Evaluation of Lowland Paddy Soil Fertility for Agricultural Production in Semangga District, Merauke Regency
Parjono Parjono1, Mega Ayu Yusuf1

Department of Agriculturual Engineering, Faculty of Agriculture, Universitas Musamus, Merauke, Indonesia

Abstract

Evaluation of soil fertility in lowland paddy fields in Semangga District, Merauke Regency aims to evaluate the status of macro and micro nutrients in paddy soil. A decrease in soil fertility has an impact on decreasing crop productivity and increasing the cost of agricultural production. The research sites consist of peatland (Marga Mulya and Waninggap Kai village), alluvial (Kuper, Kuprik, Sidomulyo, Semangga Jaya, Muram Sari, half of Marga Mulya, Waninggap Kai, and Matara village), and marine (Waninggap Nanggo and Urumb village). Disturbed soil samples were taken collectively based on the administrative map overlay, land use and soil landform of the Semangga District, so that it was divided into 4 collection points, namely: A (Waninggap Nanggo, Urumb and Matara village), B (Sidomulyo, Kuper, Kuprik, Semangga Jaya, and Marga Mulya village), C (Muram Sari and Matara village), and D (Waninggap Kai and Marga Mulya village). Parameters for chemical analysis and soil fertility were C-organic, soil pH, and macronutrients (N, P, and K). The results showed that at location A the soil pH was moderately alkaline around 7.61, C-organic was classified as low 1.19%, N-total was classified as low around 0.11%, available P2O5 and K+ was classified as low around 8.65 mg/kg and 0.28 cmol/kg. Location B, pH is classified as acidic, 4.42, C-organic is classified as very high, around 6.30%, N-total is classified as moderate, around 0.45%, but P2O5 is available and K+ is classified as moderate, around 11.12 mg/kg and 0. 59 cmol/kg. At location C, the soil pH was classified as acidic, 4.75, C-organic was classified as high, 4.11%, N-total and K+ were classified as moderate, around 0.35% and 0.47 cmol/kg, while the available P2O5 content was classified as very low, around 1 .20 mg/kg. At location D the soil pH was classified as acidic 4.99, C-organic was classified as moderate around 2.87%, N-total was classified as low around 0.19%, available P2O5 was classified as very low around 2.94 mg/kg, and the K+ content was classified as is around 0.45 cmol/kg.

Keywords: Lowland, Paddy soil, Soil fertility, Soil nutrients

Topic: Agriculture Productivity