The factors are;
1) high inflation, Germany then experienced a hyperinflation in 1923, prices doubled every two days.
2) Loss of life and property damage from the war, he social and political consequences were devastating. The people no longer trusted the government. Many of them lost their lifetime savings. Only the owners of real estate and factories benefited from this radical cut.
3) inability to pay back debts, Most peasants on the periphery depended on the market and on credit for their operations. In order to pay rent and/or land revenue, and to service their debts, peasants had to sell part of their agricultural produce.