HighlightsConservation agriculture (CA) practice meaningfully stabilized organic carbon (OC) upto lower depth of soil.Crop intensification with nutrient exhaustive crops lowers OC stabilization in soil even after adoption of CA practice.Farmers practice of growing rice and wheat produce less yield with less storage of carbon in soil.Rice-wheat-legume crop with CA proved as most efficient in terms of crop yield, soil health and carbon sequestration.
A field experiment was conducted during the Rabi season of the year 2017-18 on potato with variety Kufri Ashoka to test the recommended dose of fertilizers (RDF) levels (0, 50, 75, 100, 125, 150%) with two organic manures (vermicompost 5 t/ha and mustard oil cake 2.5 t/ha) at research farm of Tirhut college of Agriculture Dholi, Muzaffarpur, Bihar. The experiment was carried out in randomized block design (RBD) with twelve treatments and replicated thrice. The soil of experimental plot was Entisols, sandy loam in texture under low available in N, P and K with pH 8.3. Among the yield, nutrient uptake and available nutrient in soil after harvesting of potato were recorded higher with the application of treatment T11 -150% RDF + 5.0 t/ha vermicompost which was significantly superior over T1 -absolute control, T2 -100% RDF, T3 -50% RDF + 5.0 t/ha vermicompost, T4 -50% RDF + 2.5 t/ha mustard oil cake, T5 -75% RDF + 5.0 t/ha vermicompost and T6 -75% RDF + 2.5 t/ha mustard oil cake but was statistically at par with treatments, T7 -100% RDF + 5.0 t/ha vermicompost, T8 -100% RDF + 2.5 t/ha mustard oil cake, T9 -125% RDF + 5.0 t/ha vermicompost, T10 -125% RDF + 2.5 t/ha mustard oil cake and T12 -150% RDF + 2.5 t/ha mustard oil cake.
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