Ammonia-oxidizing bacteria play an important role in nitrification of acidic soils: A meta-analysis

Geoderma ◽  
2021 ◽  
Vol 404 ◽  
pp. 115395
Author(s):  
Yongxin Lin ◽  
Hang-Wei Hu ◽  
Guiping Ye ◽  
Jianbo Fan ◽  
Weixin Ding ◽  
...  
2016 ◽  
Vol 99 ◽  
pp. 158-166 ◽  
Author(s):  
Chelsea J. Carey ◽  
Nicholas C. Dove ◽  
J. Michael Beman ◽  
Stephen C. Hart ◽  
Emma L. Aronson

2013 ◽  
Vol 22 (2) ◽  
pp. 208-222 ◽  
Author(s):  
Elena Valkama ◽  
Tapio Salo ◽  
Martti Esala ◽  
Eila Turtola

We reviewed quantitatively 40 Finnish field experiments related to the effect of nitrogen (N) fertilizer on the main parameters of grain quality and N uptake of spring cereals. The experiments were conducted on a wide range of mineral soils under varying growth conditions from the 1950s to the 1990s. Overall there was no statistically significant effect on 1000 grain weight and a slightly negative effect on grain test weight. Nitrogen fertilizer increased N uptake much more steeply in slightly acidic soils (SA, pH 5.8–6.9), located mostly in South Finland, than in moderately acidic soils (MA, pH 5.0–5.7), located in Central Finland. With increasing N rates, protein content increased to a larger extent in spring barley and oats than in spring wheat. In the light of the current trend to reduce N fertilizerapplication, the obtained regressions between N rates and the parameters of grain quality may be used to maintain yield quality at a desirable level, while optimizing N management.


2015 ◽  
Vol 85 ◽  
pp. 21-29 ◽  
Author(s):  
Jing Che ◽  
Xue Qiang Zhao ◽  
Xue Zhou ◽  
Zhong Jun Jia ◽  
Ren Fang Shen

2021 ◽  
Author(s):  
Yali Wei ◽  
Yan Meng ◽  
Na Li ◽  
Qian Wang ◽  
Liyong Chen

The purpose of the systematic review and meta-analysis was to determine if low-ratio n-6/n-3 long-chain polyunsaturated fatty acid (PUFA) supplementation affects serum inflammation markers based on current studies.


2013 ◽  
Vol 18 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Robert J. Barth

Abstract Scientific findings have indicated that psychological and social factors are the driving forces behind most chronic benign pain presentations, especially in a claim context, and are relevant to at least three of the AMA Guides publications: AMA Guides to Evaluation of Disease and Injury Causation, AMA Guides to Work Ability and Return to Work, and AMA Guides to the Evaluation of Permanent Impairment. The author reviews and summarizes studies that have identified the dominant role of financial, psychological, and other non–general medicine factors in patients who report low back pain. For example, one meta-analysis found that compensation results in an increase in pain perception and a reduction in the ability to benefit from medical and psychological treatment. Other studies have found a correlation between the level of compensation and health outcomes (greater compensation is associated with worse outcomes), and legal systems that discourage compensation for pain produce better health outcomes. One study found that, among persons with carpal tunnel syndrome, claimants had worse outcomes than nonclaimants despite receiving more treatment; another examined the problematic relationship between complex regional pain syndrome (CRPS) and compensation and found that cases of CRPS are dominated by legal claims, a disparity that highlights the dominant role of compensation. Workers’ compensation claimants are almost never evaluated for personality disorders or mental illness. The article concludes with recommendations that evaluators can consider in individual cases.


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