Rapid Field Technique for Soil Salinity Appraisal in North Nile Delta Using EM38 through Some Empirical Relations
Journal Title: International Journal of Plant & Soil Science - Year 2017, Vol 14, Issue 5
Abstract
Diagnosis of soil salinity and its spatial variability is required to establish control measures in irrigated agriculture. Soil salinity can vary temporally and spatially due to dynamic nature of soluble salts. For these reasons, practical methods for measuring soil salinity (ECe) are required to achieve faster, cheaper, and reliable surveys. Thus, the bulk soil electrical conductivity (ECa) was measured directly in the field using portable sensors (EM38) in vertical position (EMV) or horizontal position (EMH). Therefore, the objective of this research was to develop statistical relations between ECa and ECe and assess whether they could be applied for salinity predicting and mapping. The empirical relations were established to convert EM38 readings (ECa) in mSm-1 to ECe values in dSm-1 for different depths. So, ECe was determined in soil samples collected from 33 sites at depths of 0-30, 30-60 and 60-90 cm. Also, 33 EM readings (EMV and EMH) taken at soil sampling sites were used to derive equations for salinity prediction. Fifteen quadratic or multiple regression models were established to describe the relations between the original or logarithmic values of both ECa and ECe. The statistical comparison measurements; coefficient of determination (R2), simple correlation coefficient (r) and t-test were also used to evaluate the relationships between the actual and predicted ECe values to select the relevant models. So, two preferable models were chosen and one equation for each soil depth was derived from each selected model to be used for ECe predicting. These equations allow useful prediction of ECe using ECa values, since ECa values are regressed strongly with ECe values (R2 > 0.70). Also, the actual and the predicted ECe levels were highly correlated (r > 0.80), in addition to insignificant differences between them according to t-test.
Authors and Affiliations
Hesham M. Aboelsoud, Mohamed A. E. AbdelRahman
Keywords
Related Articles
- EP ID EP316568
- DOI 10.9734/IJPSS/2017/30858
- Views 94
- Downloads 0
Effect of Variety and Spacing on Growth and Yield of Maize (Zea mays L.) in Bauchi State, Nigeria
A field experiment was conducted at the Abubakar Tafawa Balewa University teaching and research farm Bauchi state of Nigeria, during the 2013 rainy season, to investigate the effect of variety and intra-row spacing on gr...
Sulphur and Chlorine Effects on Yield and Quality in Fresh Corn
Aims: To investigate sulphur (S) and chlorine (Cl) effects on fresh ear yield, yield components and quality in fresh corn. Study Design: A 3 × 1 × 3 field experiment was set up in RCBD, with three replications. This was...
Yield and Yield Components of Maize as Affected by Planting Density
An experiment was carried out to investigate the effect of planting density on growth, development, yield and yield components contributing characteristics of maize during the period of November, 2012 to March 2013 in th...
Influence of Tillage Practice and Cropping System on Growth Attributes and Grain Yield of Maize [Zea mays L.] in the Forest Agro-ecological Zone of Ghana
Tillage is one of the most important practices in agricultural production due to its influence on the physical, chemical, and biological properties of the soil environment. Field experiments were conducted to find out th...
Palynological Features of Iris sintenisii (Iridaceae)
This study is a palynological description of the pollen grains of Iris sintenisii, Iridaceae. The pollen samples were collected in the hills of Krasta next to Elbasan city, Albania. The palynological features of the poll...