Assessment of Spatial Variability in Penetration Resistance as Related to Some Soil Physical Properties of Two Fluvents in Turkey
Yazarlar (3)
Niğde Üniversitesi, Türkiye
Prof. Dr. Engin ÖZGÖZ
Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Tokat Gaziosmanpaşa Üniversitesi, Türkiye
| Makale Türü | Özgün Makale |
| Makale Alt Türü | SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale |
| Dergi Adı | Soil and Tillage Research |
| Dergi ISSN | 0167-1987 Wos Dergi Scopus Dergi |
| Dergi Tarandığı Indeksler | SSCI |
| Dergi Grubu | Q4 |
| Makale Dili | İngilizce |
| Basım Tarihi | 01-2004 |
| Cilt No | 76 |
| Sayı | 1 |
| Sayfalar | 1 / 11 |
| DOI Numarası | 10.1016/j.still.2003.08.009 |
| Makale Linki | www.elsevier.com/locate/still |
| Özet |
| The objectives of this study were to determine the relationships between soil penetration resistance (PR) and some physical soil properties affecting soil PR, with classical statistical and geostatistical methods, and to observe the formation of a plow pan and its variability in the study area, which was conventionally tilled for a long period of time. Soil textures of fields studied were clayey loamy (typic Ustifluvent) and loamy (mollic Ustifluvent), respectively. Each field of 1.5ha was divided into 15m×15m grids (6 lines on the north-south direction and 11 lines on east-west direction). Soil samples were collected at two depths (0-15 and 15-30cm) of each grid center. Bulk density (BD) had the minimum variability in proportion to water content, clay, silt, and sand contents, and PR had the maximum variability in both soils. PR values for both fields ranged from 300 to 5000kPa, having a mean of 1522kPa at 0-15cm depth and 3844kPa at 15-30cm depth of clayey loamy, and a mean of 2210kPa at 0-15 depth and 4355kPa at 15-30cm depth of loamy. Both fields have been applied conventional tillage forming from mouldboard plough (about 20cm depth), cultivator (about 15cm depth) and disc harrow (about 10cm depth) for a long a period of time. It can be concluded that the tillage practices caused the formation of a plow pan at a depth of 20cm where the maximum PR values were obtained. The correlation coefficients between BD, clay content and sand content at clayey loamy, and water content and BD at loamy and PRs were significant. Soil properties with strong spatial correlations (low nugget variance/total semivariance ratio) were water content, clay, silt, and sand contents and PR in the clayey loamy, and BD and sand content in the loamy. Semivariograms of these variables with high spatial dependence were fitted into the linear model. Range values were greater than 107m. Soil properties were considerably spatially varied at small distances at 15-30cm depths of both fields. PR had higher spatial variability at smaller distances than the lowest separation distance at clayey loamy as compared to the loamy. The results showed that spatial variability in PR depends on BD, clay content and sand content at clayey loamy, and water content and BD at loamy fields. Continuous moldboard plowing at the same depth caused formation of a plow pan below the tillage depth. This plow pan can be alleviated by varying depth of tillage over time or by special tillage operations. © 2003 Elsevier B.V. All rights reserved. |
| Anahtar Kelimeler |
| Penetration resistance | Soil compaction | Soil properties | Spatial variability |
Science Direct
Assessment of Spatial Variability in Penetration Resistance as Related to Some Soil Physical Properties of Two Fluvents in Turkey
BM Sürdürülebilir Kalkınma Amaçları
| Atıf Sayıları | |
| SCOPUS | 74 |
| Google Scholar | 129 |