Topography and vegetation have a significant role in soil development in different ecosystems. Interactions between soil and landforms help to understand the pedogenic processes and soil variability. The present study assessed the impact of various landforms and vegetation on pedological variability along the toposequence of the eastern coastal plain. We characterized 46 soil profiles from five landforms, viz., foothills, upland, alluvial plains, coastal plains, and sandbars and performed factor analysis. The frequency distribution of the soil properties was significantly skewed with each other’s. Soils are classified into three orders: Alfisols, Inceptisols, and Entisols from hills to sandbars. The soils were characterized by clay (2.50–65.8%), AWC (4.0–28.0%), pH (5.40–9.40), EC (0.03–5.60 dSm⁻¹), OC (0.01–1.13%), CEC (1.0-31.60 cmol (p⁺) kg⁻¹), BS (57–95%) and ESP (0.54–27.8%). Whereas alluvial plain soils are rich in clay and organic carbon, foothill and upland soils experience severe to moderate soil erosion, leading to the leaching of basic cations. Coastal plains face regular seawater intrusion and flooding, causing excess deposition of salts, which alter the soil pedogenic process under different landforms and land use. Soil pH, EC, clay, CEC and ESP significantly influenced the paddy yield in alluvial and coastal plains landforms. Development of landform and soil relationships concerning land uses in coastal regions helps to identify factors involved in soil development, pedogenic processes and crop productivity.

地形和植被对不同生态系统的土壤发育具有重要作用。土壤和地貌之间的相互作用有助于了解成土过程和土壤变化。本研究评估了各种地形和植被对东部沿海平原地形序列土壤变异的影响。我们对来自五种地貌（即山麓、高地、冲积平原、沿海平原和沙洲）的 46 个土壤剖面进行了特征分析，并进行了因子分析。土壤特性的频率分布彼此之间显着偏斜。从山丘到沙洲，土壤分为三个目：Alfisols、Inceptisols 和 Entisols。土壤的特征为粘土 (2.50–65.8%)、AWC (4.0–28.0%)、pH (5.40–9.40)、EC (0.03–5.60 dSm ⁻¹ )、OC (0.01–1.13%)、CEC (1.0- 31.60 cmol (p ⁺ ) kg ⁻¹ )，BS (57–95%) 和 ESP (0.54–27.8%)。冲积平原土壤富含粘土和有机碳，而山麓和高地土壤则遭受严重至中度的土壤侵蚀，导致碱性阳离子的淋滤。沿海平原经常面临海水入侵和洪水泛滥，导致盐分过量沉积，从而改变不同地貌和土地利用下的土壤成土过程。冲积平原和滨海平原地貌土壤pH、EC、粘土、CEC和ESP显着影响水稻产量。沿海地区土地利用的地形和土壤关系的发展有助于确定与土壤发育、成土过程和作物生产力有关的因素。