Herbicide applied to Replicate 1

This table lists the herbicide applications for Replicate 1 on the LTER Main site. Herbicide application on the other replicates might differ in timing or amounts. Application rates are generally in amount of commercial solution of herbicide per hectare

This datatable is part of the Main Cropping System Experiment dataset. This dataset includes information about the LTER main site treatments, agronomic practices carried out on the treatments and approved site use requests.

Most long-term hypotheses associated with the KBS LTER site are being tested within the context of the main cropping systems study. This study was established on a 48 ha area on which a series of 7 different cropping systems were established in spring 1988, each replicated in one of 6 ha blocks. An eighth never-tilled successional treatment, is located 200 m off-site, replicated as four 0.06 ha plots.

Cropping systems include the following treatments:

  1. standard chemical input corn/soybean/wheat rotation conventionally tilled (corn/soybean prior to 1992)
  2. standard chemical input corn/soybean/wheat rotation no-tilled (corn/soybean prior to 1992)
  3. low chemical input corn/soybean/wheat rotation conventionally tilled (ridge till prior to 1994)
  4. zero chemical input corn/soybean wheat rotation conventionally tilled (ridge till prior to 1994)
  5. Populus clones on short-rotation (6-7 year) harvest cycle
  6. continuous alfalfa, replanted every 6-7 years
  7. early successional community on historically tilled soil
  8. successional community on never-tilled soil.

For specific crops in a given year see the Annual Crops Summary Table.

In 1993 a series of forest sites were added to the main cropping system study to provide long-term reference points and to allow hypotheses related to substrate diversity to be tested. These include:

  • DF – three deciduous forest stands, two old-growth and one 40-60 years post-cutting
  • CF – three conifer plantations, 40-60 years old
  • SF – three old-field (mid-successional) sites 40+ years post-abandonment.

All share a soil series with the main cropping system treatments, and are within 5 km of all other sites.

For each system (and for a number of microplot treatments nested within the main treatment plots) the following baseline variates are being measured (described in greater detail in other data set descriptors):

  • plant characteristics, including species distributions and abundances, net aboveground productivity by functional group (crop vs. non dominant biomass, selected non dominant biomass), economic yields, tissue C and N contents, seed bank composition;
  • soil chemical and physical characteristics, including soil moisture, pH, inorganic N and P pools, total C, N, and P pools, bulk density;
  • soil biological characteristics, including microbial biomass C and N, N mineralization rates (buried bags), microbial populations, invertebrate populations; and
  • insect and pathogen dynamics, including distributions and abundances of major insect pests and predators and of Fusarium pathogens.

Note

Experiment: Main Cropping System Experiment (MCSE)
Data available from: April 1989 to July 2017
Dataset: KBS004
Datatable ID: KBS004-010.63
Related Tables:
Personnel:
Last Updated 2017-12-18
Variate Description Units
Obs Date observation date
Treatment treatment identifier
Plot research plot
Material material applied
Rate kg ha rate that the material is applied at kg/ha
comment aglog entry

Data Excerpt

obs_date treatment plot material rate_kg_ha comment
2017-07-06 T8 T8ntR1 Roundup Power Max (glyphosate 48.7%) 2.34 Sprayed the LTER CE Sutdy treatments C1, C2 and C3 and sprayed t8nt plots the north and south 8 feet headlands (due to corn was to tall to go into plot) with a post emerge application of Roundup PowerMax, and ammonium sulfate. Roundup Power Max (EPA Reg. No. 524-549) was applied at 1 qt/A and Ammonium Sulfate (sprayable, CAS #7783-20-2) was applied at 17 lbs/100 gallons of carrier. Weather conditions: At the start 9:18 a.m. sunny 70 degrees F, humidity was 79 % with 2-3 mph south east winds. End of application 2:34 p.m. sunny, 86 degrees F, humidity 48 %, with 3-6 mph south west winds.
2017-06-09 T1 T1R1 Lexar EZ 7.03 Sprayed LTER Main Site treatment T1 all replications (6, 3, 2, 5, 1, 4), and T2 all replications (6, 1, 4, 3, 2, 5) for post-emergence weed control where corn was planted. Sprayed with Roundup Powermax at a rate of 22 oz/A ( T1 rep 4 rate was increased to 32 oz/A due to the amount of grass in the plot), ammonium sulfate at 3.4 lbs/A and Lexar at 3 qts/A. Weather conditions at the start 9:00 a.m. were mostly sunny 62 degrees F, 74% humidity with 4-6 mph south west winds. Conditions at the end 3:30 p.m. were mostly sunny, 80 degrees F, 52% humidity, and 9.5-10 mph winds out of the south west.
2017-06-09 T1 T1R1 Roundup Power Max (glyphosate 48.7%) 1.61 Sprayed LTER Main Site treatment T1 all replications (6, 3, 2, 5, 1, 4), and T2 all replications (6, 1, 4, 3, 2, 5) for post-emergence weed control where corn was planted. Sprayed with Roundup Powermax at a rate of 22 oz/A ( T1 rep 4 rate was increased to 32 oz/A due to the amount of grass in the plot), ammonium sulfate at 3.4 lbs/A and Lexar at 3 qts/A. Weather conditions at the start 9:00 a.m. were mostly sunny 62 degrees F, 74% humidity with 4-6 mph south west winds. Conditions at the end 3:30 p.m. were mostly sunny, 80 degrees F, 52% humidity, and 9.5-10 mph winds out of the south west.
2017-06-09 T2 T2R1 Lexar EZ 7.03 Sprayed LTER Main Site treatment T1 all replications (6, 3, 2, 5, 1, 4), and T2 all replications (6, 1, 4, 3, 2, 5) for post-emergence weed control where corn was planted. Sprayed with Roundup Powermax at a rate of 22 oz/A ( T1 rep 4 rate was increased to 32 oz/A due to the amount of grass in the plot), ammonium sulfate at 3.4 lbs/A and Lexar at 3 qts/A. Weather conditions at the start 9:00 a.m. were mostly sunny 62 degrees F, 74% humidity with 4-6 mph south west winds. Conditions at the end 3:30 p.m. were mostly sunny, 80 degrees F, 52% humidity, and 9.5-10 mph winds out of the south west.
2017-06-09 T2 T2R1 Roundup Power Max (glyphosate 48.7%) 1.61 Sprayed LTER Main Site treatment T1 all replications (6, 3, 2, 5, 1, 4), and T2 all replications (6, 1, 4, 3, 2, 5) for post-emergence weed control where corn was planted. Sprayed with Roundup Powermax at a rate of 22 oz/A ( T1 rep 4 rate was increased to 32 oz/A due to the amount of grass in the plot), ammonium sulfate at 3.4 lbs/A and Lexar at 3 qts/A. Weather conditions at the start 9:00 a.m. were mostly sunny 62 degrees F, 74% humidity with 4-6 mph south west winds. Conditions at the end 3:30 p.m. were mostly sunny, 80 degrees F, 52% humidity, and 9.5-10 mph winds out of the south west.
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