The Experts below are selected from a list of 36636 Experts worldwide ranked by ideXlab platform

Zakaria M. Sawan - One of the best experts on this subject based on the ideXlab platform.

  • Different Statistical Methods Studying the Nature Relationships between Climatic Factors and Cotton Production
    2020
    Co-Authors: Zakaria M. Sawan
    Abstract:

    Understanding the impacts of Climatic Factors on cotton production may help physiologists to determine the control mechanisms of boll retention in cotton. However, weather affects crop growth interactively, sometimes resulting in unexpected responses to prevailing conditions. This study investigates the statistical relationship between Climatic Factors and production of flowers and bolls obtained during the development periods of the flowering and boll stage. Also, predicting effects of Climatic Factors during different convenient intervals (in days) on cotton flower and boll production compared with daily observations. Further, collects information about the nature of the relationship between various Climatic Factors and cotton boll development and the 15-day period both prior to and after initiation of individual bolls. And, provide information on the effect of various Climatic Factors and soil moisture status during the development stage on flower and boll production in cotton.Â

  • Cotton production and Climatic Factors: Studying the nature of its relationship by different statistical methods
    Cogent Biology, 2017
    Co-Authors: Zakaria M. Sawan
    Abstract:

    This study investigates the statistical relationship between various Climatic Factors and overall flower and boll production. Also, the relationship between Climatic Factors and production of flowe...

  • Different statistical methods to collect information about the adverse effects of Climatic Factors on cotton production
    American Journal of Biotechnology and Bioscience, 2017
    Co-Authors: Zakaria M. Sawan
    Abstract:

    This study investigates the statistical relationship between various Climatic Factors and overall flower and boll production. Also, predicting effects of Climatic Factors during different convenient intervals (in days) on cotton flower and boll production compared with daily observations. Further, collects information about the nature of the relationship between various Climatic Factors and cotton boll development and the 15-day period both prior to and after initiation of individual bolls. And, provide information on the effect of various Climatic Factors and soil moisture status during the development stage on flower and boll production in cotton. Evaporation, sunshine duration, relative humidity, surface soil temperature at 1800 h, and maximum air temperature, are the important Climatic Factors that significantly affect flower and boll production. The five-day interval was found to be more adequately and sensibly related to yield parameters. Evaporation; minimum humidity and sunshine duration were the most effective Climatic Factors during preceding and succeeding periods on boll production and retention. There was a negative correlation between flower and boll production and either evaporation or sunshine duration, while that correlation with minimum relative humidity was positive.

  • Applied methods for studying the relationship between Climatic Factors and cotton production.
    Agricultural sciences, 2013
    Co-Authors: Zakaria M. Sawan
    Abstract:

    This study investigates the statistical relationship between Climatic variables and aspects of cotton production (G. barbadense), and the effects of Climatic Factors prevailing prior to flowering or subsequent to boll setting on flower and boll production and retention in cotton. The effects of specific Climatic Factors during both pre- and post-anthesis periods on boll production and retention are mostly unknown. However, by determining the relationship of Climatic Factors with flower and boll production and retention, the overall level of production can be possibly predicted. Thus, an understanding of these relationships may help physiologists determine control mechanisms of production in cotton plants. Also, the study covers the predicted effects of Climatic Factors during convenient intervals (in days) on cotton flower and boll production compared with daily observations. Further, cotton flower and boll production as affected by Climatic Factors and soil moisture status has been considered. Evaporation, sunshine duration, relative humidity, surface soil temperature at 1800 h, and maximum air temperature, are the important Climatic Factors that significantly affect flower and boll production. The least important variables were found to be surface soil temperature at 600 h and minimum temperature. The five-day interval was found to be more adequately and sensibly related to yield parameters. Evaporation, minimum humidity and sunshine duration were the most effective Climatic Factors during preceding and succeeding periods on boll production and retention. There was a negative correlation between flower number and boll production and either evaporation or sunshine duration, while that correlation with minimum relative humidity was positive. The soil moisture status showed low and insignificant correlation with flower and boll production. Higher minimum relative humidity, short period of sunshine duration, and low temperatures enhanced flower and boll formation.

