Paper Title
Correlation of Flower Taxation and Productivity Robusta Coffee (Coffea Canephora) Against Rainfall

Abstract
Robusta coffee (Coffeacanephora), is one of the important export commodities of the plantation. Indonesia is ranked 4th in the country that produces the largest coffee production in the world, which is 635,000 tons / year worth 8% of world coffee production with a composition of 72.84% is robusta coffee. Distribution of rainfall is more important than the amount of rain per year for flower primordia formation, floration, and pollination. The purpose of this study was to determine the relationship between: 1) rainfall and rainy days with the amount of coffee flowers, 2) rainfall and rainy days with the productivity of coffee fruit, and 3) the amount of interest with the productivity of coffee fruit. This research was conducted in 7 coffee gardens in the PTPN XII plantation area in East Java. This research was conducted using secondary data including: realization of coffee productivity, amount of coffee interest, and data on the amount of rainfall and rainy days from 7 robusta coffee plantations in the PTPN XII plantation area in East Java. The data used in this study are data from the last 10 years from 2005 to 2017. The results of the study show that the correlation between the number of flowers and the productivity of coffee fruit has a very significant correlation, with a p-value of 0,000 Keywords - Distribution, export commodities, floration, pollination. .