Ten potato based cropping systems with 300% cropping intensity were evaluated at the Central Potato Research Station, Jalandhar during 1995–1998. The results showed that groundnut-potato-onion was the best crop sequence with the potato equivalent yield (PEY) of 996 q/ha followed by blackgram-potato-radish (810 q/ha of PEY). Onion and radish after potato (cv. Kufri Chandramukhi) performed well whereas groundnut performed well in kharif as its pod yield varied from 26 to 28 q/ha. Groundnut-potato-onion and blackgram-potato-radish were also more remunerative than paddy-potato-sunflower and other systems. Groundnut-potato-onion system had highest land use efficency (90%) whereas blackgram-potato-radish had highest biological and production efficiency of 313 and 316 kg/day/ha, respectively. The soil analysis after three years showed that the groundnut-potato-onion system maintained higher availability of nutrients especially of P than the paddy-potato-sunflower system. However, the pH of soil was higher where paddy was included in the kharif season. The organic carbon status of soil was reduced by 7.5% where cv. Kufri Badshah was grown in place of Kufri Chandramukhi. The availability of N, P and K in soil was positively associated with the quantity of these nutrients applied to the soil. Major portion of applied P was converted to calcium phosphate.