  • Cotton (Gossypium barbadense) production as affected by Climatic Factors and soil moisture status
    Acta Ecologica Sinica, 2012
    Co-Authors: Zakaria M. Sawan
    Abstract:

    Abstract This study investigates the statistical relationship between Climatic variables and aspects of cotton production ( Gossypium barbadense ), and the effects of Climatic Factors prevailing prior to flowering or subsequent to boll setting on flower and boll production and retention in cotton. Also, the study covers the predicted effects of Climatic Factors during convenient intervals (in days) on cotton flower and boll production compared with daily observations. Further, cotton flower and boll production as affected by Climatic Factors and soil moisture status has been considered. Evaporation, sunshine duration, relative humidity, surface soil temperature at 1800 h, and maximum air temperature, are the important Climatic Factors that significantly affect flower and boll production. The least important variables were found to be surface soil temperature at 0600 h and minimum temperature. The 5-day interval was found to be more adequately and sensibly related to yield parameters. Evaporation; minimum humidity and sunshine duration were the most effective Climatic Factors during preceding and succeeding periods on boll production and retention. There was a negative correlation between flower and boll production and either evaporation or sunshine duration, while that correlation with minimum relative humidity was positive. The soil moisture status showed low and insignificant correlation with flower and boll production. Higher minimum relative humidity, short period of sunshine duration, and low temperatures enhanced flower and boll formation.

Richard J Foote - One of the best experts on this subject based on the ideXlab platform.

  • egyptian cotton gossypium barbadense flower and boll production as affected by Climatic Factors and soil moisture status
    Theoretical and Applied Climatology, 2010
    Co-Authors: Zakaria M. Sawan, Louis I. Hanna, Willis L. Mccuistion, Richard J Foote
    Abstract:

    The information on impact of Climatic Factors on cotton production is not generally available, or at least not available in the required form. Understanding this impact may help physiologists determine a possible control of the flowering mechanism in the cotton plant. Two field trials were conducted to investigate the relationships between Climatic Factors, soil moisture status, and flower and boll production of Gossypium barbadense. The Climatic Factors considered were daily maximum air temperature (°C), minimum air temperature (°C), maximum–minimum temperature (diurnal temperature range) (°C), sunshine duration (h day−1), maximum relative humidity (%), minimum relative humidity (%), and wind speed (m s−1). Minimum relative humidity and sunshine duration were the most significant Climatic Factors affecting flower and boll retention and production. Temperature appeared to be less important in the reproduction growth stage of cotton in Egypt than minimum relative humidity and sunshine duration. The soil moisture status showed low and insignificant correlation to flower and boll production. High minimum relative humidity, short period of sunshine duration, and low temperatures enhanced flower and boll formation.

A. A. Taratorin - One of the best experts on this subject based on the ideXlab platform.

  • Effect of Regional Climatic Factors on Reducing Noise Level from Power Equipment
    Thermal Engineering, 2018
    Co-Authors: V. B. Tupov, A. A. Taratorin, V. S. Skvortsov
    Abstract:

    The effect of regional Climatic Factors exerted on noise reduction from power equipment is considered based on data processing results for 210 cities over the territory of Russia. The value of the required noise reduction determines the capital and operating costs of silencers, shields, and other facilities designed to reduce the noise produced by power equipment. At the same time, the regional Climatic Factors exert a different effect on the required noise reduction from power equipment: they can be neglected at low frequencies on the one hand, while this influence can be crucial at high frequencies on the other hand. It is shown that the influence of Climatic Factors in different regions significantly differs at the same octave band frequency, and this difference can amount to several dozen decibels. With increasing octave band frequency, this difference increases. For example, at a octave band frequency amounting to 8 kHz, the greatest change ranges from 60–100 dB/km for the European part of Russia to 160 dB/km for northeastern Siberia. It is shown that an incorrect determination of the sound attenuation coefficient α in the atmosphere can lead, on the one hand, to an excess expenditure of energy resources at higher real α values, and, on the other hand, to the absence of any expected effect after the implementation of environmental measures at lower real α values. Thus, in developing measures for the attenuation of power equipment noise, it is necessary to take into account the effect of regional Climatic Factors, especially at high frequencies.

