When and where was this contract written? sharecropping

The freedmen, who wanted autonomy and independence, refused to sign contracts that required gang labor, and sharecropping emerged as a compromise. ... In exchange for the use of land, a cabin, and supplies, sharecroppers agreed to raise a cash crop and give a portion, usually 50 percent, of the crop to their landlord

answer; i do believe that the (14th)fourteenth amendment is the correct answer