A Perspective View of Nitrogen: Soil, Plants and Water

Lal, Bharat; Nayak, Vinod; Kumar, Abhishek; Kumar, Pavan

doi:10.1007/978-3-030-93258-9_7

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…It is imperative in agriculture, where it determines the availability of fertiliser nitrogen. Soil texture has been described to influence the NO 3 − mobility, and, in turn, nitrification rates are influenced by salinity, temperature, and pH [59]. Another parameter that can be analysed is soil organic carbon (SOC), characterised as the primary source of energy for soil-related microorganisms.…”

Section: Soil Healthmentioning

confidence: 99%

Digital Ecosystem Model for GIAHS: The Barroso Agro-Sylvo-Pastoral System

et al. 2022

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Globally Important Agricultural Heritage Systems (GIAHS) territories are highly relevant to achieving sustainable lifestyles with human subsistence in balance with the ecosystem. The Barroso agro-sylvo-pastoral system is a clear example of this alignment between existing society, nature and natural resources, the environment, landscapes, and contextual heritage. Moreover, the sustainable use of existing natural resources, excellent environmental conditions, and breath-taking untouched landscapes represent a truly relevant factor towards the development of a region economy that is still greatly influenced by an engraved cultural, patrimonial, and agricultural heritage. Given the GIAHS classification attributed to that territory, the need arises to guarantee the existing environmental conditions. This context will allow the maintenance of the GIAHS classification, ensuring the quality of life in the region and stimulating its socio-economic development and overall sustainability. The present article describes a proposal for a digital ecosystem model aimed at the Barroso GIAHS, composed of four main functional hubs that actively interact with each other: smart environment, smart government, smart economy, and smart people. Based on wireless sensor networks, IoT, artificial intelligence, data analytics, and other technological solutions, this solution will allow real-time control of the territory’s environmental conditions and develop more efficient and well-supported management and governance.

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Section: Soil Healthmentioning

confidence: 99%

Digital Ecosystem Model for GIAHS: The Barroso Agro-Sylvo-Pastoral System

et al. 2022

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“…NH 4 + and NO 3 − are the major plant-available forms of nitrogen that can be absorbed and utilized by plants [3]. The simultaneous availability and/or application of both NH 4 + and NO 3 − are recognized to better increase crop yield and quality [4].…”

Section: Introductionmentioning

confidence: 99%

Changes in Ammonium-to-Nitrate Ratio along Faidherbia albida Tree Age Gradients in Arenosols

Amare,

Haile,

Birhane

2024

Nitrogen

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Faidherbia albida can enhance the bio-physicochemical fertility of inherently infertile Arenosols. Changes in the soil ammonium (NH4+)-to-nitrate (NO3−) ratio have agricultural, environmental, and ecological implications. Thus, the present study mainly examined the changes in Arenosol NH4+/NO3− ratios, as influenced by varying Faidherbia albida tree age classes. We collected 40 composite soil samples (4 tree age classes×2 soil depths×5 replications) from 0 to 15 and 15 to 30 cm soil depths following core and auger sampling techniques. Analyses of variance have shown that the highest NH4+/NO3− ratios for soil under the old tree canopies are followed by the medium age. In contrast, the significantly lowest NH4+/NO3− ratios were recorded for soil out-of-canopy. Pearson correlation analysis revealed that the NH4+/NO3− ratio was strongly and positively correlated with clay content, total nematode abundance, the fungi/bacterial biomass ratio, cation exchange capacity, microbial biomass carbon, total nitrogen, and soil organic carbon but negative for sand content, bulk density, and pH. The increment in the plant-available forms of nitrogen might be attributed to the accumulation of biologically fixed nitrogen by the Faidherbia albida tree–Rhizobium bacteria symbiosis. The NH4+/NO3− ratio approached one in soil under the old Faidherbia albida trees. The findings suggest that (1) the ability of soil to retain NH4+ increased and (2) the rate of nitrification might be decreased due to inhibition of nitrification by direct and indirect effects of the tree on the nitrifying group of bacteria. The increment in the NH4+/NO3− ratio could also be due to the lowering of the soil’s pH in the older Faidherbia albida trees because lower pH is known to inhibit the activities of nitrifying bacteria. Moreover, maintaining older Faidherbia albida trees in farmlands could contribute to retaining nitrogen and trigger below- and above-ground communities’ successions and ultimately surpass the productivity of arid and semi-arid Arenosols.

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