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Transect Soil Mineralization Potential (Initial) in a Grazing Exclosure on the Jornada Basin LTER, 1989

General Information
Data Package:
Local Identifier:knb-lter-jrn.210015003.55
Title:Transect Soil Mineralization Potential (Initial) in a Grazing Exclosure on the Jornada Basin LTER, 1989
Alternate Identifier:DOI PLACE HOLDER
Abstract:

In the spring of 1982, as part of the establishment of the Jornada Long-Term Ecological Research site in southern New Mexico, a 135 ha portion of a 1500 ha, internally drained, watershed was exclosed from grazing by domestic livestock. Prior to exclosure the watershed, as well as the rest of the Jornada basin, had been moderately to heavily grazed for the past 100 years. Concurrent with grazing, the vegetation had undergone a dramatic change from desert grassland, with an almost continuous cover of C4 perennial grasses, to isolated patches of the original grassland in a mosaic with desert shrub dominated plant communities (Buffington and Herbel, 1965). Three parallel transects (2.7 km in length) run from the middle of the College Playa up into the foot of Mt. Summerford. The Control transect is to the west, the Treatment transect on the east side of the Control transect, and the Alternate Control to the east of the Treatment transect. Each transect is 30 meters wide with a 45 meter buffer zone between each transect. The Treatment transect was treated annually until 1987 with NHNO3 in a concentration equal to 10g N/m2.Soil mineralization was examined on the control and fertilized treatment transects in association with the vegetation biomass study. In 1989, soil properties were measured. This Dataset contains soil moisture correction factor, sample weight, total inorganic nitrogen (NO3+NO2-N), and nitrogen in ammonium (NH4-N) for Week 0 of nitrogen mineralization potentials. This study is complete.

Short Name:JornadaStudy_015_transect_biomass_soil_mineralization_potential_initial_data
Publication Date:2019-07-18
Language:English

Time Period
Date:
1989-11-27

People and Organizations
Contact:Manager, Data (datamanager.jrn.lter@gmail.com) 
Creator:Whitford, Walter 

Data Entities
Data Table Name:
data_JornadaStudy_015_transect_biomass_soil_mineralization_potential_initial_data
Description:
Data file information for the following Jornada data set: Transect Soil Mineralization Potential (Initial)
Detailed Metadata

Data Entities

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-jrn/210015003/55/b108ce8cbab12e3c9926f36dfa15ec52
Name:data_JornadaStudy_015_transect_biomass_soil_mineralization_potential_initial_data
Description:Data file information for the following Jornada data set: Transect Soil Mineralization Potential (Initial)
Number of Columns:13

Time Period
Date:
1989-11-27

Table Structure
Object Name:JornadaStudy_015_soil_mineralization_potential_initial_data.csv
Size:4336
Text Format:
Number of Header Lines:28
Number of Foot Lines:0
Record Delimiter:\r\n
Orientation:column
Simple Delimited:
Field Delimiter:,
Quote Character:"

Table Column Descriptions
 Observation Numbersample IDcan numbersoil can weightWet weightDry weightWater Percentcorrection factorweight of sampleNO3/NO2-N concentrationNH4-N concentrationNO3+NO2-N-dryNH4-N-dry
Column Name:obs  
samp  
can_num  
weight_can  
weight_wet  
weight_dry  
h2o_percent  
cor_fac  
weight_sample  
no3_no2_n_solution  
nh4_n_solution  
no3_no2_n_dry  
nh4_n_dry  
Definition:Observation NumberSample ID [UG = Upper Grassland, W = west side of transect midline,CB = Creosotebush, E = east side of transect midline, MB = Mixed Basin, C## = control transect station #,T## = treatment transect, station #]soil can numbercan weightwet weight (soil + can)dry weight (soil + can)moisture contentCorrection Factorsample weightNO3+NO2-N (nitrogen in nitrate and nitrite per liter of extract solution)NH4-N (nitrogen in ammonium per liter of extract solution)NO3+NO2-N (nitrogen in nitrate and nitrite per kg oven dry soil)NH4-N (nitrogen in ammonium per kg oven dry soil)
Storage Type:   string  
                      
