Journal article
Permanent soil monitoring sites for documentation of soil fertility development after changing from conventional to organic farming.

Publication Details
Quintern, M.; Jörgensen, R.; Wildhagen, H.
Publication year:
Journal of Plant Nutrition and Soil Science
Pages range:
Journal acronym:
J Plant Nutr Soil Sc
Volume number:

For monitoring soil fertility after changing farm management from highly conventional to organic farming on the newly established research farm of Kassel University, two permanent-soil monitoring sites were installed in 1999. Representative locations for installing the permanent-soil monitoring sites were selected using geographical information systems (GIS), based on available data from geology, topography, soil taxation, land use, and intensive auger-borehole records and analysis with a very high spatial resolution of data. The soils are represented by a Luvisol derived from loess and a Vertisol developed from claystone. The soil properties of the two monitoring sites measured immediately after changing to organic farming showed high contents of extractable nutrients as a result of the former intensive fertilization practice during conventional farm management. The microbial soil properties of the two monitoring sites were in the medium range of regional soils. A first evaluation of the development of soil properties was done after 5 y of monitoring. The soil organic-matter content increased slightly after grass-clover and after application of farmyard manure. The amounts of K and P decreased clearly at the loess site without application of farmyard manure. At the clay site, the unique application of farmyard manure led to increasing contents of extractable K and P in the top soil. The variation of soil properties increased clearly after perennial crops like grass-clover and in years after application of farmyard manure.

Last updated on 2019-01-11 at 16:05