New user registration
Event organizer registration
Login via your institution account
Login via your organization account
Login via your publisher account
Login using your new user credentials
Forgot username or password?
Subscribe to SciArchives
Agricultural and Biological Sciences >
Agronomy and Crop Science
Advance Research Journal of Crop Improvement
Publisher:Dr. R. K. Singh
Editor in chief:Dr. S. B. Singh
Your selection(s) could not be saved due to an internal error. Please try again.
Browse by Volumes
Weed Menace And Nature Of Weed-Crop Competition In Perspective Of Bihar
Volume: 7 | Issue no: 2-2016 | Pagination: 245-250
Of the more than 300,000 species of plants known in the world, hardly 3,000 are of economic value to us. When one grows any of these economic species of plants, invariably, a variety of volunteer vegetation comes up simultaneously which is competitive and undesirable. This results into competition that is defined as the action of endeavoring to gain what another endeavors to gain at the same time. Among plant communities each plant is in a state of continuous competition with its neighboring plants for various growth elements, both above and under the ground. Volumes of research into the primary elements of weed-crop competition have drawn our concern to mineral nutrients, moisture and light. Weed-crop competition for ground space is not usually upheld by the modern researchers.
Response Of Maize Hybrids From Heterotrophic To Autotrophic Phase Of Development In Cold Conditions
Author:Nirupma Singh And Ambika Rajendran1
Volume: 7 | Issue no: 2-2016 | Pagination: 240-244
Maize (Zea mays L.) is a crop of a tropical region with sensitivity to low temperature. This study was conducted to evaluate the performance of experimental maize hybrids in winter months of northern India in field conditions. Data were recorded for survival rate, leaf length and width, seedling height and leaf colour. The analysis of pooled data from 3- leaf stage to 6-leaf stage showed hybrids131023 x 131026 and NS76B x EL-CML-1 as best performers. Hybrids with relatively high leaf appearance rate, less cold injury symptoms showed good level of cold tolerance in terms early seedling growth under cold stress. These secondary traits could be used in selection index for improvement of tropical maize for low temperature adaptation.
Effect Of Foliar Application Of Plant Growth Regulators On Growth And Yield Of Potato Seed Tubers Propagated From Micro Plantlets On Soilless Solid Media In Greenhouse
Author:Ravindra Awati1, Anjanabha Bhattacharya And Bharat Char1
Volume: 7 | Issue no: 2-2016 | Pagination: 234-239
In the present study, effect of foliar application of plant growth regulators on growth and yield of potato seed tubers cv. KUFRI CHIPSONA 3, grown from micro plantlets, on soil-less solid media in greenhouse conditions, were evaluated. Out of seven treatments studied, six included plant growth regulators, of which, two were plant growth enhancers (GA3, NAA), four were plant growth retardants (Paclobutrazaol, Triacontanol, Ethrel and Chlormequat chloride- CCC) and one control (water spray). Treatments were designated, namely, T0 control (water spray), T1 GA3 (0.0036 ppm), T2 paclobutrazaol (100 ppm), T3 triacontanol (0.5 ppm), T4 NAA (100 ppm), T5 ethrel (250 ppm) and T6 CCC (500 ppm) as foliar application on 30 DAP (days after planting) old crop plants. Results indicate that the treatment with T5 ethrel (250 ppm) was significantly effective in altering crop phenotype, chiefly, in terms of plant growth parameters like crop height (dwarf phenotype, 61.1cm vs. control, 110.2cm), main shoot diameter (5.8cm vs. 4.2cm), number of tuber per plant (3.4 vs. 2.6) and total yield of tuber [g per block] (534.6g vs. 246g in controls) in comparison to T0 control-water spray. Application of Ethrel (250 ppm) at 30 DAP is recommended on micro plantlets generated crop plants, grown in soil-less solid media cultivation in green house condition, for increased yield of potato seed tubers.
Triple Test Cross Analysis For Yield And Yield Traits In Tomato (Lycopersicon Esculentum Miller)
Volume: 7 | Issue no: 2-2016 | Pagination: 231-233
The modified triple test-cross analysis was applied to estimate additive (D), dominance (H) and epistatic component of genetic variance for ten quantitative traits of tomato. Three testers, BT-17 and PS-1 and there hybrid (BT-17 x PS-1) were crossed to 15 inbred lines to develop the experimental material. Overall epistasis was important for days to flowering, number of flower/cluster and number of fruit/cluster. Significant estimate of both additive and dominance component were observed for all the characters, except number of branches per plant, number of fruit per cluster, fruit set per cent and number of fruit per plant for additive and plant height, number of branches per plant, number of fruit per cluster, fruit set per cent and number of fruit per plant for dominant component. The F value was positive and significant for number of branches per plant, number of fruit per cluster, number of fruit per plant and fruit size showing is odirectional nature of dominance. Significant of additive components and F parameter showing increasing effect on the characters, indicates that pedidree selection would be effective for improvement of such traits.
