Results 21 to 30 of about 493,503 (195)

Impact of humic substances and nitrogen fertilising on the fruit quality and yield of custard apple

open access: yesActa Scientiarum. Agronomy, 2014
The custard apple (Annona squamosa L.), also known as the sugar apple, is a fruit species native to Brazil that has been poorly studied, especially in relation to the effect of humic substances on its fruit quality and yield.
Marcelo dos Santos Cunha   +4 more
doaj   +1 more source

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   +1 more source

Reduced adsorption of caesium on clay minerals caused by various humic substances [PDF]

open access: yes, 1999
The effect of the addition of various humic substances on the adsorption of caesium on two mineral clays has been studied. All measurements were carried out in dilute suspension under controlled conditions of temperature and ionic strength.
Dumat, Camille   +4 more
core   +1 more source

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

Humic substances [PDF]

open access: yesEnvironmental Science and Pollution Research, 2007
Freshwater bodies which chemistry is dominated by dissolved humic substances (HS) seem to be the major type on Earth, due to huge non-calcareous geological formations in the Northern Hemisphere and in the tropics. Based on the paradigm of the inertness of being organic, direct interactions of dissolved HS with freshwater organisms are mostly neglected.
Christian E W, Steinberg   +4 more
openaire   +4 more sources

Improving Lowland Rice (O. sativa L. cv. MR219) Plant Growth Variables, Nutrients Uptake, and Nutrients Recovery Using Crude Humic Substances

open access: yesThe Scientific World Journal, 2015
High cation exchange capacity and organic matter content of crude humic substances from compost could be exploited to reduce ammonia loss from urea and to as well improve rice growth and soil chemical properties for efficient nutrients utilization in ...
Perumal Palanivell   +4 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

Humic substances of differently matured composts produced from municipal solid wastes and biomass of energetic plants

open access: yesSoil Science Annual, 2019
The aim of the study was to assess the transformation of humic substances during composting of biomass of energetic plants and municipal solid waste. The type of the organic material to be composted and the type of technology used affect the course of ...
Kałuża-Haładyn Andrea   +2 more
doaj   +1 more source

Humic matter and contaminants: general aspects and modeling metal ion binding [PDF]

open access: yes, 2001
Humic substances are soil and fresh-water components that play an important role in the binding and transport of both organic and inorganic contaminants.
Kinniburgh, David G.   +6 more
core   +1 more source

Evaluation of Commercial Humic Substances and Other Organic Amendments for the Immobilization of Copper Through 13C CPMAS NMR, FT-IR, and DSC Analyses

open access: yesAgronomy, 2019
The application of organic amendments to contaminated agricultural lands can immobilize metals and improve soil conditions. The chemical structures and long-term stability of commercial humic substances and other composted organic amendments (sheep and ...
Begoña Mayans   +4 more
doaj   +1 more source

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