GLBRC Sustainability Data Catalog

Nitrogen mineralization

During 2013, nitrogen mineralization and nitrification rates were measured at the GLBRC Intensive sites. Each main plot and microplot was measured 3 times (early growing season, mid-growing season, and post-harvest) using 28-day lab incubations at constant soil moisture and temperature. This table contains the change in soil nitrate (plus nitrite) and ammonium over the incubation period, which is used to calculate potential mineralization and nitrification rates.

This datatable is part of the GLBRC soil properties dataset. Soil measurements from GLBRC experiments.

Note

Experiment: GLBRC Biofuel Cropping System Experiment
Data available from: May 2013 to November 2013
Dataset: GLBRC088
Datatable ID: GLBRC088-019.64
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Last Updated 2017-01-26
Variate Description Units
sample collection date date the soil was collected from the field
initial incubation date first date of the incubation
final incubation date last day of the incubation
site site location
treatment experimental treatment
replicate replicate nested within treatment
main or microplot sample was collected from the main section of field or section of field where micro plot activity occurs
depth the depth to which the soil was sampled centimeter
soil moisture percent gravimetric moisture on a dry weight basis grams/gram
adjusted soil moisture the moisture at which the assay was run. grams/gram
no3 initial the NO3-N amount at the beginning of the incubation μg/g
nh4 initial the NH4-N amount at the beginning of the incubation μg/g
no3 final the NO3-N amount at the end of the incubation. μg/g
nh4 final the NH4-N amount at the end of the incubation μg/g
days the number of days of the incubation number
net nitrification net nitrification per day micrograms/gram/day
net mineralization net mineralization (final n - initial n)/days micrograms/gram/day

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Data Excerpt

sample_collection_date initial_incubation_date final_incubation_date site treatment replicate main_or_microplot depth soil_moisture adjusted_soil_moisture no3_initial nh4_initial no3_final nh4_final days net_nitrification net_mineralization
2013-04-29 2013-05-02 2013-05-30 KBS GLBRC Intensive Site G1 R1 main 25 14.70 18.75 2.078 1.401 9.318 0.716 28 0.259 0.234
2013-04-29 2013-05-02 2013-05-30 KBS GLBRC Intensive Site G1 R1 mp 25 15.47 18.75 1.904 1.663 6.476 0.895 28 0.163 0.136
2013-04-29 2013-05-02 2013-05-30 KBS GLBRC Intensive Site G1 R2 main 25 15.62 18.75 2.569 2.636 7.604 0.412 28 0.180 0.100
2013-04-29 2013-05-02 2013-05-30 KBS GLBRC Intensive Site G1 R2 mp 25 14.97 18.75 1.686 0.851 4.382 0.665 28 0.096 0.090
2013-04-29 2013-05-02 2013-05-30 KBS GLBRC Intensive Site G1 R3 main 25 15.99 18.75 1.892 1.314 6.163 0.629 28 0.153 0.128
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