For Sharecropping : The slaveholders allowed the former slaves to use their land for agricultural purpose and in exchange received a percentage of the produce
For Tenant farming : The former slaveholders provided their lands and some operating capital to the former slaves for use and in exchange received a percentage of the produce.
For Debt peonage : The former slaves paid off their debt to the former slaveholders through work
These systems of Labor are applicable in farming, because former slaveholders needed labor and former slaves needed work, the slaves provided the needed labor in exchange for food and profit, while the slaveholders provided the needed work through land and capital in exchange for a percentage of the produce
Hence we can conclude that the answer to your question are as listed above.
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