Observation of microclimate diurnal change and successful rate of robusta coffee (

\nObservation of diurnal change of microclimate conditions in a robusta coffee plantation in Malang, East Java, Indonesia, was conducted from September to November 2023. The observation was done in two different blocks, Block 1 and Block 2 with 35 years and 89 years plants, respectively. The diurnal microclimate data observed were ambient air temperature, air humidity, light intensity, and solar radiation. The data on the successful rate of flower-to-fruit formation was also analyzed. The vegetation in Block 1 has higher diurnal light intensity and solar radiation than in Block 2. The coffee plants grown in Blocks 1 and 2 have a 56% and 50% success rate of flower-tofruit formation, respectively\n