scholarly journals Soil Nutrient Analysis Underneath Grewia optiva Population

2021 ◽  
Vol 12 (6) ◽  
pp. 645-654
Author(s):  
H. P. Sankhyan ◽  
◽  
Jyoti Dhiman ◽  
Krishan Chand ◽  
Prachi - ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Leaf Area ◽  
Pearson Correlation ◽  
Soil Nutrient ◽  
Dry Weight ◽  
Nutrient Analysis ◽  
Positive Correlation ◽  
Significant Difference ◽  
Grewia Optiva ◽  
The Impact

The present study was conducted during May and November, 2019 and 2020 and here we quantify the impact of soil nutrient variation on the population growth of Grewia optiva Drummond of different districts with variable climate and heterogeneous soils. The impacts on growth parameters (tree height, crown spread, leaf traits, fruit dimensions) of selected populations of Grewia optiva Drummond statistically analyzed using ANOVA and Pearson correlation coefficient. Five composite soil samples were taken at 15–30 cm depth, on seven selected districts of Himachal Pradesh viz., total 35 samples were analyzed for physiochemical properties. Soil of Mandi district registered with acidic pH as compared to soil pH of other districts. There was significant difference in pH, OC, EC, N, P, K and in Bulk density within selected population of each district. pH range of moderately acidic to moderately alkaline (according to standard soil classification) founded best for growth of this species. There was highly positive correlation observed between Nitrogen and leaf area (0.33), Phosphorus and leaf area (0.45). 100 leaf fresh weight showed highly positive correlation with Nitrogen (0.37) and organic carbon (0.39). 100 leaf dry weight showed highly positive correlation with Nitrogen and Organic Carbon. Crown spread showed highly positive correlation with Organic carbon (0.29), Nitrogen (0.38) and with Phosphorus (0.30). Moderately Positive correlation observed between Potassium and 100 fruit dry weight (0.15). 50% of soil texture observed as sandy loamy and sandy clay loamy.

Physico-chemical properties of soil under Grewia optiva in Himachal Pradesh, India

2021 ◽  
Vol 44 (1) ◽  
pp. 5-11
Author(s):  
Hari Sankhyan ◽  
Jyoti Dhiman ◽  
Krishan Chand ◽  
Prachi . ◽  
Karishma .
Keyword(s):  
Organic Carbon ◽  
Leaf Area ◽  
Chemical Properties ◽  
Dry Weight ◽  
Himachal Pradesh ◽  
Positive Correlation ◽  
Physico Chemical ◽  
Grewia Optiva ◽  
The Impact ◽  
Properties Of Soil

Study on Physico chemical properties of soil is important for sustainable management of agricultural crops, field trees and for their economic growth. Here, we quantify the impact of soil nutrient variation on the population growth of Grewia optiva Drummond with variable climate and heterogeneous soils. The impacts on growth parameters (tree height, crown spread, leaf traits, fruit dimensions) of selected populations of Grewia optiva Drummond statistically analyzed using one way ANOVA and Pearson correlation coefficient. Five composite soil samples were taken at 15-30cm depth, on seven selected districts of Himachal Pradesh viz., total 35 samples were analyzed for physiochemical properties. Soil of Mandi district registered with acidic pH as compared to soil pH of other districts. There was significant difference in pH, OC, EC, N, P, K and in Bulk density within selected population of each district. pH range of moderately acidic to moderately alkaline (according to standard soil classification) founded best for growth of this species. There was highly positive correlation observed between Nitrogen and leaf area(0.33), Phosphorus and leaf area (0.45). 100 leaf fresh weight showed highly positive correlation with Nitrogen (0.37) and organic carbon (0.39).100 leaf dry weight showed highly positive correlation with Nitrogen and Organic Carbon. Crown spread showed highly positive correlation with Organic carbon (0.29), Nitrogen (0.38) and with Phosphorus (0.30). Moderately Positive correlation observed between Potassium and 100 fruit dry weight (0.15). 50% of soil texture observed as sandy loamy and sandy clay loamy.

scholarly journals Container Volume and Height Affect Shoot and Root Development in Marigold Seedlings

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 868B-868
Author(s):  
Jennifer Marohnic ◽  
Robert L. Geneve
Keyword(s):  
Cell Volume ◽  
Leaf Area ◽  
Seedling Growth ◽  
Root Development ◽  
Dry Weight ◽  
Seedling Development ◽  
Root Number ◽  
Positive Correlation ◽  
Root Dry Weight ◽  
The Impact

