Carbon stock in and Carbon fluxes at mineral soil arable lands in Finland
Carbon in agricultural fields belongs to the most topical research sectors for climate change in 2020s. Carbon husbandry is searching for new methods how to increase the Carbon stock in the soil. Also perennial crops and agroforestry methods have become more topical, like possibility of willow husbandry in new era farms (Picture 1). Picture 1. Annual and perennial crop blocks in the agriculture Carbon in agricultural fields, in arable lands has been measured by the Natural Resource Institute Finland (Luke) in a comparative manner, in several hundreds sample plots, by repeating four times, since 1987 (ref 1). The basic measurements have been done for the content of elementary Carbon in dry soil (g C/kg). The measurements cover three soil classes: mineral soil, mull soil and peat soil. The classification is based on the share of dry weight organic (humus) soil in the total soil dry weight. In mineral soil the organic share is less than 20 per cent. In mull soil the share is between 20 -