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Field and Lab Methods

Laboratory basics

Processing colorimetric data
Standard curve basics
Making molar solutions
Flushing LACHAT lines
Making sample labels
LACHAT reagent list

Field basics

Collecting soil porewater using lysimeters
Downloading water level data (HOBO)
Collecting soil for aggregate size class fractionation
Installing rhizon porewater samplers

Soil basics

Gravimetric soil moisture
Cation exchange capacity
Loss-on-ignition for soil organic matter
Aggregate size fractionation for soil carbon
Soil pH in water
Soil pH in calcium chloride
Soil electrical conductivity

Soil extractions

Sequential extraction for soil phosphorus
Bicarbonate extraction for inorganic soil phosphorus
Bicarbonate extraction for organic soil phosphorus
Mehlich-3 extraction for labile soil phosphorus
Potassium chloride extraction for inorganic soil nitrogen
Oxalate and total aluminum and iron extractions
Sequential iron extraction

Chemical analysis

Atomic absorption standard operating procedure
Atomic absorption auto sampler procedure
Atomic absorption - Iron (Fe) method
Atomic absorption - Aluminum (Al) method
Phenol-hypochlorite colorimetric method for ammonium
Molybdate blue colorimetric method for phosphate
Cadmium reduction colorimetric method for nitrate
LAQUA Meter for measuring nitrate in the field

Digestion protocols

Potassium persulfate digestion - water
Kjeldahl digestion - soils
Kjeldahl digestion - plant tissue
Persulfate recrystallization procedure
Making organic standards for digestion quality control

Learn more about…

RISING Coalition

SALT Extension Program

Agroecology Lab

Plant Science and Landscape Architecture

University of Maryland

2108 Plant Sciences Bldg
College Park, MD 20742

(301) 405-1469
kltully@umd.edu