Nayan Ahmed

Mapping Spatial Variation of Soil Carbon Concentration and Assessment of Carbon Stocks in an Agricultural Farm of Semiarid Region of India

Tapan Gorai, Nayan Ahmed, Sankar Kumar Mahapatra, Rabi Narayan Sahoo & Priyabrata Santra · International Journal of Environment and Climate Change · 2025

Soil carbon is a major indicator for sustainability of agricultural productivity and crucial for climate change studies. Spatial modeling and prediction map of surface soil (0.0 -0.15 m) carbon concentration in a semiarid agricultural farm, New Delhi, India was generated using ge...

Open access Research Article 10.9734/ijecc/2025/v15i105079

Role of Clay-humus Complexes in Soil Organic Carbon Stabilization Across Paddy Soils in Diverse Indian Soil Orders

Kavitha P Jadhav, Nayan Ahmed, Tapan Jyoti Purakayastha, Debasis Golui, Ruma Das, Mahesh Chand Meena, Manoj Shrivastava, Rajeev Ranjan & Pooja Tamuk · International Journal of Plant & Soil Science · 2024

Aims: This study investigates the mechanisms of soil organic carbon (SOC) stabilization within clay-humus complexes across diverse soil orders in Indian paddy soils. By employing FTIR spectroscopy and NaOCl oxidation, it examines how different clay mineral compositions, such as s...

Open access Research Article 10.9734/ijpss/2024/v36i115168

Predictive Mapping of Soil Micronutrients Using Geographic Information System for Site Specific Management Interventions in a Semiarid Farm, India

Tapan Gorai, Nayan Ahmed & Rabi Narayan Sahoo · International Journal of Plant & Soil Science · 2024

Deficiency of soil micronutrients has an adverse impact on crop productivity in intensive agriculture. Plant availability, spatial pattern and distribution of soil micronutrients such as iron (Fe), manganese (Mn), zinc (Zn) and copper (Cu) content in surface soils were evaluated...

Open access Research Article 10.9734/ijpss/2024/v36i74798

Farm-Scale Mapping of Soil Microbiological Indicators Using Geostatistical Technique

Tapan Gorai, Nayan Ahmed & Rabi Narayan Sahoo · International Journal of Environment and Climate Change · 2023

Soil microbiological properties viz. soil microbial biomass carbon (MBC) and dehydrogenase activity (DHA) are sensitive soil quality indicators. Spatial modeling and prediction map of soil MBC and DHA were generated for a semiarid agricultural farm, New Delhi, India from 288 geo-...

Open access Research Article 10.9734/ijecc/2023/v13i113296

Farm-scale Mapping of Soil Phosphorus and Potassium Fractions Using Geostatistical Technique

Tapan Gorai, Nayan Ahmed & Rabi Narayan Sahoo · International Journal of Plant & Soil Science · 2022

Phosphorus (P) and potassium (K) are two major nutrients for agricultural productivity and sustainability. The spatial variability maps of soil phosphorus and potassium content in surfacesoils collected through grid sampling technique were developed using geo-spatial technology f...

Open access Research Article 10.9734/ijpss/2022/v34i232541

FTIR Spectroscopy and Optical Density Characterization of Humic Substances Extracted from Reclaimed Alkali Soils under Different Tillage and Management Practices

Shiva N. Suman, Nayan Ahmed, Vipin Kumar, Samar C. Datta, K. M. Manjaiah, Rajesh Kumar, Vandana Kumari, Ranjan Laik & T. K. Das · Current Journal of Applied Science and Technology · 2020

In the present investigation, different tillage and management practices interventions were assessed to note the changes in the composition of humic substances using Fourier transform infrared (FTIR) techniques, optical density (E4/E6) measurement and elemental composition of hum...

Open access Research Article 10.9734/cjast/2020/v39i3731083