Genetic Relationship Assessment Of Superior Accessions Of Garcinia Gummi-Gutta L. Collected From Centraltravancore Region Using Rapd Markers
Author:Anu G. Krishnan, Thushara Susan Sabu1, Madhumol Jeevan1 Andgisheena Gopinath1
Volume: 7 | Issue no: 2-2016 | Pagination: 224-230
An experiment was conducted at Regional Agricultural Research Station, Kumarakom during 2014-15 with an objective to understand the genetic relationship of some superior Garcinia accessions having different geographic origin and maintained at germplasm collections of Regional Agricultural Research Station, Kumarakom, Kerala, India. Germplasm identification and characterization is an important link between conservation and utilization of plant genetic resources. In this study, random amplified polymorphic DNA (RAPD) markers were used to find out the genetic relationship of 30 garcinia accessions. This included two Garcinia varieties Amrutham and Haritham which were released during 2015 from this station. The primer OPM16 gave maximum number of polymorphic bands and OPAB16 produced least. Out of the total 397 alleles scored, 68.76 per cent were found to be polymorphic. The polymorphic information content (PIC) ranged between 0.14 (OPC 7) and 0.49 (OPAB 16) and marker index (MI) ranged from 0.01 (OPC 7) to 0.15 (OPM 16 and OPAB 16) among the primers used. Jaccard?s similarity co-efficient between genotypes ranged from 0.462 to 0.991. An UPGMA dendrogram was constructed using NTSYS pc 2.02e software and showed two major clusters. The variety Amrutham did not form any cluster and stood alone in the group whereas Haritham clustered in the second group. This is the first report for the molecular based genetic diversity studies for these accessions.
Combining Ability Studies In Tomato (Lycopersicon Esculentum Mill.)
Author:Vibhor Kumar1, J.P. Singh And Himanshu Kaushik1
Volume: 7 | Issue no: 2-2016 | Pagination: 220-223
Combining ability studies conducted using a diallel set of ten varieties of tomato (excluding reciprocal) revealed highly significantGCA and SCA effects for all characters studied. This showed that both additive and non-additive gene action were involved in the inheritance of these characters. The parental line P10 (H-29), P5 (Angoor Lata), P1 (Pusa Bahar) and P7 (Kalyanpur Tuape-1) were the best general combiners and top performing hybrid was P9XP10 (KS-16XKS-29), P7XP10 (Kalyanpur Type-1X KS-29) and P1XP9 (Pant BaharXKS-16) for most of the economic characters including yield.
Evaluation Of Experimental Hybrids In Early Growth Stages For Cold Tolerance In Maize
Author:Nirupma Singh And Ambika Rajendran1
Volume: 7 | Issue no: 2-2016 | Pagination: 216-219
To evaluate fifteen experimental hybrids at early seedling stages in winter season of northern India, a study was conducted during Rabi seasons of 2013-14 and 2014-15 with three checks. The experiment was laid out in Randomized Block Design with two replications and observations were recorded fortnightly from third week of December to last week of February. Cold stress significantly reduced the survival rate, seedling height, leaf appearance rate and leaf area in genotypes. Experimental hybrids, 12007x EL-KRNL-7, 12007 x A-89 and 131026 x131023 out-performed the superior check under cold conditions. Cold tolerant hybrids for early growth stages identified may be recommended for northern India in winter season after undergoing multi location yield trials. Further these hybrids can be utilized in breeding programmes.
