germination test, first count germination, accelerated aging test, and germination performance at low temperature. Vigor was also evaluated by comparing seedling elongation characteristics. No significant differents were observed in germination percentage for all categories prior to storage. However, tests conducted after each storage period revealed significantly higher germination for the high density seeds as well as for the unseparated control.
Download or read book Effect of Calcium And Sulphur on the Growth and Yield of Cowpea vigna Unguiculata L Walp and Sunflower helianthus Annus L in the Acid of Bangalore written by Puttaswamy. H. and published by . This book was released on 1984 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt:
