Long-term Archive of the DUCK94 Nearshore Field Experiment Data

1999 ◽  
Author(s):  
William Birkemeier ◽  
Kent Hathaway ◽  
Ravi Sinha ◽  
Kossi Edoh ◽  
Awatif Amin ◽  
...  
Keyword(s):  
Field Experiment ◽  
Experiment Data

“Maybe It’s More Natural for Them to Have Been Out of Work for a Little While”

2020 ◽  
pp. 103-112
Author(s):  
David S. Pedulla
Keyword(s):  
Field Experiment ◽  
Racial Discrimination ◽  
Statistical Test ◽  
Job Applicants ◽  
Compelling Evidence ◽  
Negative Effects ◽  
Experiment Data ◽  
Negative Effect

This chapter turns to how the consequences of long-term unemployment vary with the race of the applicant. It presents results from field-experiment data to indicate that while certain groups of workers are severely penalized for a year of unemployment, others are not. This chapter probes those differences and develops an understanding of how and why race and experiences of unemployment interact in the ways that they do. It also examines whether the effects of unemployment differed in a statistically significantly way for white and black applicants. The results from this statistical test provide compelling evidence that this is indeed the case. While racial discrimination is strong and persistent, and long-term unemployment has negative effects for white job applicants, there is little additional negative effect of unemployment for black applicants.

Long-Term Archive of the DUCK94 Nearshore Field Experiment Data

2000 ◽  
Author(s):  
William Birkemeier ◽  
Kent Hathaway ◽  
Ravi Sinha ◽  
Kossi Edoh ◽  
Awatif Amin ◽  
...  
Keyword(s):  
Field Experiment ◽  
Experiment Data

Long-term Archive of the DUCK94 Nearshore Field Experiment Data

2001 ◽  
Author(s):  
William Birkemeier ◽  
Kent Hathaway ◽  
Ravi Sinha
Keyword(s):  
Field Experiment ◽  
Experiment Data

Biomass production of weeds on the winter wheat stubble in long-term fertilization field experiment

2005 ◽  
Vol 33 (1) ◽  
pp. 251-254 ◽  
Author(s):  
Éva Lehoczky ◽  
András Kismányoky ◽  
Tamás Kismányoky
Keyword(s):  
Winter Wheat ◽  
Field Experiment ◽  
Biomass Production ◽  
Wheat Stubble

scholarly journals Inhibition or Facilitation? Contrasted Inter-Specific Interactions in Sphagnum under Laboratory and Field Conditions

Plants ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1554
Author(s):  
Chao Liu ◽  
Zhao-Jun Bu ◽  
Azim Mallik ◽  
Yong-Da Chen ◽  
Xue-Feng Hu ◽  
...  
Keyword(s):  
Field Experiment ◽  
Species Interactions ◽  
Laboratory Experiments ◽  
Resource Competition ◽  
Specific Interactions ◽  
Interaction Type ◽  
Negative Effects ◽  
Experiment Data ◽  
The Stability ◽  
Positive Effect

In a natural environment, plants usually interact with their neighbors predominantly through resource competition, allelopathy, and facilitation. The occurrence of the positive effect of allelopathy between peat mosses (Sphagnum L.) is rare, but it has been observed in a field experiment. It is unclear whether the stability of the water table level in peat induces positive vs. negative effects of allelopathy and how that is related to phenolic allelochemical production in Sphagnum. Based on field experiment data, we established a laboratory experiment with three neighborhood treatments to measure inter-specific interactions between Sphagnum angustifolium (Russ.) C. Jens and Sphagnum magellanicum Brid. We found that the two species were strongly suppressed by the allelopathic effects of each other. S. magellanicum allelopathically facilitated S. angustifolium in the field but inhibited it in the laboratory, and relative allelopathy intensity appeared to be positively related to the content of released phenolics. We conclude that the interaction type and intensity between plants are dependent on environmental conditions. The concentration of phenolics alone may not explain the type and relative intensity of allelopathy. Carefully designed combined field and laboratory experiments are necessary to reveal the mechanism of species interactions in natural communities.

Comparison of the results of 85Kr transport modeling with the ACURATE field experiment data

2017 ◽  
Vol 42 (3) ◽  
pp. 168-180 ◽  
Author(s):  
K. G. Rubinshtein ◽  
A. N. Safronov ◽  
D. A. Pripachkin ◽  
R. Yu. Ignatov ◽  
S. V. Emelina ◽  
...  
Keyword(s):  
Field Experiment ◽  
Transport Modeling ◽  
Experiment Data ◽  
Comparison Of The Results

Exploring the Vis-NIR wavelength importance in SOC models under field and lab conditions in a long-term field experiment

2021 ◽  
Author(s):  
Javier Reyes ◽  
Mareike Ließ
Keyword(s):  
Field Experiment ◽  
Spectral Response ◽  
Nir Spectroscopy ◽  
Partial Least Square ◽  
Least Square ◽  
Field Conditions ◽  
Partial Least Square Regression ◽  
Preprocessing Technique ◽  
Term Field

<p>Soil organic carbon (SOC) is of particular interest in the study of agricultural systems as an indicator of soil quality and soil fertility. In the use of Vis-NIR spectroscopy for SOC detection, the interpretation of the spectral response with regards to the importance of individual wavelengths is challenging due to the soil’s composition of multiple organic and minerals compounds. Under field conditions, additional aspects affect the spectral data compared to lab conditions. This study compared the spectral wavelength importance in partial least square regression (PLSR) models for SOC between field and lab conditions. Surface soil samples were obtained from a long-term field experiment (LTE) with high SOC variability located in the state of Saxony-Anhalt, Germany. Data sets of Vis-NIR spectra were acquired in the lab and field using two spectrometers, respectively. Four different preprocessing methods were applied before building the models. Wavelength importance was observed using variable importance in projection. Differences in wavelength importance were observed depending on the measurement device, measurement condition, and preprocessing technique, although pattern matches were identifiable, especially in the NIR range. It is these pattern matches that aid model interpretation to effectively determine SOC under field conditions.</p>

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