Effect Of Different Levels Of Fertigation And Pesticide Application On Growth And Yield Of Chilli Cv. Sitara
Author:P.B. Jadhav, B.V. Padhiar1 And S.S. Dekhane2
Volume: 7 | Issue no: 2-2016 | Pagination: 211-215
The present investigation entitled ?effect of different levels of fertigation and pesticide application on growth and yield of chilli cv. SITARA.? was carried out during Rabi season of the year 2012 on the open field of ASPEE, Agricultural Research and Development Foundation, year-2012, Tansa farm, Maharashtra. The experiment was laid out in Randomized Block Design. The five treatments (Contol, 60% RDF + Indoxacarb @ 30g a.i. /ha, 80% RDF + Indoxacarb @ 40g a.i. /ha, 100% RDF + Indoxacarb @ 50g a.i. /ha and 120% RDF + Indoxacarb @ 60g a.i. /ha) were replicated five times. The plant height at 45 DAT (19.04 cm), 90 DAT (42.26 cm) number of branches per plant at 45 DAT (3.37), 90 DAT (5.36) was found maximum with 120 % RDF + Indoxacarb @ 60g a.i. /ha. The highest number of fruits per plant (66.32), fruit weight/ plant (172.07 g) and yield t ha-1 (12.86) was found in treatment T5 120 % RDF through fertigation. While, lowest number of fruits per plant (50.31), fruit weight / plant (123.07 g) and yield t ha-1 (9.07 t ha-1) was found in treatment control. The treatment 120 % RDF through fertigation registered maximum gross return (2,57,200 Rs./ hectare), net return (2,05,107.97 Rs./hectare) and benefit: cost ratio (3.94:1) whereas, control recorded minimum for that. The data clearly revealed that the yield obtained with treatment T5 (120 % RDF as fertigation) was significantly higher than all other treatments and also for growth parameters.
Integration Of Chemical And Cultural Methods For Weed Management In Wheat
Author:H. Patro1 Andm. Ray
Volume: 7 | Issue no: 2-2016 | Pagination: 207-210
An experiment was laid out to study the effect of integrated weed management practices for weed management in wheat variety Kalyansona during Rabi seasons of the year 2013 ? 2014 in Randomized Block Design at Central Research Station of Orissa University of Agriculture and Technology, Bhubaneswar ,Odisha. The experiment comprised of twelve weed management practices as treatments i.e. pendimethalin @1.0 kg ha-1 (2 DAS), metribuzin @ 0.3 kg ha-1(2 DAS), metsulfuron @ 0.02 kg ha-1(25 DAS), pendimethalin + One HW(25 DAS), pendimethalin + 2, 4-D EE @ 0.5 kg ha-1 (25 DAS), metsulfuron + One HW (25 DAS), metsulfuron + 2, 4-D EE @ 0.5 kg ha-1 (25 DAS), pendimethalin + metsulfuron (25 DAS), metribuzin + metsulfuron (25 DAS), 2, 4-D @ 0.5 kg ha-1 (25 DAS), Two hand weeding at 25 and 45 DAS and Unweeded control. Wheat was sown at row spacing 20 cm x 5 cm on flat beds. The results showed that when pendimethalin was applied along with one hand weeding at 25 days after sowing had the highest weed control efficiency percentage (95.35%) and also the crop gave the highest grain yield i.e. 2784 kg ha-1 followed by two hand weeding at 25 and 45 DAS ( grain yield 2677 kg ha-1), but in this case the weed control efficiency percentage was very low (17.44%). Uncontrolled weed growth throughout the crop growth caused a yield reduction of 29.12 to 62.14 per cent. It is concluded that pendimethalin + one hand weeding remarkably reduced the weed dry matter resulted in increase in weed control efficiency. The same treatment proved its superiority in increasing all yield attributing factors along with grain yield of wheat indicating the most effective integrated weed management practice for wheat.
Pre-sowing seed treatments with different chemicals and growth regulator on seed germination and growth of passion fruit
Author:Sangita Mehta, Birendra Prasad1 And Ajay Kumar Das2
Volume: 7 | Issue no: 2-2016 | Pagination: 201-206
Passion fruit is getting popularity and its cultivation is gradually increasing in India. Very few works had been carried out regarding cultivation of this fruit. For large production and easy procurement of planting material, propagation from seeds may be done. Hence, there is need to improve germinations and vigour of seedlings. Keeping the above points in view, the present investigation was carried out. In this experiment, pre-sowing seed treatments were done with different chemicals (50%HCl. 5%H2SO4, 1% thiourea, 1% KNO3, 2% sucrose, 2% urea, 2% bleaching powder) and growth regulator (100ppm GA3) on seed germination of passion fruit. The objective of this experiment was to standardize the effect of pre-sowing seed treatment which consisted of 9 treatments and one control. The experiment was laid out during 2009-10 and 2010-11 in experimental polyhouse in the Department of Horticulture, Birsa Agricultural University, Kanke, Ranchi (Jharkhand) and was conducted in the statistical design, CRD. All the treatments exhibited better results over untreated control, but (S8) seeds treated with 2 per cent bleaching powder in 24 hrs treatment emerged as the best regarding germination, growth of the seedlings followed by (S5) seeds treated with 100ppm GA3 for 30 min.
Contact and support
Terms and conditions
Frequently asked questions
Copyright © 2015
All rights reserved. SciArchives.