Author/Authors :
Günal, Hikmet Gaziosmanpaşa Üniversitesi - Ziraat Fakültesi - Toprak Bilimi ve Bitki Besleme Bölümü, Turkey , Acır, Nurullah Ahi Evran Üniversitesi - Ziraat Fakültesi - Toprak Bilimi ve Bitki Besleme Bölümü, Turkey , Polat, Atilla Gaziosmanpaşa Üniversitesi - Ziraat Fakültesi - Toprak Bilimi ve Bitki Besleme Bölümü, Turkey , Günal, Elif Gaziosmanpaşa Üniversitesi - Ziraat Fakültesi - Toprak Bilimi ve Bitki Besleme Bölümü, Turkey , Budak, Mesut Siirt Üniversitesi - Ziraat Fakültesi - Toprak Bilimi ve Bitki Besleme Bölümü, Turkey , Erdem, Nazife Gaziosmanpaşa Üniversitesi - Ziraat Fakültesi - Toprak Bilimi ve Bitki Besleme Bölümü, Turkey , Malı, Zekeriya Cıngıllı Organik Tarım İşletmeleri, Turkey , Önen, Hüseyin Gaziosmanpaşa Üniversitesi - Ziraat Fakültesi - Bitki Koruma Bölümü, Turkey
Abstract :
Salinity and high boron concentration soils are important problems constrain the agricultural productionin arid and semi-arid regions of the world. Considering the significant high spatial variation of salinityand boron concentration in the use of agricultural production and improvement of the problems isrequired in terms of time, labor and cost efficiency. This study was conducted to model and map the spatial variation of soil properties, and to identify the variables affecting the variation of salt and boronconcentrations of soils located under two center pivots. Soils have salinity and alkalinity problems alongwith the boron toxicity. Each 62 ha pivot area in Central Anatolia has been divided into 100m x 100msquare grids and 60 main sampling locations were created in each pivot area. Five transects in each pivotwere created to model the shorter distances than the distance between main sampling points and soil samples were collected from 0-20cm depths (total of 150 samples). Texture, pH, electrical conductivity(EC), organic matter, lime content and plant available boron concentrations of soils were analyzed.Semivariogram models were obtained to define the spatial variations and kriging maps were created foreach of soil properties. EC reached up to 17.35 dS m^-1 within the pivot and average EC of pivots was measured as 2.6 ve 3.52 dS m^-1, respectively. The average boron concentrations of soils were higher than the 5 mg kg^-1 that is the critical level accepted for plant growth. Boron had significant positivecorrelations (P 0.01) with pH and clay content, and significant negative relationship with silt and organicmatter contents. The relationship obtained in correlation analyses was also clearly observed in thedistribution maps of the same soil properties. Negative correlation between organic matter and boronconcentration reveals the importance of increasing the organic matter content of soils in the management of boron toxic soils.
NaturalLanguageKeyword :
Boron toxicity , Precision agriculture , Geostatistics , Site specific management , Salinity
