Differences Of Earthworm Biomass And Analysis Of N, P, K, C-Organic Levels In Palm Oil Plantation Land

Earthworm (Lumbricus sp.) is a biomass of soil organisms that has important agroecological functions because it can affect the dynamics of organic matter and soil structure.This study aims to determine differences in earthworm biomass and analyze the levels of nutrients nitrogen (N), phosphorus (P), potassium (K), C-organic in the immature (IM) and mature (M) oil palm plantations belonging to the people of Salang Tungir Village, Namorambe District.The method used is descriptive analytic method by laying the plots randomly and taking samples from the plots in a saturated manner.The parameters observed were nutrients N, P, K, C-organic soil, soil texture, pH, humidity, water content, and earthworm biomass.Observational data were analyzed using the T statistical test with a significance level of 95%.The results showed that the biomass of the earthworm population in the IM oil palm plantation area was significantly different from the biomass of the earthworm population in the M oil palm plantation.The higher earthworm population biomass of 25.13 g/plot was found in IM.Nutrient content of type P was found to be higher than that of N, K, and C-organic in the IM and M oil palm plantations.Immature oil palm plantation soil dominates with a sandy texture with a neutral pH containing earthworm population biomass and higher levels of phosphorus than mature.