Planting details in replicate 1

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: November 1988 to March 2016
Dataset: KBS004
Datatable ID: KBS004-013.63
Related Tables:
Personnel:
Last Updated 2017-10-24
Variate Description Units
obs date The observation date
Treatment experimental treatment
Material material used
Rate rate of application number
Unit units per acre
Comment aa note about the sample

Data Excerpt

obs_date treatment material rate unit comment
2017-11-08 T3 rye unknown No-till planted wheeler rye in the LTER Main Site Treatment T3, all replications (Reps 5, 4, 2, 3, 1, 6). Rye was planted with a target rate of 2.8 bu/A or 158lbs/A. Rye was actually seeded at 2.7 bu/A or 149 lbs/A. Planting depth was 1 to 1-1/2 inches deep and setting on drill was #39.
2017-11-01 T4 rye 158 pound No-till planted wheeler rye in the LTER Main Site Treatment T4, all replications (Reps 5, 4, 3, 2, 1, 6). Rye was planted with a target rate of 2.8 bu/A or 158lbs/A. Rye was actually seeded at 2.7 bu/A or 149 lbs/A. Planting depth was 1 to 1-1/2 inches deep and setting on drill was #39.
2017-06-03 T4 Viking Organic Seed Corn Variety O.88-91UP 32000 seeds Planted corn in the LTER Main Site T4 plots, all replications in the order of (5, 4, 3, 2, 1, and 6). Equipment Used: JD 7330 tractor and JD 1730 planter. Brand and Variety Planted: Viking O.88-91UP, from Albert Lea Seed, (Certified Organic variety). Relative maturity: O.99-91UP has a relative maturity of 91 days. Planting Population: 32,000 seeds/A. Planting Depth: 1.75-2 inches. Row Spacing: 30 inches.
2017-05-24 T3 Dekalb DKC52-84 RIB Corn Hybrid 32000 seeds Planted corn in the Main Site LTER T3 reps 1, 3, and 6. Because of wet soil conditions we could not plant reps 1, 3, and 6 on May 19-20, 2017 which is the dates reps 2, 4, and 5 were planted. Started to rain as I finished planting rep 6, it would have been to wet to start planting another replication on May 24, 2017 so glad that all the remaining reps were planted. Equipment used: Planted with JD 7330 tractor and JD 1730 planter. Planted Dekalb DKC52-84 RIB seed corn at 32,000 seeds/acre. Dekalb DKC52-84 RIB has a relative maturity of 102 days (2550 growing degree units to black layer). DKC52-84A RIB is Roundup Ready Genuity Smartstax RIB (refuge in a bag) corn blend. Planting depth: 1.5 inches. Tillage: Conventional. Fertilizer Applied: 19-17-0 liquid fertilizer at 14.0 gallons/acre. 14 gals/A of 19-17-0 supplies 29.22 lbs N/A and 26.14 lbs P205/A. Fertilizer placement: two inches to the side and two inches below the seed at planting.
2017-05-16 T1 Dekalb DKC52-84 RIB Corn Hybrid 32000 seeds Planted corn in the Main Site LTER T1 replications (5, 1, 4, 3, 2, and 6). Rep 5 was planted on May 15, 2017. Planted about 4-6 passed in T1R1 before a fertilizer tube was cut so we had to fix the fertilizer hose. Planted the remaining area in T1R1 on May 16, 2017. The remaining reps (4, 3, 2, and 6 were all planted on May 16, 2017. Equipment used: Planted with JD 7330 tractor and JD 1730 planter. Planted Dekalb DKC52-84 RIB seed corn at 32,000 seeds/acre. Planting depth: 1.5 inches. Dekalb DKC52-84 RIB has a relative maturity of 102 days (2550 growing degree units to black layer). DKC52-84A RIB is Roundup Ready Genuity Smartstax RIB (refuge in a bag) corn blend. Applied 19-17-0 liquid fertilizer at 14.0 gallons/acre. 14 gals/A of 19-17-0 supplies 29.22 lbs N/A and 26.14 lbs P205/A. The fertilizer was placed two inches to the side and two inches below the seed at planting.
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