caa a22 4500 445864397 CHVBK 20180317145453.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s11119-011-9221-x doi (NATIONALLICENCE)springer-10.1007/s11119-011-9221-x The impact of topography on soil properties and yield and the effects of weather conditions [Elektronische Daten] [Jitka Kumhálová, František Kumhála, Milan Kroulík, Štěpánka Matějková] Quantitative knowledge of the factors and interactions affecting yield is essential for site-specific crop management. One of the factors that frequently affects yield is topography. The aims of this study were to compare elevation data obtained from a combine harvester yield monitor and a hand RTK-GPS, and to evaluate the relationships between the spatial variation of cereal yield, selected crop nutrient concentration and topographic attributes derived from the two sources of elevation data. Simple models of elevation, slope and flow accumulation were created from the data of an experimental field in the Czech Republic, and the relations between yield and soil nitrogen and organic carbon contents and topography were determined over a four-year period. The models of elevation, slope and flow accumulation were compared with the yield, and soil nitrogen and organic carbon contents during the growing seasons of 2004, 2005, 2006 and 2007 in relation to total precipitation and temperature. The relationship between yield and topographic attributes was evaluated with the help of geostatistical methods. The results of correlation analysis among the variables were evaluated statistically by forward stepwise linear regression. No significant differences between elevation data from the combine harvester yield monitor and RTK-GPS were found. There was a significant relation between yield and crop nutrient concentration with topography. The correlation coefficients between flow accumulation and yield were weak for the wetter years and strong for the drier years. Springer Science+Business Media, LLC, 2011 Topography nationallicence Flow accumulation nationallicence Yield nationallicence GIS nationallicence Focal statistics nationallicence Soil nutrient content nationallicence Kumhálová Jitka Crop Research Institute, Drnovská 507, Ruzyně, 161 06, Prague 6, Czech Republic aut Kumhála František Faculty of Engineering, Department of Agricultural Machines, Czech University of Life Sciences Prague, Kamýcká 129, Suchdol, 165 21, Prague 6, Czech Republic aut Kroulík Milan Faculty of Engineering, Department of Agricultural Machines, Czech University of Life Sciences Prague, Kamýcká 129, Suchdol, 165 21, Prague 6, Czech Republic aut Matějková Štěpánka Crop Research Institute, Drnovská 507, Ruzyně, 161 06, Prague 6, Czech Republic aut Precision Agriculture Springer US; http://www.springer-ny.com 12/6(2011-12-01), 813-830 1385-2256 12:6<813 2011 12 11119 https://doi.org/10.1007/s11119-011-9221-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11119-011-9221-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kumhálová Jitka Crop Research Institute, Drnovská 507, Ruzyně, 161 06, Prague 6, Czech Republic aut NATIONALLICENCE 700 1- Kumhála František Faculty of Engineering, Department of Agricultural Machines, Czech University of Life Sciences Prague, Kamýcká 129, Suchdol, 165 21, Prague 6, Czech Republic aut NATIONALLICENCE 700 1- Kroulík Milan Faculty of Engineering, Department of Agricultural Machines, Czech University of Life Sciences Prague, Kamýcká 129, Suchdol, 165 21, Prague 6, Czech Republic aut NATIONALLICENCE 700 1- Matějková Štěpánka Crop Research Institute, Drnovská 507, Ruzyně, 161 06, Prague 6, Czech Republic aut NATIONALLICENCE 773 0- Precision Agriculture Springer US; http://www.springer-ny.com 12/6(2011-12-01), 813-830 1385-2256 12:6<813 2011 12 11119 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer