Question: farmer want to know information about collection of soil sample for soil testing?
Answer: recommended for  aside from dib hole clean from top to bottom 2 cm thick clay clean bucket or tray and put in the bottom to take out. collected the soil by hand, mix thoroughly and put on clean clothes pile , make a goal . different finger to remove dirt from the pile of four equal parts . now the remaining two parts of the soil again to mix well and set goals . this process is then repeated until almost half forts top soil remains . the representative samples.