Data Set

Data Set section used by Workbench Access

Dataset: 

Study number: 

375

Data set ID: 

210375001

Date range: 

1982-07-30 to 1986-09-24

Original investigator: 

Marsha Conley

Data contact: 

Abstract: 

Data set includes bi-weekly records of number of termites observed within and beneath each of 4 rolls of toilet paper placed at each of 91 stations on treatment and control transects. Observations of presence of termite activity at each roll (paper eaten, cartons constructed) are also included.

Data set includes bi-weekly records of number of termites observed within and beneath each of 4 rolls of toilet paper placed at each of 91 stations on treatment and control transects. Observations of presence of termite activity at each roll (paper eaten, cartons constructed) are also included.

Data download: 

Description: 

Data file information for the following Jornada data set: Transect Termites

LTER Core Area(s): 

Dataset: 

Study number: 

12

Data set ID: 

210012001

Date range: 

1982-04-30 to 2018-01-30

Original investigator: 

Peter Wierenga

Data contact: 

Abstract: 

Soil water content measurements in the form of raw count readings are made at 5 depths at each of 89 (2" O.D. diameter) aluminum access tubes on the Control transect and at every 5th station on the nitrogen fertilized Treatment transect using a neutron probe (Campbell Model 503DR Hydroprobe). Access tubes are installed such that there are 6 inches of tube aboveground.

Stations are 30 meters apart. Measurements are taken at 30cm, 60cm, 90cm, 110cm, and 130cm. Neutron probe readings taken in 6 lysimeters along transects are also included. 5 standard readings are taken at beginning and end of each transect, and after every 20 stations. Measurements taken at 2 week intervals from April 1982 to 1987, monthly since.

Data download: 

Description: 

CSV data file for Jornada dataset: Transect Soil Water Content Raw Count Data

CSV data file for Jornada dataset: Transect Soil Water Content Raw Count Data

LTER Core Area(s): 

Dataset: 

Study number: 

12

Data set ID: 

210012002

Date range: 

1982-04-30 to 2015-12-04

Original investigator: 

Peter Wierenga

Data contact: 

Abstract: 

Soil water content measurements (cm3 H2O / cm3 soil) at 5 depths at each of 89 (2" O.D. diameter) aluminum access tubes on the Control transect and at every 5th station on the nitrogen fertilized Treatment transect using a neutron probe (Campbell Model 503DR Hydroprobe). Access tubes are installed such that there are 6 inches of tube aboveground. Stations are 30 meters apart.

Measurements are taken at 30cm, 60cm, 90cm, 110cm, and 130cm. Neutron probe readings taken in 6 lysimeters along transects are also included. 5 standard readings are taken at beginning and end of each transect, and after every 20 stations. Measurements taken at 2 week intervals from April 1982 to 1987, monthly since.

Data download: 

Description: 

Data file information for the following Jornada data set: Transect Soil Water Content

LTER Core Area(s): 

Dataset: 

Data set ID: 

210400001

Date range: 

1985-01-27 to 1985-02-02

Original investigator: 

Peter Wierenga

Data contact: 

Abstract: 

Levels of basic cations (Ca, Mg, Na, K) extractable in 1N ammonium acetate (NH4Ac) from soils collected at stations C01 through C90 along the LTER-I Control transect.

Levels of basic cations (Ca, Mg, Na, K) extractable in 1N ammonium acetate (NH4Ac) from soils collected at stations C01 through C90 along the LTER-I Control transect.

Data download: 

Description: 

Data file information for the following Jornada data set: Transect Soil Cations

LTER Core Area(s): 

Dataset: 

Study number: 

400

Data set ID: 

210400002

Date range: 

1985-01-29 to 1986-01-29

Original investigator: 

Peter Wierenga

Data contact: 

Abstract: 

PO4-P levels in CaCl2 and NaHCO3 extracts of soils collected at each station along transect. Moisture content of soil samples is also included. No soil samples were collected along the fertilized (treated transect) in January 1985; January 1986 data contains both fertilized (treated) and control transect samples.

