Select any criterion card to explore its rationale, assessment method, and supporting references.
A systematic evaluation of large-area agricultural potential based on FAO Land Evaluation Guidelines, adapted to the Tihama coastal plain and Hejaz mountain context.
Select any criterion card to explore its rationale, assessment method, and supporting references.
Weight Settings — Adjust the relative importance of each category and its elements. Category weights must sum to 100%. Element weights within each category must also sum to 100%. Changes reflect immediately across the criteria view.
FAO Suitability Classification (S1–N2) — Enter field assessment scores (1–5) for each element using the Lookup Values tab as reference. The system computes the weighted parametric score per category and overall, then converts to the formal FAO S1/S2/S3/N1/N2 class notation per FAO Soils Bulletin No. 32 and Bulletin No. 55.
Limiting factor rule: Any element with priority = Critical scoring 1 automatically triggers N2 regardless of overall score — a permanent exclusion.
Lookup Values — Reference scoring guide for field assessors. Each element shows example threshold values for scores 1–5. Click any element to expand its scoring table. Hover over any underlined abbreviation for a quick definition, or use the Units Reference panel on the right.