Measurement Type:rationominalratioratioratioratioratioratioratioratioratioratioratio
Measurement Values Domain:
UnitN/A
Precision1
Typereal
Min1 
Max60 
DefinitionSample ID [UG = Upper Grassland, W = west side of transect midline,CB = Creosotebush, E = east side of transect midline, MB = Mixed Basin, C## = control transect station #,T## = treatment transect, station #]
UnitN/A
Precision1
Typereal
Min3 
Max141 
Unitg
Precision0.01
Typereal
Unitg
Precision0.01
Typereal
Unitg
Precision0.01
Typereal
Unit%
Precision0.01
Typereal
UnitN/A
Precision0.001
Typereal
Unitg
Precision0.01
Typereal
Unitmg/l
Precision0.001
Typereal
Unitmg/l
Precision0.001
Typereal
Unitmg/kg
Precision0.01
Typereal
Unitmg/kg
Precision0.01
Typereal
Missing Value Code:      
Code#N/A
ExplMissing/questionable value
Code#N/A
ExplMissing/questionable value
Code#N/A
ExplMissing/questionable value
Code#N/A
ExplMissing/questionable value
Code#N/A
ExplMissing/questionable value
Code#N/A
ExplMissing/questionable value
Code#N/A
ExplMissing/questionable value
Code#N/A
ExplMissing/questionable value
Code#N/A
ExplMissing/questionable value
Code#N/A
ExplMissing/questionable value
Accuracy Report:                          
Accuracy Assessment:                          
Coverage:                          
Methods:                          

Data Package Usage Rights

Data Policies

This data package is released to the “public domain” under Creative Commons CC0 1.0 “No Rights Reserved” (see: https://creativecommons.org/publicdomain/zero/1.0/). It is considered professional etiquette to provide attribution of the original work if this data package is shared in whole or by individual components. A generic citation is provided for this data package on the website https://portal.edirepository.org (herein “website”) in the summary metadata page. Communication (and collaboration) with the creators of this data package is recommended to prevent duplicate research or publication. This data package (and its components) is made available “as is” and with no warranty of accuracy or fitness for use. The creators of this data package and the website shall not be liable for any damages resulting from misinterpretation or misuse of the data package or its components. Periodic updates of this data package may be available from the website. Thank you.

Keywords

By Thesaurus:
LTER Core AreaInorganic Nutrients
Jornada Dataset KeywordsManagement Practices, Plant, Nitrogen, and Micronutrients, Climate, Soils and Atmosphere, non-core
LTER Controlled Vocabularygrazing, mineralizationn, soil, nitrogen, ammonium, nitrate, biomass, transects

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package
Description:

Field and electronic data sheets.

Description:

This is the detailed procedure used: A total of 60 samples will be collected from 30 stations. 1 composite sample will be taken on each side of the transect midline, and will consist of 4 1" soil cores taken approximately 2m down from the plant line intercept line and spaced over 15m perpendicular to the transect. This is a total of 30 soil samples at 15 stations on each of the control and treatment transects. Monday, November 27 1. 60 samples are collected on Monday morning and must be processed that afternoon. 2. Mix samples thoroughly by shaking the bag after untying it. 3 Add approximately 10 g to 48 KCl bottles containing 100 ml 2N KCl and labeled with a 5 character code such as C60E. (Week 0.) We will reuse these bottles several more times. 4. Shake each bottle vigorously 30 times and leave on table. 5. Sieve each sample through a 2-mm sieve and then put about 20 g in soil moisture cans for moisture content. RETIE BAGS AND REFRIGERATE UNUSED SOILS. Tuesday, November 28 1 Filter 60 KCl extracts into 60ml bottles labeled C12W-F to T90E-F. Use Whatman #42 filter paper that has been pre- washed with KCl. (F means "Field.") Thursday, November 30 1 Label a total of 180 vials as follows: 60 vials as C12W-2 through T90E-2. (week 2) 60 vials as C12W-4 through T90E-4. (week 4) 60 vials as C12W-8 through T90E-8. (week 8) 2. Remove soil moisture cans from oven, weight and calculate moisture content. 3. Calculate moisture to add to bring moisture content to 8%. ml's = (8 - MC)/4 where MC is moisture content of field soil. 4. Put 25.0 g of soil from each sample into each of 3 vials labeled with the same sample number. For example, weigh soil from sample C12W into vials labeled C12W-2, C12W-4, and C12W-8. 5. Cover vials with 3 layers of Glad Wrap secured with rubber bands. 6. From each sample put approximately 10 g into 100 ml 2N KCl and shake vigorously 30 times. Leave out on table. (Use bottles previously labeled.) 7. Add appropriate amount of water to the vials through the Glad Wrap using a 2.5-ml syringe. Do not shake the vials. Puncture the Glad Wrap with the syringe even if it is not necessary to add water. 8. Weigh vial+sample+Glad Wrap+rubber band and record weight. 9. Incubate the vials at 35oC. AIR DRY THE REMAINING SOIL for 10 days and then store. Friday, December 1 1. Filter KCl extracts using prewashed Whatman #42 filter paper into 60-ml bottles labeled C12W-0 through T90E-0. (Time zero.) Monday, December 4 1. Weigh soil moisture cans and calculate soil moisture content. Thursday, December 7, 14, 21, 28, January 4, 11, 18 1. Weeks 2 and 4 (December 14 and 28): Remove the appropriate vials for extraction first (see below). 2. Weigh each vial and add enough water from a 2.5-ml syringe through the existing hole in the Glad Wrap to return the weight to the original value. Thursday, December 14 1. Remove the week 2 vials (labeled with "-2"). 2. Dump vial on freezer paper and split vertically with scoop. 3. Put about 1/2 (about 10 g) in 125-ml bottles with 2N KCl and shake vigorously 30 times. Use 125-ml bottles already labeled. 4. Put remaining soil in soil moisture can, record weight, and oven dry for 72 hours. 5. Adjust moisture content in remaining vials (see above). Friday, December 15 1. Filter 60 KCl extracts using prewashed Whatman #42 filter papers into 60-ml bottles labeled C12W-2 through T90E-2. Monday, December 18 1. Weigh soil moisture cans and calculate soil moisture content. Thursday, December 28 1. Remove the week 4 vials (labeled with "-4"). 2. Dump vial on freezer paper and split vertically with scoop. 3. Put about 1/2 (about 10 g) in 125-ml bottles with 2N KCl and shake vigorously 30 times. Use 125-ml bottles already labeled. 4. Put remaining soil in soil moisture can, record weight, and oven dry for 72 hours. 5. Adjust moisture content in remaining vials (see above). Friday, December 29 1. Filter 60 KCl extracts using prewashed Whatman #42 filter papers into 60-ml bottles labeled C12W-4 through T90E-4. Tuesday, January 2 1. Weigh soil moisture cans and calculate soil moisture content. Thursday, January 25 1. Remove the remaining vials. 2. Dump vial on freezer paper and split vertically with scoop. 3. Put about 1/2 (about 10 g) in 125-ml bottles with 2N KCl and shake vigorously 30 times. Use 125-ml bottles already labeled. 4. Put remaining soil in soil moisture can, record weight, and oven dry for 72 hours. Friday, January 26 1. Filter 60 KCl extracts using prewashed Whatman #42 filter papers into 60-ml bottles labeled C12W-8 through T90E-8. Monday, January 29 1. Weigh soil moisture cans and calculate soil moisture content.

