Determination of regression equations to predict soil extract salinity from aqueous soil samples (1:2 and 1:5) for calcareous and non-calcareous loamy soils

Semiz G. D., Atmaca Ö.

Journal of Food, Agriculture and Environment, cilt.11, sa.1, ss.748-750, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 11 Sayı: 1
  • Basım Tarihi: 2013
  • Dergi Adı: Journal of Food, Agriculture and Environment
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, CAB Abstracts, Food Science & Technology Abstracts, Veterinary Science Database
  • Sayfa Sayıları: ss.748-750
  • Anahtar Kelimeler: Calcareous soil, Loamy soil, Non-calcareous soil, Regression equation, Salinity, Soil extract, Soil paste, Soil water dilution, Soil:water ratio
  • Ankara Üniversitesi Adresli: Evet

Özet

The aim of the study was to reveal regression equations to predict soil extract salinities (ECe) for calcareous and non-calcareous soils. For this purpose, 12 calcareous and 12 non-calcareous soil samples were artificially salinized by 1.0, 5.0 and 10 dSm-1 saline waters which were prepared with NaCl. In order not to disturb the homogeneity of application of each sample, the saline waters were added to unapplied soils by the ratio of 1:1(w/w), and then oven dried at 105°C until reaching constant weight to prepare the saline soils to analyze. Hence, 3 salinity levels (1.0, 5.0 and 10 dSm-1), 24 soil samples (12 calcareous and 12 non-calcareous) and 3 methods (ECe, EC1:2 and EC1:5), total of 216 analyzes were performed. Saturation percentage of soils were recorded in order to recalculate aqueous soil samples back to soil:water ratio at saturation level. Thus, 8 regression equations were developed for specified conditions such as i) four equations for direct conversion from EC1:2 or EC1:5 to ECe, where there was no data on soil:water ratio at saturation point, for calcareous and non-calcareous conditions and ii) another four equations were calculated by soil:water ratio at saturation point from EC1:2 or EC1:5 to ECe, on where there were data on soil:water ratio at saturation point, for calcareous and non-calcareous conditions.