Marigold seedlings were grown in four containers that differed in both volume and shape. Seedlings grown in 1.5-gal containers showed the greatest potential for shoot and root development 20 days after sowing. These seedlings had greater leaf area, shoot and root dry weight, and total root number and length compared to seedlings grown in 406 plug trays, 72-cell packs, or 6-inch containers. There was a positive correlation (r2 = 0.81) between cell volume and seedling growth as well as a positive correlation (r2 = 0.89) between container height with seedling growth. An attempt was made to separate the impact of container volume vs. container height on seedling growth. Containers were designed using acrylics to vary the container height while keeping the volume constant at 1500 cm3. There was a positive correlation (r2 = 0.87) between shoot and root dry weight with container height. The data suggest that both container volume and height contribute to overall seedling growth in marigold, but when container volume is not limiting, container height has a large impact on seedling development.

scholarly journals The Effect of IELTS Listening Strategy Use on the Reduction of IELTS Listening Test Anxiety and on IELTS Listening Performance

2017 ◽  
Vol 7 (11) ◽  
pp. 1025 ◽  
Author(s):  
Ali Reza Nemat Tabrizi ◽  
Mahnaz Ranjbar
Keyword(s):  
Test Anxiety ◽  
Pearson Correlation ◽  
Strategy Instruction ◽  
Strategy Use ◽  
Control Group ◽  
Listening Test ◽  
Significant Difference ◽  
Post Test ◽  
The Impact ◽  
Experimental Group

The study investigates the impact of IELTS listening strategy use on the reduction of listening test anxiety and on the listening performance of the IELTS test takers in light of the data of 80 participants on the pretest and post-test IELTS listening along with the participants' score on pre-anxiety and post anxiety scale. So, drawing on the instruments including a proficiency test, pre/post-test, anxiety questionnaire, materials for strategy instruction, the participants were randomly divided into two groups: Control Group and Experimental Group, each including 40 participants. As per the procedure, after tackling their pre-listening performance and pre-anxiety score, one group was treated with IELTS-Listening related strategies and the other group was not treated, but both were administered listening test. The results of the study indicated that those treated with IELTS strategy outperformed ( t (78) = 4.57, p = .000, r = .460 ) those receiving no listening-related strategy. Furthermore, the results of a t-test run on the post-test of the groups anxiety arrived at a statistically significant difference (t (78) = 5.77, p = .000, r = .547), representing that the control group outperformed the experimental group. Also, Pearson Correlation done for finding out a potential relationship between anxiety and listening performance indicated a negative and weak to moderate relationship ((r (78) = -.26, p = .020). The pedagogical implications of the study are in detailed argued.

scholarly journals Interregional analysis of the incidence as an instrument of improvement of the system of socio-hygienic monitoring

2021 ◽  
Vol 100 (6) ◽  
pp. 633-639
Author(s):  
Vladimir V. Kolomin ◽  
Natalya I. Latyshevskaya ◽  
Vladimir. S. Rybkin ◽  
Irina A. Kudryasheva
Keyword(s):  
Comparative Analysis ◽  
Pearson Correlation ◽  
Federal District ◽  
Specific Factor ◽  
Child Population ◽  
Software Packages ◽  
Significant Difference ◽  
Efficiency And Effectiveness ◽  
Scientific Substantiation ◽  
The Impact

Introduction. The purpose of the study was to scientifically substantiate the unification of methods for analyzing the morbidity of the population, and comparative analysis of the morbidity of the child population at the interregional level within the framework of social and hygienic monitoring. Objective. The scientific substantiation of the feasibility of an inter-regional comparative analysis of the incidence of the population in the constituent entities of the Russian Federatio to increase the efficiency and effectiveness of management decisions developed as part of social and hygienic monitoring. Material and methods. A comparative analysis of the incidence in the regions of the Southern Federal District, the occurrence and development of which is associated with air pollution, was carried out. Statistical data processing was performed by linear regression using the Statgraphics and Microsoft Excel software packages. The calculation of the Pearson correlation coefficient r to evaluate the severity of the existing trend in the variation of the variation series and the determination coefficient (R2), taking into account the reliability coefficient p <0.05. Assessed approaches to the analysis of the incidence of children in the framework of socio-hygienic monitoring in the subjects. Results. The study revealed the lack of a unified approach to the analysis of the morbidity of the population in the constituent entities of the Russian Federation within the framework of socio-hygienic monitoring, both according to the criteria for determining the priority pathologies for the region, and the duration of the analyzed period. The comparative analysis of the morbidity of the child population at the interregional level showed a significant difference in the dynamics and levels of morbidity from ecologically caused pathologies in adjacent regions, with similar social and climatic parameters. The formation of human health takes place under the conditions of the multicomponent influence of various factors. The etiology of most of the nosological forms, the degree of their dependence on the state of the external environment have been scientifically established. The most determined by the components of the environment, ecologically caused pathologies, the nature of the incidence of which is considered by the authors as a possible manifestation of the impact of a specific factor that has a priority value in the occurrence and development of these diseases. Conclusions. The study shows the expediency of unifying methods for analyzing the incidence of the population, as well as conducting a comparative analysis of the incidence of the child population at the interregional level within the framework of socio-hygienic monitoring.

