Results 21 to 30 of about 3,638 (183)

Use of biologically active substances in hops

open access: yesPlant, Soil and Environment, 2018
In four-year experiments, hop was treated with 7 biologically active substances in two terms during vegetation: Lignohumate max (a mixture of humic acids and fulvic acids), Lexin (a mixture of humic acids and fulvic acids enriched with auxins), Lexenzym (
Pavel PROCHÁZKA   +4 more
doaj   +1 more source

Influence of humus acids on mobility and biological availability of iron, zinc and copper

open access: yesAgricultural Science and Practice, 2015
Soil organic matter is known as an important condition for the mobility of trace elements in soils, their geo- chemical migration and availability to plants.
A. Fateev   +3 more
doaj   +1 more source

Biostimulants derived from organic urban wastes and biomasses: An innovative approach

open access: yesFrontiers in Chemistry, 2023
We used humic and fulvic acids extracted from digestate to formulate nanohybrids with potential applications in agronomy. In order to obtain a synergic co-release of plant-beneficial agents, we functionalized with humic substances two inorganic matrixes:
Alessia Giordana   +5 more
doaj   +1 more source

Field Efficiency of Humic Substances, Boric Acid and some Novel Insecticides against Aphis gossypii Glover and Bemisia tabaci (Gennadius) on Cotton Plants [PDF]

open access: yesJournal of Plant Protection and Pathology, 2018
Nutritive acids improve the plant growth via increasing its carbohydrates content and nutrients uptake, and enhance the plant resistance to biotic and a biotic stress factors.
Madeha El - Dewy, E. El - Zahi
doaj   +1 more source

Heavy metal distribution between fractions of humic substances in heavily polluted soils

open access: yesPlant, Soil and Environment, 2004
Soil organic matter is important in controlling heavy metal behaviour in soils. This study aims to determine the distribution of organically bound Cd, Pb, and Zn between humic and fulvic acids in 20 samples of heavily polluted Fluvisols.
L. Borůvka, O. Drábek
doaj   +1 more source

Emulsifying Effect of Fulvic Acids from Shilajit

open access: yesChemistry Proceedings, 2022
Shilajit, also known in the north of India as salajit, shilajatu, mimie, or mummiyo, is a blackish-brown powder or an exudate from high mountain rocks, especially in the Himalayans mountains between India and Nepal [...]
Denisa-Ioana Gheorghe   +3 more
doaj   +1 more source

Qualitative composition of humus and physical and chemical properties of typical chernozem depending on the fertiliser system

open access: yesРослинництво та ґрунтознавство, 2023
The soil-forming process is closely related to the accumulation and circulation of organic substances, which are a source of nutrients for plants released during the mineralisation of humus, so research on determining the qualitative composition of humus
M. Voitovyk   +3 more
doaj   +1 more source

Molecular-mass distribution of humic substances from Arctic soils according to size exclusion chromatography

open access: yesPolish Polar Research, 2020
Humic substances are polydisperse mixtures of structurally complex matters with different molecular weights. The complexity of molecular composition of humic substances is reflected through their physical and chemical properties and results in diverse ...
Lodygin, Evgeny, Vasilevich, Roman
doaj   +1 more source

New possibility for characterization of dissociation behaviour of supramolecular electrolytes: results obtained for the International Humic Substances Society standard and reference samples by coulometry

open access: yesChemical and Biological Technologies in Agriculture, 2021
Background Humic substances can be considered as polyelectrolytes with supramolecular character and complicated behaviour in water environment. The fractions of humic substances dissolved in water are the most active ones and determinative for their ...
Martina Klučáková
doaj   +1 more source

Humic substances and rhizobacteria enhance the yield, physiology and quality of strawberries

open access: yesNotulae Botanicae Horti Agrobotanici Cluj-Napoca, 2022
The strawberry fruit (Fragaria × ananassa Duch.) is appreciated for its aroma, color, texture and nutritional value. In conventional agriculture, the use of fertilizers damages the environment since it causes loss of soil fertility, salinity and its ...
Simeón MARTÍNEZ-DE LA CRUZ   +6 more
doaj   +1 more source

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