Journal ArticleDOI
Acidity Produced by Leguminous Plants through Symbiotic Dinitrogen Fixation
TLDR
In general, the excess bases and the excess Base/nitrogen ratio varied considerably among harvests, and significant positive relationships between total N and proton efflux excess base excretion and H+ excretion were observed.Abstract:
Red clover (Trifolium prateuse L.), sweet clover (Meliotus alba Medik.). alfalfa (Medicago sativa L.), and crown vetch (Vica villosa Roth) were grown in nitrogen-free Hoagland's solution in a declining nutrient condition. Increases in acidity of the nutrient solutions were recorded over the experimental period. In general, the excess bases and the excess bases/nitrogen ratio varied considerably among harvests. Significant positive relationships between total N and proton efflux excess bases and H+ excretion, and dry weight and H+ efflux were observed (...)read more
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Book ChapterDOI
Soil acidification and liming interactions with nutrientand heavy metal transformationand bioavailability
TL;DR: In this paper, a review brings together fundamental aspects of soil acidification and recent developments on the implications of liming in relation to soil processes, particularly nutrient and heavy metal transformation and bioavailability in soils.
Journal ArticleDOI
Processes of soil acidification during nitrogen cycling with emphasis on legume based pastures
TL;DR: In this article, a review of the processes of H+ ions release during N cycling and its effect on soil acidification is examined, which is mainly caused by the release of protons (H+) during the oxidation of carbon (C), sulphur (S) and nitrogen (N) compounds in soils.
Journal ArticleDOI
Dynamics and transformations of micronutrients in agricultural soils as influenced by organic matter build-up: A review
TL;DR: The dynamics and transformations of micronutrients (Zn, Cu, Fe, Mn, B and Mo) in soils, are governed by various factors like pH, EC, soil organic matter etc as mentioned in this paper.
Role of carbon, nitrogen, and sulfur cycles in soil acidification.
Nanthi Bolan,Mike Hedley +1 more
Abstract: Under areas where rainfall exceeds evapotranspiration, soil acidification is an ongoing process that can be either accelerated by the activity of plants, animals, and
humans or slowed down by careful management practices [1,2]. In areas that remain unaffected by industrial pollution, soil acidification is mainly caused by the
release of protons (H) during the transformation and cycling of carbon (C), nitrogen (N), and sulfur (S) in the soil-plant-animal system [3,4]. Under managed
systems much of the accelerated soil acidification is caused by increasing N and
S inputs into the farming system (Table 1). For example, in areas of Australia
where legumes have been grown continuously for more than 30 years, the soil pH
has decreased by about one unit [5-10]. Similarly, in New Zealand, intensively
managed legume-based dairy pastures require applications of approximately 2.5
tons of lime per ha every 6 years [11,12] to neutralize acidity mostly generated
through loss of N from an accelerated N cycle.