Pengaruh Curah Hujan dan Hari Hujan terhadap Produktivitas Tanaman Gambir (Uncaria gambir Roxb.) di Kecamatan Salak Kabupaten Pakpak Bharat Provinsi Sumatera Utara

Abstract

Gambier productivity is influenced by several factors, one of which is rainfall and rainy dayss. This reseachs is taims to determine the effect of rainfall and rainy days on the productivity of gambier plants (Uncaria gambir Roxb.). The hypothesis in this research is that there is a real influence of rainfall and rainy days on gambier productivit. This research was carried out from May to July 2024 at an altitude of 933 meters above sea level, data collection methods were carried out using field surveys and secondary data collection at related agencies. The data taken includes rainfall and rainy days and productivity gambie from 2018-2022. The analysis method used is multiple linear regression analysis and correlation analysis using the SPSS.v.22 for Windows statistical tool. The results of the regression analysis show that rainfall and rainy days have a insignificant effect simultaneously on increasing gambier production. The correlation of rainfall,rainy days, ongambier plants has a fairly weak influence on theinterpretation of the r value in achieving gambier productivity.