PO4-P levels in CaCl2 and NaHCO3 extracts of soils collected at each station along transect. Moisture content of soil samples is also included. No soil samples were collected along the fertilized (treated transect) in January 1985; January 1986 data contains both fertilized (treated) and control transect samples.

Data download: 

Description: 

Data file information for the following Jornada data set: Transect Soil Phosphate

LTER Core Area(s): 

Dataset: 

Study number: 

400

Data set ID: 

210400003

Date range: 

1982-03-20 to 1984-06-20

Original investigator: 

Peter Wierenga

Data contact: 

Abstract: 

Variation in the soil from place to place is a fact of nature and is substantial. It is a major source of uncertainty in soil survey and causes many of the difficulties of applying mathematics to the study of soil. Soil variability within small areas can be studied by using a straight line (transect) laid over a tract of known distance and can be sampled and observed equidistantly.

Line transects give an indication of both the local and the general variation. The technique, however, may depend strongly on direction of the transect. Soil along the LTER I Control transect was sampled at 30 meter intervals from station C01 through C89. Soil characteristics were measured at 4 depths (30, 60, 90, and 120 cm) for the percent composition of clay, silt, sand, very coarse sand, coarse sand, medium sand, fine sand, very fine sand, calcium carbonate, organic carbon and coarse fragments greater than 2mm.

Data download: 

Description: 

Data file information for the following Jornada data set: Transect Particle Size Analysis

LTER Core Area(s): 

Dataset: 

Study number: 

400

Data set ID: 

210400004

Date range: 

1985-01-31 to 1986-01-22

Original investigator: 

Peter Wierenga

Data contact: 

Abstract: 

Total nitrogen in soil was determined on control and treatment (fertilized) transects by Kjeldahl digestion.

Total nitrogen in soil was determined on control and treatment (fertilized) transects by Kjeldahl digestion.

Data download: 

Description: 

Data file information for the following Jornada data set: Transect Total Nitrogen in Soil

LTER Core Area(s): 

Dataset: 

Study number: 

399

Data set ID: 

210399001

Date range: 

1983-08-29 to 1986-07-23

Original investigator: 

Fred Fisher

Data contact: 

Abstract: 

NO3 + NO2-N and NH4-N levels of soil samples collected at each station along transect. Moisture content of soil samples is also included.

NO3 + NO2-N and NH4-N levels of soil samples collected at each station along transect. Moisture content of soil samples is also included.

Data download: 

Description: 

Data file information for the following Jornada data set: Transect Soil Nitrogen

LTER Core Area(s): 

Dataset: 

Study number: 

387

Data set ID: 

210387003

Date range: 

1986-11-08 to 1990-04-06

Original investigator: 

H T Mun

Data contact: 

Abstract: 

*We designed a study to examine the long-term spatial and temporal patterns of mass loss, changes in nitrogen content and chemical composition during decomposition of roots in a desert watershed.

Because nitrogen availability has been hypothesized to affect decomposition rates of buried litter in deserts, we studied decomposition of roots along a transect on a desert watershed that had been fertilized with ammonium nitrate and compared these results with the decomposition of roots along a transect that had not been fertilized.

Data download: 

Description: 

Data file information for the following Jornada data set: Root Weight

LTER Core Area(s): 

Dataset: 

Study number: 

387

Data set ID: 

210387002

Date range: 

1986-11-08 to 1990-04-06

Original investigator: 

H T Mun

Data contact: 

Abstract: 

*We designed a study to examine the long-term spatial and temporal patterns of mass loss, changes in nitrogen content and chemical composition during decomposition of roots in a desert watershed.

Because nitrogen availability has been hypothesized to affect decomposition rates of buried litter in deserts, we studied decomposition of roots along a transect on a desert watershed that had been fertilized with ammonium nitrate and compared these results with the decomposition of roots along a transect that had not been fertilized.

Data download: 

Description: 

Data file information for the following Jornada data set: Root Chemistry Raw Data

LTER Core Area(s): 

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