People and Organizations

Publishers:
Organization:Jornada Basin LTER
Web Address:
http://jornada.nmsu.edu/lter
Creators:
Individual: Walter Whitford
Contacts:
Individual: Data Manager
Organization:datamanager.jrn.lter@gmail.com

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Time Period
Date:
1989-11-27
Geographic Region:
Description:Our study site is located in the northern Chihuahuan Desert, approximately 25 km northeast of Las Cruces, New Mexico, USA (+32.6 N, -106.7 W, elevation 1315 m). Annual precipitation is 24 cm and maximum temperatures average 13 C in January and 36 C in June. Our study site includes the 78,000 ha Jornada Experimental Range operated by the USDA Agricultural Research Service (http://jornada.nmsu.edu/), and the 22,000 ha Chihuahuan Desert Rangeland Research Center (CDRRC, http://chihuahuansc.nmsu.edu/) operated by New Mexico State University (http://www.nmsu.edu/).
Bounding Coordinates:
Northern:  32.7494871013Southern:  32.4731725883
Western:  -106.87288312Eastern:  -106.692716261
Altitude (meter):1315

Temporal, Geographic and/or Taxonomic information that applies to Data Table: data_JornadaStudy_015_transect_biomass_soil_mineralization_potential_initial_data


Time Period
Date:
1989-11-27

Project

Maintenance

Maintenance:
Description:

Sampling occured once in 1989. This study is complete.

Frequency:

Additional Info

Additional Information:
 

The exclosure lies along a northeast facing piedmont slope at the base of a steep isolated mountain peak, and covers a variety of component landforms from the foot of the mountain to the basin floor. The northeast side of the exclosure is immediately upslope of the College Playa located near the NMSU College Ranch. Three parallel transects (2.7 km in length) run from the middle of the College Playa up into the foot of Mt. Summerford. The Control transect is to the west, the Treatment transect on the east side of the Control transect, and the Alternate Control to the east of the Treatment transect. Each transect is 30 meters wide with a 45 meter buffer zone between each transect. The Treatment transect was treated annually until 1987 with NHNO3 in a concentration equal to 10g N/m2. The station markers at 30 meter intervals along each transect. Perpendicular to each transect and crossing at each station marker is the 30 meter plant line intercept transect. This extends 15 meters on either side of the station marker. The ends of the plant line intercept transect are marker by short rebar sticking up about 6 inches aboveground. The plant line intercept transects are thus perpendicular to the direction of major drainage flow. There are 91 stations on each of the 3 2.7 km transects.

Other Metadata

Additional Metadata

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