caa a22 4500 445864281 CHVBK 20180317145453.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s11119-009-9154-9 doi (NATIONALLICENCE)springer-10.1007/s11119-009-9154-9 The management and planning of citrus orchards at a regional scale with GIS [Elektronische Daten] [Wei Wu, Hong-Bin Liu, Heng-Lin Dai, Wei Li, Peng-Shou Sun] Citrus growing is regarded as an important cash crop in some regions of China. A geographic information system (GIS) was used to investigate the growing conditions of citrus orchards in Chongqing, China. Digital maps on topography, land use, soil types and climate were obtained and a digital elevation model (DEM) was produced at a scale of 1:10000 using a GIS. A total of 50 representative orchards (2032ha) were examined and extensive investigation were carried out in the summer of 2007. Topographic characteristics of the orchards studied were determined using the DEM. About 53% of the total area covered by the orchards has slopes of 8-25° and 4.4% has slopes steeper than 35°. The orchards were dominantly on south-facing slopes (42%). About 80% of the orchards were within 200-400m in altitude. The orchards were mainly on soil developed on purple shale and limestone (86 and 14% of the total area, respectively). About 42% of the area has soil with a pH of less than 5.5. The majority of the study area (60%) has soil with organic matter contents of 1-2%. General guidelines for sustainable citrus production are proposed based on the topography and soil properties of the citrus orchards. The result of regional planning indicates that about one-third of the total area of Chongqing is suitable for citrus growth (2.68×106ha). A GIS-based database management system provides a new perspective on the management and planning of citrus orchards in Chongqing. Springer Science+Business Media, LLC, 2009 Spatial database nationallicence Regional scale nationallicence Precision management nationallicence Growth conditions nationallicence Sustainable management nationallicence Wu Wei College of Computer and Information Science, Southwest University, 400716, Chongqing, China aut Liu Hong-Bin College of Resources and Environment, Southwest University, 400716, Chongqing, China aut Dai Heng-Lin Chongqing Agriculture Bureau, 400015, Chongqing, China aut Li Wei Chongqing Agriculture Bureau, 400015, Chongqing, China aut Sun Peng-Shou Chongqing Agriculture Bureau, 400015, Chongqing, China aut Precision Agriculture Springer US; http://www.springer-ny.com 12/1(2011-02-01), 44-54 1385-2256 12:1<44 2011 12 11119 https://doi.org/10.1007/s11119-009-9154-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11119-009-9154-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wu Wei College of Computer and Information Science, Southwest University, 400716, Chongqing, China aut NATIONALLICENCE 700 1- Liu Hong-Bin College of Resources and Environment, Southwest University, 400716, Chongqing, China aut NATIONALLICENCE 700 1- Dai Heng-Lin Chongqing Agriculture Bureau, 400015, Chongqing, China aut NATIONALLICENCE 700 1- Li Wei Chongqing Agriculture Bureau, 400015, Chongqing, China aut NATIONALLICENCE 700 1- Sun Peng-Shou Chongqing Agriculture Bureau, 400015, Chongqing, China aut NATIONALLICENCE 773 0- Precision Agriculture Springer US; http://www.springer-ny.com 12/1(2011-02-01), 44-54 1385-2256 12:1<44 2011 12 11119 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer