Institution
University of Agricultural Sciences, Dharwad
Education•Hubli, India•
About: University of Agricultural Sciences, Dharwad is a education organization based out in Hubli, India. It is known for research contribution in the topics: Population & Agriculture. The organization has 9558 authors who have published 9300 publications receiving 155603 citations.
Topics: Population, Agriculture, Soil water, Germination, DPPH
Papers published on a yearly basis
Papers
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TL;DR: In this paper, the authors reveal possible causes and processes leading to priming actions using the references on agricultural ecosystems and model experiments, and summarize in Tables for positive and negative real and apparent priming effects induced after the addition of different organic and mineral substances to the soil.
Abstract: Priming effects are strong short-term changes in the turnover of soil organic matter caused by comparatively moderate treatments of the soil. In the course of priming effects large amounts of C, N and other nutrients can be released or immobilized in soil in a very short time. These effects have been measured in many field and laboratory experiments; however, only a few of the studies were aimed at an extended investigation of the mechanisms of such phenomena. The aim of this overview is to reveal possible causes and processes leading to priming actions using the references on agricultural ecosystems and model experiments. Multiple mechanisms and sources of released C and N are presented and summarized in Tables for positive and negative real and apparent priming effects induced after the addition of different organic and mineral substances to the soil. Soil microbial biomass plays the key role in the processes leading to the real priming effects. The most important mechanisms for the real priming effects are the acceleration or retardation of soil organic matter turnover due to increased activity or amount of microbial biomass. Isotopic exchange, pool substitution, and different uncontrolled losses of mineralized N from the soil are responsible for the apparent N priming effects. Other multiple mechanisms (predation, competition for nutrients between roots and microorganisms, preferred uptake, inhibition, etc.) in response to addition of different substances are also discussed. These mechanisms can be distinguished from each other by the simultaneous monitoring of C and N release dynamics; its comparison with the course of microbial activity; and by the labelling of different pools with 14 C or 13 C and 15 N. Quantitative methods for describing priming effects and their dynamics using 14 C and 15 N isotopes, as well as for non-isotopic studies are proposed.
2,388 citations
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TL;DR: In this article, the authors developed and tested a sequential extraction procedure (SEP) for As by choosing extraction reagents commonly used for sequential extraction of metals, Se and P, including NH 4 NO 3, NaOAc, NH 2 OH·HCl, EDTA, NH 4 OH and NH 4 F, were shown to either have only low extraction efficiency for As, or to be insufficiently selective or specific for the phases targeted.
1,137 citations
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TL;DR: Play, affiliative behaviors and some vocalizations appear to be the most promising convenient indicators for assessing positive experiences in laboratory and farm animals under commercial conditions.
1,086 citations
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TL;DR: In this paper, the authors present a review of the literature on the analysis of profile measurements and the use of parameterisations and simple models, and suggest for the preprocessor development and for future research activities.
898 citations
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United States Environmental Protection Agency1, Environment Canada2, Norwegian Institute for Air Research3, Ontario Ministry of the Environment4, Syracuse University5, Finnish Environment Institute6, Norwegian Institute for Water Research7, University of Maine8, University College London9, United States Geological Survey10, Fisheries and Oceans Canada11, Wisconsin Department of Natural Resources12, University of Agricultural Sciences, Dharwad13
TL;DR: This article analyzed regional trends between 1980 and 1995 in indicators of acidification (sulphate, nitrate and base-cation concentrations, and measured (Gran) alkalinity) for 205 lakes and streams in eight regions of North America and Europe.
Abstract: Rates of acidic deposition from the atmosphere (‘acid rain’) have decreased throughout the 1980s and 1990s across large portions of North America and Europe1,2. Many recent studies have attributed observed reversals in surface-water acidification at national3 and regional4 scales to the declining deposition. To test whether emissions regulations have led to widespread recovery in surface-water chemistry, we analysed regional trends between 1980 and 1995 in indicators of acidification (sulphate, nitrate and base-cation concentrations, and measured (Gran) alkalinity) for 205 lakes and streams in eight regions of North America and Europe. Dramatic differences in trend direction and strength for the two decades are apparent. In concordance with general temporal trends in acidic deposition, lake and stream sulphate concentrations decreased in all regions with the exception of Great Britain; all but one of these regions exhibited stronger downward trends in the 1990s than in the 1980s. In contrast, regional declines in lake and stream nitrate concentrations were rare and, when detected, were very small. Recovery in alkalinity, expected wherever strong regional declines in sulphate concentrations have occurred, was observed in all regions of Europe, especially in the 1990s, but in only one region (of five) in North America. We attribute the lack of recovery in three regions (south/central Ontario, the Adirondack/Catskill mountains and midwestern North America) to strong regional declines in base-cation concentrations that exceed the decreases in sulphate concentrations.
844 citations
Authors
Showing all 9566 results
Name | H-index | Papers | Citations |
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Agneta Oskarsson | 106 | 766 | 40524 |
Muhammad Ashraf | 100 | 1541 | 57240 |
Andreas Stohl | 95 | 425 | 35060 |
Ulf Lindahl | 92 | 268 | 28407 |
Robert S. Hodges | 90 | 494 | 28812 |
Mats Nilsson | 83 | 529 | 24887 |
Hermann Katinger | 78 | 389 | 27589 |
Friedrich Altmann | 74 | 290 | 16454 |
Hjalmar Laudon | 72 | 350 | 18119 |
Uwe B. Sleytr | 72 | 396 | 19588 |
Jan Seibert | 69 | 285 | 17698 |
Seid Mahdi Jafari | 69 | 403 | 17981 |
Lam-Son Phan Tran | 68 | 251 | 18220 |
Heriberto Rodriguez-Martinez | 68 | 486 | 16611 |
Hans Lischka | 67 | 373 | 16882 |