jar method

Knowledge graph centered on jar method with 73 nodes and 149 connections. Top connected: Rocky Mountain Biological Laboratory, Gothic, Crested Butte, Engelmann Spruce, Boechera stricta.

Method synopsis

Standardized wet sieving method using Yoder device to determine soil aggregate size distributions. Measures water-stable aggregates across multiple size classes to assess soil structure.

Synthesized from method descriptions across 5 papers using this protocol.

Procedure from a recent peer-reviewed implementation

Steps below were extracted from the most recent peer-reviewed implementation of this protocol in the corpus — Soil signals of key mechanisms driving greater protection of organic carbon under aspen compared to spruce forests in a North American montane ecosystem (2025), Biogeosciences. Implementations in other papers (listed below) may differ.

1. Aggregate size distribution analysis
   Around 25 g of largest air-dried aggregates fully saturated with Dickson apparatus, placed on Yoder device with sieves (#4, 10, 17, 70), raised and lowered in water 2.8 cm per stroke at 36 strokes per minute for 10 min. Soil material remaining on each sieve dispersed with 200 mL of 2 g L⁻¹ HMP, mixed for 10 min, passed through sieve again, dried at 105°C for 12 h.
   Quantities: 25 g aggregate samples, 200 mL of 2 g L⁻¹ HMP solution, 4 sieve sizesDuration: 10 min agitation, 10 min mixing, 12 h drying at 105°CConditions: Laboratory conditions, 36 strokes per minute agitation, 105°C drying
   Equipment: Dickson apparatus, Yoder device, sieves (#4, 10, 17, 70), 2 g L⁻¹ HMP solution, drying oven

Typical Equipment

• Dickson apparatus
• Yoder device
• sieves (#4, 10, 17, 70)
• 2 g L⁻¹ HMP solution

Output Measurements

• aggregate size distribution
• geometric mean diameter
• fine aggregate fraction

Papers Using This Protocol (5)

Species Studied With This Protocol

Places Where Used