The Organic carbon content of gravel bed herring spawning grounds and the impact of herring spawn deposition

1993 ◽  
Vol 73 (4) ◽  
pp. 863-870 ◽  
Author(s):  
Ian R. Napier
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Dry Weight ◽  
Published Data ◽  
Organic Carbon Content ◽  
Spawning Grounds ◽  
The Past ◽  
Benthic Food ◽  
The Impact

The dry weight and organic carbon content of eggs and components of Clyde spring herring eggs were measured at intervals during their development. Comparison with previously published data suggests that an increase has occurred in the weight of these eggs over the past thirty years. It is clear that only a small proportion of the material deposited in the form of herring spawn actually remains attached to the substratum when the larvae hatch and so is available for potential integration into the benthic food web. This was confirmed by the determination at intervals over two years of the organic carbon content of the gravel sediments on spawning grounds of the Clyde spring herring. Although the deposition of herring spawn resulted in an immediate marked increase in the carbon content of the spawning ground sediments, carbon levels quickly returned to pre-spawning levels and there was no evidence of any permanent or long lasting increase. This held true when the spawn died and decayed in situ and even when it was mixed into the sediment by wave action. The rapid decrease in carbon levels is attributed to the strong water movements which frequently occur over the spawning grounds.

scholarly journals Grassland fire effect on soil organic carbon reservoirs in a semiarid environment

Solid Earth ◽  
2013 ◽  
Vol 4 (2) ◽  
pp. 381-385 ◽  
Author(s):  
A. Novara ◽  
L. Gristina ◽  
J. Rühl ◽  
S. Pasta ◽  
G. D'Angelo ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Vegetation Type ◽  
Soil Surface ◽  
Dry Weight ◽  
Grassland Management ◽  
Semiarid Environment ◽  
Significant Difference ◽  
Before And After ◽  
Grassland Fire

Abstract. The aim of this work was to investigate the effect of an experimental fire used for grassland management on soil organic carbon (SOC) stocks. The study was carried out on Hyparrhenia hirta (L.) Stapf (Hh) grassland and Ampelodesmos mauritanicus (Desf.) T. Durand &amp; Schinz (Am) grasslands located in the north of Sicily. Soil samples were collected at 0–5 cm before and after the experimental fire, and SOC was measured. During the grassland fire, soil surface temperature was monitored. Biomass of both grasses was analysed in order to determine dry weight and its chemical composition. The results showed that SOC varied significantly with vegetation type, while it is not affected in the short term by grassland fire. Am grassland stored more SOC compared with Hh grassland thanks to lower content in the biomass of the labile carbon pool. No significant difference was observed in SOC before and after fire, which could be caused by several factors: first, in both grassland types the measured soil temperature during fire was low due to thin litter layers; second, in a semiarid environment, a higher mineralization rate results in a lower soil carbon labile pool; and third, the SOC stored in the finest soil fractions, physically protected, is not affected by fire.

ERCC1, KRAS mutation, redox status, and oxaliplatin sensitivity in colorectal cancer: “Radical” change in an old model.

2012 ◽  
Vol 30 (15_suppl) ◽  
pp. e14156-e14156
Author(s):  
Armando Orlandi ◽  
Mariantonietta Di Salvatore ◽  
Michele Basso ◽  
Cinzia Bagalà ◽  
Antonia Strippoli ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Colorectal Cancer ◽  
Metastatic Colorectal Cancer ◽  
Cell Lines ◽  
Pearson Correlation ◽  
Redox Status ◽  
Mutational Status ◽  
Retrospective Clinical Study ◽  
Significant Difference ◽  
The Impact

