According to the old Estonian folk calendar, April 14 is considered künnipäev / ploughing day. Traditionally on this day farmers wake up early as possible and start checking that all the farming equipment is in working order and ready for use. Then they would take a load of manure to the field and tend to the soil in hope of a good harvest.
Every year in Estonia there is an annual ploughing championship. The next one is scheduled to take place in September. There is also a World Ploughing Championship and this year it will be held in Tartu to mark the 150th anniversary of Estonia's first ploughing competition. More information about the event can be found here.