  • influence of Climatic Factors and the ground surface on the required noise abatement from power equipment
    Thermal Engineering, 2013
    Co-Authors: V. B. Tupov, A. A. Taratorin
    Abstract:

    The influence of Climatic Factors and the ground surface on the required noise abatement from the power equipment is analyzed. It is shown that annual oscillations of temperature and humidity lead to substantial variations in the levels of the sound and the sound pressure from the same source in the design point, while the ground effect surface can in some cases cause an increase in the sound pressure levels in the design point, and in other cases—their decrease. When developing the measures on sound suppression of the power equipment, it is recommended to take into account the influence of Climatic Factors depending on annual variations in temperature and humidity for this terrain as well as on the category of the ground surface.

Ya Li - One of the best experts on this subject based on the ideXlab platform.

  • spatiotemporal variation in vegetation coverage and its response to Climatic Factors in the red river basin china
    Ecological Indicators, 2018
    Co-Authors: Zhijia Gu, Xingwu Duan, Ya Li
    Abstract:

    Abstract Vegetation coverage is a critical factor in soil conservation and improving the ecological environment. As an important ecological corridor connecting China's southwest and Southeast Asia, the Red River Basin is characterized by vulnerable ecosystems and serious soil erosion. Identifying the heterogeneity in vegetation coverage and its response to Climatic Factors are critical for ecological protection and soil and water conservation. MOD13Q1 NDVI data with a spatial resolution of 250 m and 16 d temporal resolution were collected from 2000 to 2014. The maximum synthesis method, univariate linear regression, Hurst exponent, and partial correlation analysis were used to detect the spatiotemporal variation and sustainability of vegetation coverage and characterize the relationship between vegetation NDVI and Climatic Factors in the wet season in the Red River Basin. NDVI showed a rather significant increasing trend in the wet season. The “corridor-barrier” function of valleys and mountains affected the spatiotemporal patterns in the Longitudinal Range-Gorge Region. Areas of improved, degraded, and stable vegetation coverage accounted for 50.1%, 27.1%, and 22.8% of the total, respectively. The role of precipitation was higher than temperature in the interaction between NDVI and Climatic Factors. A time lag effect was found in the NDVI response to rainfall and temperature variation. Different vegetation types showed various spatiotemporal responses to Climatic Factors. Human activities, especially the implementation of the Grain for Green Project (GFGP), affected the spatial and temporal patterns of vegetation coverage.

V. B. Tupov - One of the best experts on this subject based on the ideXlab platform.

  • Effect of Regional Climatic Factors on Reducing Noise Level from Power Equipment
    Thermal Engineering, 2018
    Co-Authors: V. B. Tupov, A. A. Taratorin, V. S. Skvortsov
    Abstract:

    The effect of regional Climatic Factors exerted on noise reduction from power equipment is considered based on data processing results for 210 cities over the territory of Russia. The value of the required noise reduction determines the capital and operating costs of silencers, shields, and other facilities designed to reduce the noise produced by power equipment. At the same time, the regional Climatic Factors exert a different effect on the required noise reduction from power equipment: they can be neglected at low frequencies on the one hand, while this influence can be crucial at high frequencies on the other hand. It is shown that the influence of Climatic Factors in different regions significantly differs at the same octave band frequency, and this difference can amount to several dozen decibels. With increasing octave band frequency, this difference increases. For example, at a octave band frequency amounting to 8 kHz, the greatest change ranges from 60–100 dB/km for the European part of Russia to 160 dB/km for northeastern Siberia. It is shown that an incorrect determination of the sound attenuation coefficient α in the atmosphere can lead, on the one hand, to an excess expenditure of energy resources at higher real α values, and, on the other hand, to the absence of any expected effect after the implementation of environmental measures at lower real α values. Thus, in developing measures for the attenuation of power equipment noise, it is necessary to take into account the effect of regional Climatic Factors, especially at high frequencies.

  • influence of Climatic Factors and the ground surface on the required noise abatement from power equipment
    Thermal Engineering, 2013
    Co-Authors: V. B. Tupov, A. A. Taratorin
    Abstract:

    The influence of Climatic Factors and the ground surface on the required noise abatement from the power equipment is analyzed. It is shown that annual oscillations of temperature and humidity lead to substantial variations in the levels of the sound and the sound pressure from the same source in the design point, while the ground effect surface can in some cases cause an increase in the sound pressure levels in the design point, and in other cases—their decrease. When developing the measures on sound suppression of the power equipment, it is recommended to take into account the influence of Climatic Factors depending on annual variations in temperature and humidity for this terrain as well as on the category of the ground surface.