@Emilian kilumile, best results in agricultural production potatoes included depend on various factors which include:-
-Ensure region you want to do the farming is climatically conducive for potatoes( temperature and rainfall )
- soils should be deep and fertile sandy loam ( well drained and aerated)
-Consider checking on soil PH.
-Prepare land early
-Ensure you have enough inputs at the right time
- plant certified and high yielding seed variety
- Observe correct spacing when planting
- keep the field weed, diseases and pest free
-Always seek advice when in doubt and you've noted a problem to be sorted ( this you can do through neighboring experienced farmer, local extension officer or just post your questions here and we shall advice approximately.
Thanks