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Displaying 341 - 345 of 1605methodological approach for deriving regional crop rotations as basis for the assessment of the impact of agricultural strategies using soil erosion as example
Regarding increasing pressures by global societal and climate change, the assessment of the impact of land use and land management practices on land degradation and the related decrease in sustainable provision of ecosystem services gains increasing interest. Existing approaches to assess agricultural practices focus on the assessment of single crops or statistical data because spatially explicit information on practically applied crop rotations is mostly not available.
Assessment of landscape aesthetics—Validation of a landscape metrics-based assessment by visual estimation of the scenic beauty
The assessment of cultural ecosystem services, in our case landscape aesthetics, is the most commonly investigated but least formalized issue in the scope of the ecosystem services concept. In contrast to ecological or economic aspects, the assessment of aesthetics cannot easily be based on quantitative information. Therefore, two different methodological approaches that assess landscape aesthetics either from an objective or a subjective point of view have been established in the past. This article presents in its first part an objective, landscape metrics-based assessment approach.
Implications of land-cover types for soil erosion on semiarid mountain slopes: Towards sustainable land use in problematic landscapes
The impact of land-cover types on soil erosion and runoff, as well as on physico-chemical soil properties, was monitored. The study area, an agroforestry landscape was located in Sierra Nevada Mountains in south-eastern Spain. Eight land-cover types were investigated: farmland planted with olive, almond, and cereals; forest with P. halepensis and P. sylvestris; shrubland; grassland; and abandoned farmland. The erosion plots replicated twice were located on hillslopes, where erosion and runoff were measured after 22 storm events.
Estimation and comparision of curve numbers based on dynamic land use land cover change, observed rainfall-runoff data and land slope
The CN represents runoff potential is estimated using three different methods for three watersheds namely Barureva, Sher and Umar watershed located in Narmada basin. Among three watersheds, Sher watershed has gauging site for the runoff measurements. The CN computed from the observed rainfall-runoff events is termed as CN₍PQ₎, land use and land cover (LULC) is termed as CN₍LU₎ and the CN based on land slope is termed as SACN₂. The estimated annual CN₍PQ₎ varies from 69 to 87 over the 26years data period with median 74 and average 75.
Sink or source—The potential of coffee agroforestry systems to sequester atmospheric CO₂ into soil organic carbon
Current carbon accounting methodologies often assume interactions between above-ground and below-ground carbon, without considering effects of land management. We used data from two long-term coffee agroforestry experiments in Costa Rica and Nicaragua to assess the effect on total soil organic carbon (SOC) stocks of (i) organic versus conventional management, (ii) higher versus moderate agronomic inputs, (iii) tree shade types. During the first nine years of coffee establishment total 0–40cm depth SOC stocks decreased by 12.4% in Costa Rica and 0.13% in Nicaragua.