1Central Potato Research Station, Shillong-793009, Meghalaya, India
2Central Potato Research Institute, Shimla-171001, HP, India
In a field study conducted at Shillong during 2003 and 2004 with poultry manure in combination with inorganic fertilizers, the maximum tuber yield (236 q/ha) was recorded with the application of 100% inorganic fertilizers. The application of 25% poultry manure along with 75% inorganic fertilizers gave tuber yield of 228 q/ha which was at par with 100% inorganic fertilizer treatments, suggesting that 25% inorganic fertilizers may be substituted with poultry manure as organic source without any significant loss in tuber yield. The yield of medium sized (30–50 g) tubers improved with the increasing dose of poultry manure in combination with inorganic fertilizers.
