Abstract The present study comprehensively assessed soil site suitability for selected winter crops in the coastal saline agro-ecological environment of Sagar Island, India by integrating land limitation and crop suitability evaluation framework of FAO. Soil properties (e.g. texture, pH, organic carbon; SOC, electrical conductivity; EC and available macronutrients- NPK) were obtained through extensive grid based (size: 1 km by 1 km) soil sampling and estimation in the laboratory following standard procedures. Geo-statistical and visualization methods were applied to match the suitability for selected crops based on their essential soil quality requirements. The weights of the soil parameters have been assigned through PCA analysis, based on the relative importance of soil properties sensitive to crop specific growth and development. The inverse distance weighting (IDW) interpolation and reclassification methods were adopted for generation of spatial layers of those soil properties. Results revealed that, nearly 61% of the geographical area (14618 ha GA) of the Island is under agricultural landuse (AL), mostly dominated by lowland rice-fallow based mono-cropping system (76% of AL) followed by rice-rice double cropping (in 14.8% AL). Soil suitability analysis for growing winter crops within agricultural area revealed that 38.4% (5607 ha) of AL is highly suitable (S1) for sunflower, 11.9% of AL (1739 ha) for chilli, 6.8% (987 ha) of AL for potato and only 1% (150 ha) of AL is considered to be highly suitable for mustard crop cultivation. However, the predominant fine textured soils of the Island falls under moderately suitable (S2) category for growing chilli (85.1% of AL), mustard (64.6% of AL), sunflower (55.7% of AL) and potato (53.0% of AL) crops. More than one third of the soils within the agricultural landuse were found not optimum for growing potato, sunflower and mustard. Findings from the study can be harnessed in increasing crop area diversification and intensification with appropriate irrigation and crop management practices in Sagar Island and similar such coastal Islands.

中文翻译：

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使用地理统计和可视化技术对印度萨加尔岛选定的冬季作物进行土壤场地适宜性分析

摘要 本研究通过整合粮农组织的土地限制和作物适宜性评估框架，综合评估了印度萨加尔岛沿海盐渍农业生态环境中选定冬季作物的土壤立地适宜性。土壤特性（例如质地、pH 值、有机碳；SOC、电导率；EC 和可用常量营养素 - NPK）通过广泛的基于网格（大小：1 公里乘 1 公里）的土壤采样和实验室中的标准程序估算获得。应用地理统计和可视化方法，根据所选作物的基本土壤质量要求来匹配其适宜性。基于对作物特定生长和发育敏感的土壤特性的相对重要性，通过 PCA 分析分配了土壤参数的权重。采用反距离加权（IDW）插值和重分类方法生成这些土壤特性的空间层。结果显示，该岛近 61% 的地理区域（14618 公顷 GA）处于农业用地（AL）之下，主要以低地水稻休耕为主的单一种植系统（AL 的 76%）其次是稻米双重裁剪（14.8% AL）。农业区域内冬季作物生长的土壤适宜性分析显示，38.4%（5607 公顷）的 AL 高度适合（S1）向日葵，11.9% 的 AL（1739 公顷）高度适合辣椒，6.8%（987 公顷）的 AL 高度适合马铃薯只有 1%（150 公顷）的 AL 被认为非常适合芥菜作物种植。然而，岛上主要的细质地土壤属于中等适宜 (S2) 类别，适合种植辣椒（AL 的 85.1%），芥菜（AL 的 64.6%）、向日葵（AL 的 55.7%）和马铃薯（AL 的 53.0%）作物。发现农业用地中超过三分之一的土壤不适合种植马铃薯、向日葵和芥菜。该研究的结果可用于在萨加尔岛和类似的沿海岛屿通过适当的灌溉和作物管理实践来增加作物面积的多样化和集约化。