e14156 Background: Oxaliplatin (Oxa) is widely used in metastatic colorectal cancer, but currently there are not valid predictors of response to this drug. In our recent retrospective clinical study we have shown a greater efficacy of Oxa in patients with metastatic colorectal cancer with mutated (mt) K-RAS. We hypothesized that the mutational status of K-RAS could influence the expression of ERCC1 and cellular Redox status. Methods: We used four cell lines of colorectal cancer: two K-RAS wild type (wt) (HCT-8, HT-29) and two K-RAS mt (SW620, SW480). We evaluated the sensitivity of these cell lines to Oxa by MTT-test and the ERCC1 levels before and after 24h exposure to Oxa by RT-PCR. We silenced K-RAS in a K-RAS mt cell lines to evaluate the impact on Oxa sensitivity and ERCC1 levels. We also silenced ERCC1 in order to confirm the importance of this protein as a Oxa resistance factor. Cellular oxidative stress was determined by DCFDA. Results: The K-RAS mt cell lines were more sensitive to Oxa (p<0.001). The basal levels of ERCC1 did not show significant differences between K-RAS mt and wt cell line, however, after 24h exposure to Oxa, only the K-RAS wt lines showed the ability to induce ERCC1, with a statistically significant difference (p<0.005). The silencing of K-RAS in K-RAS mt cell lines (SW620s) demonstrated to reduce sensitivity to Oxa associated with the acquisition of the ability to induce ERCC1. The silencing of ERCC1 in K-RAS wt cell lines enhance the sensibility to Oxa. The levels of reactive oxygen species were higher in K-RAS mt cell lines. The Pearson correlation test showed a statistically significant relationship between basal levels of ROS and sensitivity to Oxa ("r" -0,988, p<0.01). The baseline levels of ROS were higher SW620 than the line SW620s. The administration of Oxa in these cell lines resulted in a statistically higher fluorescence index in SW620 versus SW620s (p<0.003). Conclusions: The K-RAS mutated cell lines were more sensitive to Oxa. This feature seems to be secondary to the inability of these cells to induce ERCC1 after exposure to Oxa and to the synergism between K-RAS mutation and Oxa in increasing oxidative stress. K-RAS can thus be a predictor of response to Oxa in colorectal cancer.

scholarly journals Relationship among specific leaf area, leaf nitrogen, leaf phosphorus and photosynthetic rate in herbaceous species of tropical dry deciduous in Vindhyan highlands

2017 ◽  
Vol 6 (2) ◽  
pp. 1531 ◽  
Author(s):  
Prajjwal Dubey ◽  
Raghubanshi A. S. ◽  
Anil K. Dwivedi*
Keyword(s):  
Leaf Area ◽  
Photosynthetic Rate ◽  
Specific Leaf Area ◽  
Pearson Correlation ◽  
Colorimetric Method ◽  
Correlation Coefficients ◽  
Ground Level ◽  
Dry Weight ◽  
Leaf Nitrogen ◽  
Herbaceous Species

A range of leaf attributes was measured for 17 herbaceous species in four contrasting habitats fortnightly from July to September during 2996-2007. All herbaceous vegetation in 5 randomly located plots within each of four sites were clipped at ground level and analyzed fortnightly. Leaf area was recorded by the leaf area meter (Systronics; Leaf area meter- 211). Fresh leaves were dried at 80o C for 48 hr to estimate their dry weight. Specific Leaf Area (SLA) was determined as ratio of leaf area to leaf dry weight. Leaf nitrogen was measured by Kjeldahl method and phosphorus by phosphomolybdic blue colorimetric method. The obtained values were subjected to Two- tailed Pearson correlation coefficients using SPSS (2004 ver. 13) package. SLA, leaf nitrogen, leaf phosphorus and photosynthetic rate show positive relationship with each other.

scholarly journals The Impact of Diabetes and African American Race in COVID-19 Severity

2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. A350-A351
Author(s):  
Marilyn A Arosemena ◽  
Athalia Pyzer ◽  
Jovian Yu ◽  
Blake Flood ◽  
Sherin Rouhani ◽  
...  
Keyword(s):  
African American ◽  
Pearson Correlation ◽  
Severity Index ◽  
Older Age ◽  
Moderate Severity ◽  
High Severity ◽  
Significant Difference ◽  
The Impact ◽  
The Relationship ◽  
African American Race

