The studying effect of soil clay content and bulk density on moisture measuring accuracy by TDR
Journal Title: Journal of Research in Ecology - Year 2017, Vol 5, Issue 1
Abstract
Time domain reflectometry has been used for measuring water content in soil that in this method water content is measured based on the relationship between water content and dielectric constant (K). The aim of this research is to compare of the TDR measurements and gravimetrically determined soil water content and determine the relationship between soil water content obtained from these two methods based on mathematical equations (linear, quadratic and cubic) for five soil texture (Clay, Sandy Clay Loam, Loam, Sandy Loam and Sandy) in 15 moisture ranges. Also the other objectives of this study were to investigate the influence of soil bulk density and clay content on TDR measurements. Soil samples were taken from five areas with different textures (sand, sandy loam, loam, sandy clay loam and clay). All physical properties of the soil, including clay, silt and sand contents were specified. The impact of soil bulk density and clay content on the accuracy of TDR is an undeniable fact. The high amounts of clay and low amounts of Soil bulk density caused an underestimation of water content. The multivariate linear regressions equation obtained from data is (R2 = 0.98): where ‘θ’, is the volumetric water content, ‘ε’ is the soil dielectric constant, ‘ρb’ is the soil bulk density (g cm-3), ‘ρs’ is the soil density (g cm-3), ‘% clay’ is the percentage of clay-sized particles, and ‘% silt’ is the percentage of silt-sized particles (P<0.01).
Authors and Affiliations
Abdulfattah Salarashayeri, Maaroof Siosemarde
Application of botanical foliar spray on the control of fungal diseases of Vigna radiata (mung bean) in Uyo, South-South Nigeria
A field trial was conducted at the University of Uyo Teaching and Research farm, Use-offot, during 2015 at various seasons to assess the fungicidal potentials of some plants as foliar sprays in the control of fungal di...
Modeling of leaf area of three Afromontane forest tree species through linear measurements
Leaf area is an important parameter for evaluating growth, development and competitive ability of forest trees. Destructive methods of leaf area determination often require substantial financial investment and technical...
Physical changes of spent hen meat tenderized with different levels of bromelain enzyme
This study was conducted to determine the effect of bromelain enzyme tenderization on the physical parameters of spent hen meat from October 2017 to December 2017 at agriculture college laboratory-Al-Muthanna University....
Effect of feeding different levels of lemon seed oil on the production performance of broilers
This study was conducted at the Abu Ghraib Poultry Research Station of the Agricultural Research Department, Ministry of Agriculture for the period from 22 of January to 25 of February 2018, to study the effect of adding...
Does distribution of Acridomorpha is influenced by parasitoid attack? A model with Scelio aegyptiacus (Priesner, 1951) in the experimental farm
In a survey of the Acridomorpha assemblage in two different sampling localities I and II at an experimental farm, Faculty of Agriculture, Cairo University-ten different species had been recorded. These species were belon...