Time
of application
Potato plant needs P at early
stages of development thus its application at planting is recommended. Like P, application of K at planting time in furrows has been found to
be better than its application above or below seed tubers or broadcasting in
hill soils. In ware potato crop, split application of K i.e. half at planting and
half at earthing up alongwith N has a positive effect on the yield of large
tubers. Foliar application of K is done, then 2 per cent
KCl at 50 or 70 days after planting has been found quite effective in
Kufri Badshah in northern plains and helped in saving in K dose by 40 kg K2O/ha.