Knowledge graph centered on Grid-based root presence-absence quantification from soil pit photographs (Plantae) with 70 nodes and 146 connections. Top connected: elevational gradients, Lupinus, woody stems, browse, carbon cycling.
Photographs of soil pit faces are overlaid with 1×1 cm grids to systematically score presence or absence of fine and coarse roots in each grid cell, providing depth-resolved estimates of root spatial distribution.
Synthesized from method descriptions across 4 papers using this protocol.
Steps below were extracted from the most recent peer-reviewed implementation of this protocol in the corpus — Depth of nutrient uptake by deep-rooted plants is regulated by water availability (2026), PNAS. Implementations in other papers (listed below) may differ.