ANR Analytical Lab 

Sample Amount: Submit 300-500 g of dried and ground sample. Five (5) mL per element is required for samples submitted in extract form. N & C require one (1) gram of finely powdered soil (to pass through a 60 mesh sieve).

Soil Preparation: Air or oven-dry soil at 35-55°C (the Lab oven dries at 40°C). Grind to pass through a 2 mm sieve. Analysis for N, C, TKN and "total" metal analysis require grinding to pass through a 60 mesh screen.

Containers: Submit samples in pint-size plastic containers or in bags (plastic or paper).

Notes:

Sodium Adsorption Ratio and Exchangeable Sodium Percent are calculations derived from analysis of Ca, Mg and Na.

For N and C by combustion (Carlo-Erba), 1 gram of sample material needs to be finely ground to pass through a 60 mesh sieve.

To determine available N-P-K on California soils, we normally analyze for NO₃-N, Olsen-P and Exchangeable K.

Method Summaries

Soil Salinity
Soil Fertility
Physio-Chemical

Soil Salinity

Soil Fertility

Physio-Chemical