Corn yield response to sub-surface banded starter fertilizer in the U.S.: A meta-analysis

2020 ◽  
Vol 254 ◽  
pp. 107834 ◽  
Author(s):  
Daniel J. Quinn ◽  
Chad D. Lee ◽  
Hanna J. Poffenbarger
Keyword(s):  
Meta Analysis ◽  
Yield Response ◽  
Corn Yield ◽  
Starter Fertilizer ◽  
The U.S

scholarly journals Weather effects on corn response to in-season nitrogen rates

2013 ◽  
Vol 93 (3) ◽  
pp. 407-417 ◽  
Author(s):  
M. Xie ◽  
N. Tremblay ◽  
G. Tremblay ◽  
G. Bourgeois ◽  
M. Y. Bouroubi ◽  
...  
Keyword(s):  
Meta Analysis ◽  
Yield Response ◽  
Corn Yield ◽  
Humid Climate ◽  
Nitrogen Rate ◽  
Nitrogen Response ◽  
Weather Effects ◽  
Nitrogen Rates ◽  
The Impact ◽  
Low Precipitation

Xie, M., Tremblay, N., Tremblay, G., Bourgeois, G., Bouroubi, M. Y. and Wei, Z. 2013. Weather effects on corn response to in-season nitrogen rates. Can. J. Plant Sci. 93: 407–417. The response of corn yield to in-season nitrogen rate (ISNR) fertilizer applications in a temperate humid climate is conditioned to a great extent by prevailing weather conditions, which affect nitrogen use efficiency and raise the level of uncertainty for making management decisions. A better understanding of the effects of temperature, expressed as accumulated corn heat units (CHU), and precipitation would help to ensure that a “closer-to-optimal” nitrogen rate is supplied at side-dressing. A meta-analysis was performed using a database of nitrogen response trials conducted from 1997 to 2008 in 60 locations in the corn grain production area of Québec, in conjunction with a weather database. Meta-analysis is a statistical procedure for combining results from a series of studies that is used in many fields of research. It is used to assess treatment effect (also called effect size) in a group of studies or experiments. Corn yield response to ISNR was negatively correlated with overall CHU accumulation, but positively correlated with CHU accumulation before side-dressing. Responses also showed a stronger relationship with cumulative precipitation (PPT) before side-dressing than after side-dressing. High and evenly distributed precipitation before side-dressing tended to increase responses to ISNR. It can be concluded that low CHU, low precipitation and low precipitation evenness before side-dressing reduce the impact of ISNR on corn yield.

A dynamic model of corn yield response to water

1980 ◽  
Vol 16 (1) ◽  
pp. 59-64 ◽  
Author(s):  
Thomas H. Morgan ◽  
Arlo W. Biere ◽  
Edward T. Kanemasu
Keyword(s):  
Dynamic Model ◽  
Yield Response ◽  
Corn Yield ◽  
Response To Water

scholarly journals Examining the Association and Directionality between Mental Health Disorders and Substance Use among Adolescents and Young Adults in the U.S. and Canada—A Systematic Review and Meta-Analysis

2018 ◽  
Vol 7 (12) ◽  
pp. 543 ◽  
Author(s):  
Sarvenaz Esmaeelzadeh ◽  
John Moraros ◽  
Lilian Thorpe ◽  
Yelena Bird
Keyword(s):  
Mental Health ◽  
Systematic Review ◽  
Substance Use ◽  
Young Adults ◽  
Meta Analysis ◽  
Mental Health Disorders ◽  
Adolescents And Young Adults ◽  
Health Disorders ◽  
The U.S

Background: The purpose of this systematic review was to examine the association and directionality between mental health disorders and substance use among adolescents and young adults in the U.S. and Canada. Methods: The following databases were used: Medline, PubMed, Embase, PsycINFO, and Cochrane Library. Meta-analysis used odds ratios as the pooled measure of effect. Results: A total of 3656 studies were screened and 36 were selected. Pooled results showed a positive association between depression and use of alcohol (odds ratio (OR) = 1.50, 95% confidence interval (CI): 1.24–1.83), cannabis (OR = 1.29, 95% CI: 1.10–1.51), and tobacco (OR = 1.65, 95% CI: 1.43–1.92). Significant associations were also found between anxiety and use of alcohol (OR = 1.54, 95% CI: 1.19–2.00), cannabis (OR = 1.36, 95% CI: 1.02–1.81), and tobacco (OR = 2.21, 95% CI: 1.54–3.17). A bidirectional relationship was observed with tobacco use at baseline leading to depression at follow-up (OR = 1.87, CI = 1.23–2.85) and depression at baseline leading to tobacco use at follow-up (OR = 1.22, CI = 1.09–1.37). A unidirectional relationship was also observed with cannabis use leading to depression (OR = 1.33, CI = 1.19–1.49). Conclusion: This study offers insights into the association and directionality between mental health disorders and substance use among adolescents and young adults. Our findings can help guide key stakeholders in making recommendations for interventions, policy and programming.

scholarly journals Sample-Selection Biases and the Industrialization Puzzle

2017 ◽  
Vol 77 (1) ◽  
pp. 171-207 ◽  
Author(s):  
Howard Bodenhorn ◽  
Timothy W. Guinnane ◽  
Thomas A. Mroz
Keyword(s):  
United States ◽  
Selection Bias ◽  
Meta Analysis ◽  
Sample Selection ◽  
Well Being ◽  
The United States ◽  
Compelling Evidence ◽  
Long Term Changes ◽  
The U.S

Understanding long-term changes in human well-being is central to understanding the consequences of economic development. An extensive anthropometric literature purports to show that heights in the United States declined between the 1830s and the 1890s, which is when the U.S. economy modernized. Most anthropometric research contends that declining heights reflect the negative health consequences of industrialization and urbanization. This interpretation, however, relies on sources subject to selection bias. Our meta-analysis shows that the declining height during industrialization emerges primarily in selected samples. We also develop a parsimonious diagnostic test that reveals, but does not correct for, selection bias in height samples. When applied to four representative height samples, the diagnostic provides compelling evidence of selection.

Corn Yield Response to Managed Drainage and Polymer-Coated Urea

2015 ◽  
Vol 107 (2) ◽  
pp. 435-441 ◽  
Author(s):  
Patrick R. Nash ◽  
Kelly A. Nelson ◽  
Peter P. Motavalli ◽  
Stephen H. Anderson
Keyword(s):  
Yield Response ◽  
Corn Yield ◽  
Coated Urea ◽  
Polymer Coated Urea
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