Results 11 to 20 of about 1,461,675 (351)

Concepts and Misconceptions of Humic Substances as the Stable Part of Soil Organic Matter: A Review

open access: yesAgronomy, 2018
In the last three decades, the concept of soil humic substances has been questioned in two main directions. Misinterpretations of CP MAS13C NMR spectroscopy led to the conclusion that soil organic matter is mainly aliphatic, questioning the theory of ...
Jörg Gerke
doaj   +2 more sources

Humic Substances Mediate Anaerobic Methane Oxidation Linked to Nitrous Oxide Reduction in Wetland Sediments

open access: yesFrontiers in Microbiology, 2020
Humic substances are redox-active organic molecules, which play pivotal roles in several biogeochemical cycles due to their electron-transferring capacity involving multiple abiotic and microbial transformations.
Edgardo I. Valenzuela   +5 more
doaj   +2 more sources

Chemical Structure and Biological Activity of Humic Substances Define Their Role as Plant Growth Promoters

open access: yesMolecules, 2021
Humic substances (HS) are dominant components of soil organic matter and are recognized as natural, effective growth promoters to be used in sustainable agriculture. In recent years, many efforts have been made to get insights on the relationship between
S. Nardi, M. Schiavon, O. Francioso
semanticscholar   +1 more source

Natural and artificial humic substances to manage minerals, ions, water, and soil microorganisms.

open access: yesChemical Society Reviews, 2021
The chemistry of humic substances (HSs) occurs hidden from our sight, but is of key importance to agriculture and the environment, and nowadays even to medicine and technology.
Fan Yang, Chunyu Tang, M. Antonietti
semanticscholar   +1 more source

Contribution of exogenous humic substances to phosphorus availability in soil-plant ecosystem: A review

open access: yesCritical reviews in environmental science and technology, 2022
Phosphorus (P) is one of the largest nutrients limiting crop productivity. Meanwhile, P deficiency is a common phenomenon in agricultural soils around the world.
Y. Yuan   +4 more
semanticscholar   +1 more source

Synergistic Release of Crop Nutrients and Stimulants from Hydroxyapatite Nanoparticles Functionalized with Humic Substances: Toward a Multifunctional Nanofertilizer

open access: yesACS Omega, 2020
The use of salt- or macro-sized NPK fertilizers is typically associated with low nutrient use efficiency and water eutrophication. Nanotechnology can overcome such drawbacks, but its practical application on a large scale is limited by (i) high costs and
Ho Young Yoon   +7 more
semanticscholar   +1 more source

Structural characterization of humic acids, extracted from sewage sludge during composting, by thermochemolysis–gas chromatography–mass spectrometry [PDF]

open access: yes, 2006
Thermochemolysis coupled with gas chromatography and mass spectrometry were applied to determine the structure of humic acids (HA) extracted from a sewage sludge and straw mixture at different steps of composting.
Amblès, André   +8 more
core   +8 more sources

Characterization of Humic Substance Extracted from Andisols, Spodosols, Peat, and Lignite

open access: yesSains Tanah: Journal of Soil Science and Agroclimatology, 2018
Soil and other materials with high C-organic content are potential natural sources of humic substances. Until now the differences in the characteristics of such humic substances that are extracted from different sources have not been widely studied. Thus,
Eka Rahmi   +2 more
doaj   +1 more source

Influence of humic substances and biochar on the yield of cantaloupe (Cucumis melo L.) in organic management systems

open access: yesTechnology in Horticulture, 2023
Biostimulants are biological additives that are used in crop production to improve plant growth, productivity, and health. This research aimed to study the effects of cantaloupe (Cucumis melo L.) production in organic management systems influenced by ...
ZaDarreyal Wiggins   +3 more
doaj   +1 more source

Influence de l'origine et de la nature des substances humiques sur l'adsorption de l'atrazine sur charbon actif en poudre [PDF]

open access: yes, 1993
Les essais d'adsorption sur charbon actif en poudre, de sept acides humiques (H) ou fulviques (F) et pour trois pH (5,6 ; 7,0 ; 8,8) marquent que ces acides ont un comportement différent suivant leur origine.Lorsque le pH de la suspension de charbon est ...
Ayele, J., Fabre, B., Mazet, M.
core   +1 more source

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