|Evett, Steven - Steve|
Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 7/5/2000
Publication Date: N/A
Technical Abstract: This study examines the spatial variability of pH, electrical conductivity (EC), soil organic carbon (SOC) at three depths (0-5 cm, 5-15 cm, and 15-25 cm), and soil water content at 0-15 cm in 200 x 350 m plots on adjacent cropland and rangeland. Surface cropland pH (mean=7.59, standard deviation (SD)=0.44) and EC (mean=156.09 mS/cm, SD=81.70 mS/cm) were more variable than rangeland (mean=6.77 and 120.08 mS/cm, SD=0.33 and 46.48 mS/cm, respectively), and had strong and moderate spatial dependence. Rangeland did not have any spatial at this depth. Surface cropland SOC (mean=0.49%, SD=0.188%) was less variable than rangeland (mean=1.16%, SD=0.462%), but both had moderate spatial dependence. The difference between these two systems was less distinct at other depths. Soil water content was more variable and exhibited strong spatial dependence on cropland, but moderate spatial dependence on rangeland. Grazing cattle has strong influence on the esoil spatial variability on rangeland.