Precipitation impact on cassava yield in Indonesia

Abstract

Cassava is one of the food crop commodities as a producer of carbohydrates which is cultivated on dry land. Cultivation in dry land is directly related to changes in precipitation. Indonesia has three different types of precipitation; equatorial type, monsoon type, and local type. This study aims to examine the effect of precipitation on cassava production based on the type of precipitation. The selected locations include 7 provinces consisting of North Sumatra, West Kalimantan and Central Sulawesi as representatives of equatorial precipitation types, East Java, South Sulawesi and West Kalimantan provinces as representatives of monsoon precipitation types; and Maluku Province representing the local type. Secondary data was used to include production, land yield, and precipitation. Data were analyzed using panel regression and one-way anova test. The results showed that precipitation had a significant effect on cassava production in the three precipitation types. The average change in precipitation that occurs in the local area is significantly different from the average change in cassava production in the monsoon and equatorial types. Meanwhile, the average change in cassava production in the monsoon region was not significantly different from the average change in cassava production in the equatorial types.