筛选
科学数据
统计数据
共检索到40条 ,权限内显示50条;
The Swift Current hillslopes, Saskatchewan: Digital elevation data
- 负责人：
- FRDR-DFDR;;FRDR-DFDR
- 关键词：
- tillage elevation data DEM high-resolution topography micro-topography hillslopes agriculture seeding Prairies
- DOI：
- doi:10.20383/101.0117
- 摘要：
- The Swift Current hillslopes at the Swift Current Research and Development Centre on the Canadian Prairies are a long-term hydrological research site. Over the last 50 years, the site has supported research on the effects of climate change and land management change on snowmelt-runoff, soil erosion and nutrient transport from agricultural hillslopes. High-resolution digital elevation data are essential for spatially-distributed understanding of these runoff delivery and transport processes. The three hillslopes are rectangular in shape, each approximately 150 m wide (east-west) and 300-320 m long (north-south), with areas of 4.25 ha (Hillslope 1), 4.66 ha (Hillslope 2), and 4.86 ha (Hillslope 3). This dataset provides two sets of bare-ground digital elevation data for the Swift Current hillslopes. The first set contains digital elevation data collected at a 2 m horizontal resolution for each of the three hillslopes using a Leica Viva GS15 on 17-18 April 2012. The second set contains two digital elevation models at a 0.25 m horizontal resolution for Hillslope 2 obtained using an Optech ILRIS-LR Terrestrial Laser Scanner on 7 July 2014 and 24 September 2014. These finer-resolution 2014 surveys capture the surface micro-topography of Hillslope 2 under a tilled condition with non-directional variations in surface roughness (random toughness) as well as under a seeded condition with uni-directional ridge-and-furrow features (oriented roughness). These digital elevation data provide the scientific and engineering communities with an opportunity to advance our understanding of spatial hydrological processes and the importance of micro-topographic features.
Data from: Naturalized plants decrease diet similarity between an invasive bird and its most similar native species
- 负责人：
- Rodrigues, Gon?alo
- DOI：
- doi:10.5061/dryad.p6v85cm
- 摘要：
- agricultural practices (e.g. irrigation, tillage, harvest) that are underexploited by the native fauna. Understanding which invasive animals fill those vacant niches
Massachusetts Tax Valuation Records, 1771;;Archival Version
- 负责人：
- 关键词：
- DOI：
- doi:10.3886/icpsr07734
- 摘要：
- of tillage, bushels of grain produced per year, barrels of cider produced per year, acres of salt marsh, tons of salt marsh hay per year, acres of English
Multivariable field trial data sets of organic and extensive cropping systems for agro-ecosystem modelling in 1992-1998 from Müncheberg,Germany
- 负责人：
- Leibniz Centre For Agricultural Landscape Research (ZALF) E.V. , Müncheberg (Germany);;Research Platform Models And Simulation, Leibniz Centre For Agricultural Landscape Research (ZALF)E.V.;;Science, German National Library Of
- 关键词：
- agriculture ecosystem model soil soil water crop rotation yield (agricultural) management weather weather monitoring
- DOI：
- doi:10.4228/zalf.1992.366
- 摘要：
- r fractions, sugar content in beet), weather (standard meteorological variables) and management (soil tillage, sowing, fertilisation, irrigation, harvest
Data from: A global experimental dataset for assessing grain legume production
- 负责人：
- 关键词：
- DOI：
- doi:10.5061/dryad.mf42f
- 摘要：
- e also included. The dataset is arranged into a relational database with nine structured tables and 198 standardized attributes. Tillage, fertilization
Data from: Recommendations for assessing earthworm populations in Brazilian ecosystems
- 负责人：
- DOI：
- doi:10.5061/dryad.4md0s64
- 摘要：
- data on sampling date, geographic coordinates, vegetation, soil type, land use management (including tillage, fertilizer and pesticide use), size, numb
Data from: A functional diversity approach of crop sequences reveals that weed diversity and abundance show different responses to environmental variability
- 负责人：
- Mahaut, Lucie
- 关键词：
- Agroecology Crop rotation Disturbance Resources availability Hill's number functional diversity crop sequences Weed management
- DOI：
- doi:10.5061/dryad.qf0k11c
- 摘要：
- and tillage intensities to test whether management intensity affects the response of weed diversity and abundance to crop sequence diversity. 3. At the pluri
Data from: Fallow management increases habitat suitability for endangered steppe bird species through changes in vegetation structure
- 负责人：
- DOI：
- doi:10.5061/dryad.85b47d1
- 摘要：
- t on the presence of the three studied species. Through changes in the vegetation structure, Shredding + Herbicide and Tillage increased the occurrence of the Stone
Understanding the factors conditioning fall armyworm (Spodoptera frugiperda J.E. Smith) infestation in African smallholder maize fields and quantifying its impact on yield. A case study in Eastern Zimbabwe.
- 负责人：
- Baudron, Frédéric
- 关键词：
- DOI：
- doi:10.7910/dvn/yykx1t
- 摘要：
- stage estimated using the V notation, maize variety, crop species being intercropped if any), tillage (mode and dates), fertilization (type and quantity
Data from: Plant functional traits and environmental conditions shape community assembly and ecosystem functioning during restoration
- 负责人：
- DOI：
- doi:10.5061/dryad.2175q
- 摘要：
- s of functional traits and ecosystem functioning. Environmental conditions were predictive of trait composition. Sites restored directly from tillage (as opposed to those
