Exploring correlation between vegetation indices and plant nitrogen uptake

Site: Oensingen (CH-OE2, canton Solothurn, Switzerland) is located at the southern edge of the bottom of the Jura Mountains. The site is managed as a typical intensive crop rotation under the Swiss Integrated Pest Management regime (IP Suisse).; Longitude (WGS 84): 7°44'01.5" E; Latitude (WGS 84): 47°17'11.1" N; Altitude (m.a.s.l): 452; Land cover (IGBP land classification): Cropland; Soil type: Eutri-stagnic cambisol (FAO, ISRIC and ISSS, 1998. World Reference Base for Soil Resources.); Geology: Alpine lime (50%), jurassic lime (15%), silicon dioxide (15%), conglomerates and crystalline rock (15%) (after: Mühlberg und Niggli, 1913, Geologischer Atlas der Schweiz GAS, 2003).