Journal of Applied and Natural Science
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Computation of correlations of fortified vermicompost with sulphur on seed yield and nutrient content of mustard [Brassica juncea]
Get PDFEffect of sulphur and fortified vermicompost on growth and yield of mustard [Brassica juncea] was carried out at College of Agriculture, Swami Keshwanand Rajasthan Agricultural University, Bikaner (Rajasthan) during rabi season: 2010-11. Sixteen treatment combinations comprising four levels of each sulphur and fortified vermicompost were evaluated. Grain yield (1993 kg ha-1) increased significantly (p < 0.05) up to 6.0 t vermicompost ha-1 along with 40 kg sulphur ha-1. As regards interactive effects of treatment, synergistic behavior was noted between 6.0 t vermi-compost ha-1 40 kg S ha-1 for seed yield, nitrogen, and phosphorus contents and also sulphur content and uptake by seed of mustard. The significantly higher P content in seed was recorded under 40 kg S ha-1 in combination with 4.0 t ha-1 vermicompost Combined effect of levels of vermicompost and sulphur on seed yield was found to be significant than control. The concomitant effect of 6.0 t vermicompost ha-1 and 40 kg S ha-1 application was found highly pronounced on seed yield and sulphur content in seed of mustard
Performance of strawberry cultivars in mid hill region of Kullu valley of Himachal Pradesh
Get PDFThe present study was carried out to evaluate the performance of strawberry cultivars in mid hill region of Kullu valley of Himachal Pradesh. For this purpose nine strawberry cultivars viz Addie, Belrubi, Brighton, Chandler, Dana, Etna, Fern, Pajaro and Selva were planted at spacing of 30 x 15 cm in double rows on raised beds of 1m × 3m size at Regional Horticultural Research and Training Station, Bajaura, Kullu, Himachal Pradesh. The experiment was laid out in a Randomized block design. The maximum plant height (16.37cm) was recorded with cv. Belrubi and maximum plant spread was attained by cv. Fern (EW 23.27 cm and NS 21.03 cm), maximum leaf length (16.90 cm) was recorded by cv. Belrubi and minimum (10.00 cm) with cv. Dana. The maximum leaf area was recorded with Chandler (76.03 cm2). The maximum fruit weight (14.93gm), total soluble solids (12.00oB), reducing sugars (5.01%) and total sugars (5.44%) were recorded with cv. Chandler. The maximum fruit yield per plant was observed with cv. Belrubi (996.3g/plant) which was closely followed by cv. Chandler (966.7 g/plant). Thus from the above studies it is concluded that Strawberry cultivars Belrubi and Chandler were best for commercial cultivation in mid hill region of Kullu valley of Himachal Pradesh
Global positioning system based spatial and temporal distribution of new leaf curl begomovirus disease on sunflower in Northern Karnataka
Get PDFLeaf curl disease on sunflower caused by begomovirus genus of the family geminiviridae. Present investigations on field survey for disease incidence, field diagnostic symptoms and its spatial and temporal distribution in major sunflower growing parts of North Eastern Karnataka through GPS system during 2013-14, revealed that the disease was found to occur at all the stages of sunflower under field condition and exhibited symptoms such as vein thickening (enations) on abaxial surface of the leaves, upward curling and reduction in leaf size and severe discoluration of capitulum (Head) followed by bushy appearance. GPS based survey indicated that the % disease incidence varied from location to location (spatial variation) and also from season to season (temporal variation). The low incidence was noticed during Kharif condition which is ranged between 6.34-11.16, with the average incidence of 11.2%, 7.4% and 6.3% in Koppal, Raichur and Ballari districts repectively. Whereas during Rabi/summer season, high magnitude of disease noticed in many of the locations surveyed and is recorded upto 92.9 %. The GPS maps plotted based on PDI scale (0-3) represents high risk areas of the disease in Raichur and adjacent areas of Nort Eastern Karnataka and the result shows that the disease occurrence was more in rabi as compared to Kharif situations irrespective of locations. GPS survey map is an indicator to locate the nature of disease spread so as to conclude the hotspot areas
Effect of milling speed on the quality and storage stability of maize flour
Get PDFThis work was undertaken to evaluate the effect of milling speed on the quality and shelf life of maize flour. Maize flour was prepared using low speed mini flour mill at 75 and 115 rpm and the results were compared with the flour prepared by commercial flour mill on the basis of recovery of flour, rise in temperature of flour, time taken, particle size distribution and changes in different quality parameters during storage. It was observed from the analysis that the recovery of flour was highest (95.26%) at 75 rpm speed although the time taken was more i.e. 27.27 minutes, but the rise in temperature during milling was very less (12.240C) as compared to commercial mill the temperature rose up to 31.120C. It was noted that the maize flour prepared at low speed was light yellow in color as compared to higher rpm which was dark yellow. The maize flour prepared at 75 rpm can be stored in low density polyethylene LDPE packaging material of (200 gauge) for two months without change in quality parameters. It was observed that the moisture content, protein content, fat content, alcoholic acidity and carbohydrates was significantly affected by storage time, packaging material and milling speed at P<0.05. Therefore, at low speed the storage stability as well as nutritional properties of the flour can be enhanced. The improved shelf life of flour can result in better marketability
Sundarbans mangrove deltaic system – An overview of its biodiversity with special reference to fish diversity
Get PDFWorld heritage site-Sundarbans were declared as the world’s 560th Ramsar Wetlands site in 1992. Sundarbans ecosystem supports rich fisheries diversity and also natural biodiversity hot spot, because it is natural habitat of many endangered species. The Sundarbans is a home to a variety of faunal species, the total of 1586 species has been recorded which includes 481 Vertebrate species (30%), 1104 Invertebrate species (70%). Mangroves are the nursery and breeding grounds for several commercially important species of aquatic fauna like fish, shrimps and prawns etc. Mangrove ecosystems are of great ecological significance in the tropical and sub-tropical coast. Sundarbans mangrove provides a variety of ecosystem services. However, the Sundarban mangrove forest is the most threatened habitats in the world, increased population with few alternative livelihood opportunities poses a serious threat as it is the main cause of mangrove destruction. The total value of Sundarbans is not recognized and therefore often neglected in development planning. As a result Sundarbans conservation issue is getting less importance at the national level. The study reveals that major ecosystem services of Sundarbans are timber, fuel wood, fish, ecotourism, cyclone and storm protection, biodiversity, and habitat for flora and fauna. Timber, fuel wood and fish are more economical provisioning services in Sundarbans. It is noticed that there is decreasing tendency of overall revenue collection from the mangrove over the period of 2001-02 to 2009-10. The attention from national and international communities is needed for sustainable management and conservation of the Sundarbans. The study suggests that further research on total economic value of Sundarbans is needed for providing comprehensive scientific information for policy as well as for decision makers
An application of principal component analysis for pre- harvest forecast model for rice crop based on biometrical characters
Get PDFAn application of principal component analysis for the development of suitable statistical models for preharvest forecast of rice yield based on biometrical characters has been dealt with in the present paper. The data obtained from the two experiments on rice have been utilised to develop the model. The forecast yields of based onthese models have been found to be 24.25, 22.60 and 21.10 q/ha against the actual yield of 28.00, 23.56 and 21.85 q/ha, respectively, in experiment –I. For experiment –II the forecast yields were found to be 24.62, 28.06 and 29.43 q/ha against the actual yield of 28.82, 29.31 and 26.59 q/ha, respectively. These forecast yields are subject to maximum of almost 10 percent standard error. In most of the cases, the forecast yields were found to be close to the actual yield except in some cases. The values of R2, i.e. 79.80 and 72.60 for experiment –I and II, respectively, indicate the validity of the models. Statistical tool like viz. principal component analysis (PCA) has been first time applied to develop pre-harvest forecast model based on experimental data
Effect of post harvest treatments and harvesting stage on vase life and flower quality of cut Oriental lily
Get PDFAn investigation was carried out to study the effect of post harvest treatments and harvesting stage on vase life and flower quality of cut Oriental lily cv. Avocado. The results showed that highest vase life (15.83 days) and vase solution uptake (49.17 ml) was recorded with sucrose (2%) + 5-SSA (200ppm), whereas maximum flower diameter (15.17 cm) was recorded in vase solution containing sucrose (2%) + 5-SSA (100ppm). Earliest opening of florets (4.42 days) reported under sucrose (2%) + 5-SSA (200ppm). Effect of treatments was found non-significant in respect to opening of florets. Harvesting at green bud stage exhibited extended vase life (14.33 days) and higher vase solution uptake (40.43 ml), whereas maximum flower diameter (14.25 cm) recorded at 75% colour development stage. Based on the results it is concluded that 5-SSA could be an inexpensive and potential chemical for delaying senescence and for extending the keeping quality of cut liliums commercially
Effect of spacing, fertilizers and varieties on growth and yield parameters of okra (Abelmoschus esculantus (L.) Moench)
Get PDFThe experiment was conducted during spring summer seasons of 2013 and 2014 conducted at Research Farm of Vegetable Science, CCS HAU, in summer season. There were three spacing, three fertilizer levels and two varieties in split-split plot design with three replications. Growth parameters of okra crop were significantly affectedby spacing, fertilizer and varieties. Highest plants were observed in wider spacing with fertilizer application of 187.5 kg N + 75kg P2O5 + 60 kg K2O per hectare in variety HBT-49-1. However, numbers of branches were highest in variety Hisar Unnat. Yield attributes like first fruiting node, intermodal length, fruit length and diameter etc. were highest in variety HBT-49-1 resulting in highest fruit yield (q/ha) in spacing 30 cm x 10 cm with the application of 187.5 kg N+75 kg P2O5 + 60 kg K2O per hectare. The seed yield attributes and yield was significantly affected by spacing, fertilizer and varieties. Finally, spacing 30 cm × 10 cm resulted in higher growth parameters, yield attributes and yield with the application of 187.5 kg N +75 kg P2O5 + 60 K2O in variety HBT-49-1 of okra
Genetic variability in sugarcane (Saccharum spp. hybrid) genotypes through inter simple sequence repeats (ISSR) markers
Get PDFIn the present study, 14 sugarcane (Saccharum spp. hybrid) genotypes were used for genomic diversity analysis based on nineteen inter simple sequence repeat (ISSR). These nineteen sets of ISSR markers generated a total of 164 discernible and reproducible bands including 109 polymorphic and 55 monomorphic bands. The unweighted pair group method with arithmetic average (UPGMA) analysis revealed three distinct clusters: I, II and III within the 14 genotypes. The polymorphic information content (PIC) value per locus ranged from 0.14 (UBC811) to 0.53 (ISSR1) locus with an average of 0.42 for all loci. The range of genetic distance or coefficient of similarity among sugarcane genotypes varied 0.14 - 0.78. The analysis of these similarities matrix revealed that greater similarity between CoS03234 and CoSe1424 (0.78), and lowest similarity between CoS03234 and Co0118 (0.14). The knowledge gained in this study would be useful to future breeding programs for increasing genetic diversity of sugarcane varieties and cultivars to meet the increasing demand of sugarcane cultivation for sugar and bio energy uses
Population dynamics of citrus whitefly, Dialeurodes citri (Ashmead) on Citrus reticulate (Mandarin) var. Kinnow as influenced by weather conditions
Get PDFA field study on population dynamics of citrus whitefly, Dialeurodes citri (Ashmead) on citrus mandarin (var. Kinnow) was carried out during 2014-15 at Centre of Excellence (COE) for Fruits situated in village Mangiana of district Sirsa, Haryana. The population of nymphs and adults of this pest was recorded from March 2014 to February 2015 at weekly interval. The nymphal population of the pest was observed only between 12th to 47th meteorological standard weeks (SW) with two major peaks i.e. one during 16th SW with a population of 83.44 nymphs/ 20 leaves and the second during 40th SW with a population of 133.22 nymphs/20 leaves. The above said population dynamics confirmed that this pest remained inactive in pupal stage during winter i.e. 48th to 11th SW. Similar trend was observed in respect of adult population. Nymphal population showed significant positive correlation with morning relative humidity (r = 0.329) and sunshine hours (r = 0.362), while adult population was found to have positive correlation with sunshine hours only (r = 0.332). Multiple regression analysis of the pest population with environment variables indicated that out of 45 per cent variability in nymphal population, 37 per cent was due to relative humidity and sunshine hours. Out of the total variability of 30 per cent variation in adult population, 20 per cent was due to evening relative humidity, while 10 per cent attributed to sunshine hours. The other weather parameters were found to have no significant correlation with the pest population. Although study of population dynamics of this study were conducted elsewhere but this is first study of its kind in the state of Haryana. The population dynamics revealed by this study have far reaching significance in pest management strategy as integrated control measures may be focused only during the period wherein population exceeds economic threshold level (ETL). The information on population dynamics of any insect pest in a given ecological niche should be considered as starting point for evolving eco - friendly pest management package