Rainfall variability and yield gap analysis of rice (Oryza sativa L.) At western Uttar Pradesh in relation to crop planning and Management

The daily rainfall data for the period of 1992 to 2011 of Western U.P. was analyzed to variability of rainfall. Trends and variability for monsoon months show maximum, number of rainy days and length of monsoon season affected the productivity of rainfed rice. Analysis of monthly rainfall data suggests that when the quantum of rainfall during the monsoon months was close to its normal value the low production of rice can be attributed to the moisture stress during vegetative and reproductive stage of rice crop. This study provides help to former for enhancing the production and productivity of rice.