Topographic Indices and Yield Variability in a Rolling Landscape of Western Canada
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Cited by (24)
Smart agriculture and digital twins: Applications and challenges in a vision of sustainability
2023, European Journal of AgronomyWeather-dependent relationships between topographic variables and yield of maize and soybean
2022, Field Crops ResearchCitation Excerpt :Several researchers have investigated the relationship between observed crop yield and landscape characteristics using geospatial tools (Green and Erskine, 2004; Kravchenko et al., 2005; Kumhalova et al., 2011; Singh et al., 2019). Different metrics and indices have been evaluated as predictors of crop yield, such as slope, landscape position, topographic wetness index, surface curvature, and upslope area, each performing well in some instances and failing to correlate in others (Chi et al., 2009; Huang et al., 2008; Kravchenko and Bullock, 2000; Thelemann et al., 2010; Wendroth et al., 2003). We posit that the inconsistent relationships between yield and landscape characteristics among studies may be attributed to the interaction of topography and weather.
Soil nitrous oxide emissions from no-till canola production under variable rate nitrogen fertilizer management
2021, GeodermaCitation Excerpt :The Prairie Pothole region of North America, which covers a vast area of land (ca. 715,000 km2) extending from the north-central United States to south-central Canada (United States Geological Survey, 2019), is characterized by a complex undulating topography of cropland and shallow wetlands (i.e., “potholes”). In consideration of spatially variable crop yields (Chi et al., 2009; Moulin et al., 1994) and soil properties (Guenette and Hernandez-Ramirez, 2018) in the region, the application of a uniform rate of N fertilizer for an entire field regardless of slope positions may result in inefficient resource use (Beckie et al., 1997; Walley et al., 2001). The over application of fertilizer in field zones with low yield potential may result in loss of excess N into the surrounding environment (e.g., higher N2O emissions) and the under application of fertilizer in more favourable production zones may result in the loss of yield potential.
Geomorphology, soil and vegetation patterns in an arid ecotone
2019, CatenaCitation Excerpt :The greater diversity under drier conditions at paleobars compared to paleochannels agrees with Rueter and Bertolami (2010) for other environments of Patagonia, where dense shrublands occupying moister soils showed lower diversity than open shrublands under more xeric conditions. Moreover, higher organic carbon concentration in paleochannels is in accordance with greater organic matter levels for concavities, furrows, washes and surface depressions (Cantón et al., 2004; Chi et al., 2009; Sebastiá, 2004; Wondzell et al., 1996) and is consistent with the trend towards greater humidity in that landform (Pei et al., 2010). Conversely, Larrea dominance over highly calcic soils was also reported in North America (Hamerlynck et al., 2000; Laity, 2008) and has been linked to its tolerance for high soil osmotic potential (Shreve and Hinckley, 1937).
Scale- and location-specific relationships between soil available micronutrients and environmental factors in the Fen River basin on the Chinese Loess Plateau
2016, CatenaCitation Excerpt :A multiple flow direction algorithm was employed to obtain the catchment area (Freeman, 1991). The topographic wetness index was derived from the slope and catchment area parameters (Moore et al., 1991), which is related to the soil moisture redistribution in the landscape or soil erosion and accumulation (Chi et al., 2009). where Im and Re denote the imaginary and real part of WiXY(s) respectively.
Cover crop effect on corn growth and yield as influenced by topography
2014, Agriculture, Ecosystems and EnvironmentCitation Excerpt :Kaspar et al. (2004) also reported negative relationships between corn yields and terrain slope and curvature in dry years, whereas positive relationships were observed with elevation and terrain slope in wet years. Chi et al. (2009) found that wheat grain yields were positively correlated to elevation and negatively correlated to flow length in a wet year, while opposite trend was observed in a dry year. The results reported in these studies and our own experiment are strong evidence that weather conditions play an important role in the relationship of topography, cover crop biomass, and crop yield.
Project supported by the National Science and Engineering Research Council (NSERC) of Canada.