1Department of Soil Science, School of Agricultural Sciences, Nagaland University, Medziphema-797 106, Nagaland, India
*Corresponding Author: Temsusangla I. Jamir, Department of Soil Science, School of Agricultural Sciences, Nagaland University, Medziphema-797 106, Nagaland, India, Email: asangjamir577@gmail.com
Online Published on 03 November, 2025.
Nutrient availability is impaired by soil acidity limiting its accessibility to plants especially phosphorus get immobilized by Fe3+ and Al3+ in acid soil, thereby, resulting in poor growth, seed development and yield. Liming is an imperative soil management practices to keep in check the soil acidity-induced fertility constraints, along with integrated use of fertilizers and organic fertilizers.
The experiment consist of four soil amendments levels [SA0 (control), SA1 (5% LR), SA2 (PSB) and SA3 (5% LR+PSB)] and four phosphorus levels (0, 20, 40 and 60 kg P2O5 ha-1) laid out in randomized block design with three replications. Lime (CaCO3) was applied in furrows 10 days prior to sowing and seed was treated with PSB a day before sowing. Phosphorus levels and the recommended dose of nitrogen and potassium were applied as basal.
SA3 (5% LR?PSB) significantly increased the seed yield by 29.9% and stover yield by 35.7% over control. Among P levels application of 60 kg P2O5 ha-1 significantly increased the seed and stover yield and was found highest over preceding P levels but was found at par with P40; application of 40 kg P2O5 ha-1 increased the seed yield by 44.9% and stover yield by 55.9% over control. Interaction effect of soil amendments and phosphorus was significant on seed and stover yieldand nutrient uptake. Phosphorus use efficiency (PUE) decreased with increase in phosphorus levels while P uptake efficiency (PUPE), fertilizer P uptake efficiency (FPUPE), fertilizer P utilization efficiency (FPUTE) and fertilizer P use efficiency (FPUE) were highest at P40.
Black gram, Phosphorus, Soil amendments, Yield