Abstract Introduction: COVID-19, an illness caused by the novel coronavirus usually presents as a mild to moderate flu like illness, but can lead to pneumonia, acute respiratory distress syndrome and death in some patients. Since the onset of the COVID-19 pandemic there has been special attention towards patients with diabetes. Not only is diabetes highly prevalent in patients with COVID-19, but diabetes has been reported as a significant predictor of morbidity and mortality. Furthermore, race seems to be a predictor of severity with black people dying at 2.3 times the rate of white people. Methods: Here we performed a retrospective study of 524 cases of COVID-19 at an academic center in Chicago between March 2020 until August 2020. Data were obtained from patients that consented to the study to examine the relationship between diabetes, BMI, age, and race with degree of COVID-19 severity. Not all patients had all clinical and demographic data available. COVID-19 severity was determined using a severity index obtained from the measured SpO2 divided by the FiO2/fraction of inspired oxygen times 100. Numbers ≥ 315 mmHg were defined as low severity with patients generally requiring outpatient care, while 235–314 mm Hg were classified as moderate severity generally requiring inpatient care and≤ 234 mm Hg indicated high severity generally requiring intubation/ICU care. The Pearson correlation coefficient was used for linear correlation analyses. Proportion for categorical values were compared using the Chi squared test, the means for continuous variables were compared using two-tailed t tests or one way ANOVA (with Tukey post-test) for comparisons involving more than two conditions. A multiple linear regression model was used to assess the contribution of different variables. Differences were considered statistically significant at p&lt;0.05 Results: Among 120 patients with an A1c, 55 (46%) patients had diabetes and 65 (54%) did not have diabetes. More patients with a high severity index were seen in the cohort with diabetes compared to those without diabetes (72% compared to 28% p=0.004). Univariate analyses revealed statistically significant positive correlations with higher COVID-19 severity and older age, BMI, and African American race. ANOVA analysis revealed a statistically significant difference between increasing BMI and worse severity category with a BMI mean of 29.3 kg/m2 in the low severity category compared to 34.9 kg/m2 in the moderate severity category (p=0.006). A multi-variate analysis adjusting for all variables revealed that A1c, older age and race were positively associated with higher COVID-19 severity. Conclusion: Increased A1c, older age and race are positively and independently associated with a higher COVID-19 severity index. Further research regarding the relationship between COVID-19 and these associations is urgently needed.

scholarly journals Yield and yield components of papaya grown on Coto clay (Typic Eutrustox) and fertilized with chicken manure

1969 ◽  
Vol 88 (3-4) ◽  
pp. 123-134
Author(s):  
Miguel A. Muñoz ◽  
Nydia Rafols ◽  
Julia M. O’Hallorans
Keyword(s):  
Correlation Coefficient ◽  
Pearson Correlation ◽  
Dry Weight ◽  
Inorganic Fertilizer ◽  
Chicken Manure ◽  
Available Phosphorus ◽  
Fertilizer Treatment ◽  
Soil Available Phosphorus ◽  
Significant Difference ◽  
Bray 1

A field experiment was established on Coto clay (Typic Eutrustox) to evaluate the use of chicken manure as fertilizer for papaya. Four manure rates (0, 5,10 and 15 t/ha) were evaluated in all possible combinations with four rates of inorganic fertilizer (0, 56, 112 and 224 g/plant/month of 15-15-15). Fresh and dry weight of papaya leaves (petioles and blades) increased significantly with manure applications, but no effect of inorganic fertilizer treatments was observed. Phosphorus and potassium concentration in papaya blades was higher in plots receiving 15 t/ha of chicken manure. Fertilizer applications increased K content in blades and decreased magnesium content. Both manure and fertilizer treatments increased fruit yield. The application of 10 and 15 t/ha of manure resulted in fruit yields of 42.19 and 54.76 t/ha. These yields were significantly higher than the yields obtained with the 0 and 5 t/ha treatments. The 0, 56,112 and 224 g/plant/month fertilizer treatments resulted in fruit yields of 28.11, 42.60, 37.22 and 38.25 t/ha, respectively. The yield of the 0 fertilizer treatment was significantly lower, but no significant difference was observed among the other fertilizer treatments. Chicken manure applications increased soil available phosphorus (Bray 1-P) from 16.57 to 28.64 mg/kg, and soil exchangeable potassium from 0.12 to 0.19 cmolc/kg. Fertilizer applications had no significant effect on these two parameters. A significant correlation was observed between papaya yield and Bray 1-P. A Pearson correlation coefficient of 0.65 was obtained when both manure and inorganic fertilizer plots were considered. The correlation coefficient increased to 0.82 when only manure-treated plots were considered, but decreased to 0.25 when only fertilizer-treated plots were considered. Manure applications were more effective in increasing soil available phosphorus than fertilizer applications. Manure applications apparently prevent phosphorus fixation on Coto clay, increasing soil available phosphorus and thus favoring higher fruit yields. 

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