Penilaian Kandungan Fosfor dan Bahan Organik Tanah Pada Areal Pertanaman Bawang Merah Di Desa Tongging Kecamatan Merek Kabupaten Karo

Abstract

Shallots have a high economic value, including vegetable commodities that are most in demand by the community, especially in North Sumatra. Tongging village in Tongging Village is a shallot production area in North Sumatra but has poor soil chemistry due to leaching in the soil. Fertilization and organic matter application can be done to increase shallot production. The study aimed to assess the content of phosphorus and soil organic matter and production in shallot planting areas in Tongging Village, Merek Subdistrict, Karo Regency, from August 2024 to October 2024. The method used was a quantitative and qualitative descriptive survey. Soil sampling using purposive sampling technique: Soil samples were taken from as many as 30 samples with a depth of 0-20 cm, and questionnaires and interviews were circulated to respondent farmers. The results showed that soil P-total was 0.03-0.1%, and 46% of shallot farmers' land had a Ptotal between 0.08-0.10%. Soil C-organic content was 0.64-2.54%, and 60% of the farmers' land had low C-organic content. Onion production ranges from 0.625- 16.7 tons/ha with an average of 7.63 tons/ha, which is lower than the national production of 10.93 tons/ha.