Annual Crops Population Estimates

The number of crop plants are counted in a one square meter quadrant.

This datatable is part of the Annual Net Primary Production on the Main Cropping System Experiment dataset. Aboveground annual net primary production (ANPP) has been measured on the LTER main site since 1990 and on the successional and forested sites since 1993. ANPP is measured at peak biomass for a given treatment. In some systems with multiple harvests or complex communities that have peaks occurring at different times of the year, measurements are taken at multiple times per year. Additional ANPP measurements are made where appropriate using leaf litter traps, estimates of diameter from tree basal diameter and for the poplar treatment occasional destructive harvests. See the ANPP protocol for descriptions of the sampling and measurement methods for each of the treatments.

Note

Experiment: Main Cropping System Experiment (MCSE)
Data available from: October 2005 to July 2016
Dataset: KBS019
Datatable ID: KBS019-016.74
Core Areas Primary Production,Disturbance,Populations
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Last Updated 2017-12-20
Variate Description Units
date sample date
treatment treatment that the sample came from
replicate replicate plot the sample was taken from
station the station where the plants were collected
species crop species grown
plants per square meter number of plants per square meter quadrant number/metersquared

Data Excerpt

date treatment replicate station species plants_per_square_meter
2016-07-08 T6 R4 S2 TRIAE 488
2016-07-08 T6 R4 S3 TRIAE 543
2016-07-08 T6 R4 S4 TRIAE 506
2016-07-08 T6 R4 S5 TRIAE 582
2016-07-08 T6 R5 S1 TRIAE 592
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