Turan Yüksek

Effects of Land Management Types on Surface Soil Properties and Aboveground Herbaceous Biomass Production in Semihumid Region in Turkey

The effects of various land-use regimes on the aboveground herbaceous biomass yield and soil properties were studied in the semihumid region in Turkey. Field soil samples under the four land-use types (grassland I, grassland II, grassland III, and apple orchard) were collected from the experimental sites. The aboveground herbaceous biomass yield was determined from a single May harvest each year during three growing seasons. General statistical tools were used to analyze soil and aboveground herbaceous biomass data. The results indicated that saturated hydraulic conductivity, total porosity, and lime content were significantly less In soils under the gramine pasture, legume pasture, and apple orchard compared to the control site. Plant-available water, soil organic matter, total nitrogen, and available phosphorus were significantly less in soils under grassland II compared to the control site. The general linear model (GLM) indicated that aboveground herbaceous biomass yield was affected by the management type and rain.

Effects of clear-cutting alder coppice on surface soil properties and aboveground herbaceous plant biomass.

The purpose of this investigation was to evaluate the effects of clear‐cutting and skidding impacts on surface soils in an alder coppice and aboveground herbaceous biomass. For this purpose, experimental sites used in the study were a randomized complete block with four replications. Some soil properties were measured at 60 pits at 0 to 5 cm and 5 to 10 cm deep in control, normal harvest, and main skid trail sites. In the main skid trail site, as compared to the control and normal harvest site, the bulk density increased from 0.90 to 1.52g cm−3, the soil organic‐matter content decreased from 4.77% to 1.65%, and saturated hydraulic conductivity decreased from 86.34 to 9.6 cm h−1 at 0 to 5 cm deep. Optimization of harvesting time and rehabilitation of skid roads needed to be done to prevent and minimize negative impacts of the skid roads on soils.