Browsing by Subject "ominaislämpökapasiteetti"

The purpose of tillage is to mulch previous years crop residue and create suitable seedbed for the crop. Tillage can also affect soil temperature properties. Soil temperature affects how fast the seed germinates in soil, how the roots develop, and the microbiological activity of the soil. This study compared the effects of traditional autumn ploughing, autumn chisel plough and zero tillage on soil temperature and moisture content. The project was conducted as a part of Maa- ja vesitekniikan tuki -funded TALMA project, which was carried out in collaboration with MTT. The field experiments and measurements of this study were carried out in Jokioinen at MTT during the period of 1 June 2012 to 06 May 2013. Soil temperature and moisture content were measured continuously at the depth of 10 cm by using one hour measurement frequency. The hypotheses of this research were as follows: Firstly, that the autumn tilled soil warms faster than stubble-covered field. The second hypothesis states, that temperature variation of autumn tilled land is greater than variation of untilled land. Warming of the soil during spring term was compared by setting a target temperature for the ground (+5°C). All tillage treatments reached target temperature within one day. The results demonstrated that the average day temperature of ploughed land was a little colder than stubble covered land in spring. Also the variation of the soil minimum and maximum temperature values was higher in ploughed soil. Based on the results stubble covered land buffers better temperature variation than ploughed land. Stubble covered land does not cool as much as ploughed land during the winter.