Author(s): Effect of Salvinia molesta on soil fertility and yield of soybean in acid Alfisol soil

Abstract: An experiment was conducted in the research field of the department of Soil Science, Birsa Agricultural University, Ranchi, Jharkhand, during 2019 with the aim of solving the pressure on fertilizer and global environmental issues. There were nine treatments during the Rabi season as T₁: RDF, T₂­: 50% RDF, T₃: Salvinia @ 1 t/ha, T₄: Salvinia @ 2 t/ha, T₅: Salvinia @ 4 t/ha, T₆: Salvinia @ 1 t/ha + 50% RDF, T₇: Salvinia @ 2 t/ha + 50%RDF, T₈: Salvinia@4t/ha + 50% RDF, T₉: Absolute control. Whereas, during Kharif season, Salvilnia was not incorporated in soybean crop and only fertilizer treatments were applied. As per the observation of the data it was observed that, the treatment T₁: RDF yielded maximum grain but remained at par to the treatments T₇ and T₈. Thus it has been proved that T₇ and T₈ were equally beneficial to the RDF in producing higher grain in acid Alfisol soil. Available N, P₂O₅ and K₂O were found significantly higher in the treatment where Salvinia@4t/ha + 50% RDF was applied (T₈) and the values were 235.72 kg/ha, 39.75 kg/ha and 253.12 kg/ha respectively. Soil organic carbon content was also found maximum under the treatment T₈: Salvinia @ 4t/ha + 50% RDF compared to the other treatments and was significant over other treatments (T₁ & T₂).

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