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Haynes, Richard; Naidu, Ravi

doi:10.1023/a:1009738307837

Cited by 1,111 publications

(224 citation statements)

References 80 publications

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“…Oades, Gillman and Uehara (1989) noted that applying extra levels of organic residues can lead to acidification due to nitrification. Application of extra amounts of carbon can also result in the crusting of soil surface, decreased hydraulic conductivity, and increased run-off (Haynes & Naidu, 1998). The minimum and maximum SOC thresholds at which soils can support crop production while sustaining a friendly environment remain a less explored option in tropical soils.…”

Section: Defining Soil Organic Carbon Thresholdsmentioning

confidence: 99%

See 1 more Smart Citation

Soil Organic Carbon Thresholds and Nitrogen Management in Tropical Agroecosystems: Concepts and Prospects

Mazellier¹,

Tenywa²,

Ebanyat³

et al. 2013

JSD

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Soil organic carbon (SOC) is a potential soil fertility indicator for regulating nitrogen application in tropical farming systems. However, there are limited studies that have discussed SOC thresholds above or below which crop production could be diminished, or at which no or high response to nitrogen (N) application can be realized. This review explores the drivers of SOC concentration relevant for the establishment of thresholds. We further evaluate existing SOC thresholds for provoking no yield response or significant response to added N fertilizer. Key drivers for SOC concentration relevant in establishing thresholds are mainly climate, topography, texture, and land use management. Soil organic carbon threshold for sustaining soil quality is widely suggested to be about 2% below which deterioration may occur. For added N fertilizer management, specific SOC thresholds seem quite complex and are only valid after assuming other factors are non-limiting. In some soils, SOC levels as low as 0.5% result in fertilizer responses and soils as high as 2% SOC also respond to small N doses. Minimum SOC thresholds can be identified for a given soil type, but maximum thresholds depend on crop N requirements, crop N use efficiency and amount of N applied. However, there seem to exist critical total SOC ranges that could be targeted for optimal indigenous N supply and integrative soil functional benefits. These can be targeted as minimum levels in soil fertility restoration. In all, it is still difficult to establish a single minimum or maximum SOC threshold value that can be universally or regionally accepted.

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Section: Defining Soil Organic Carbon Thresholdsmentioning

confidence: 99%

“…SOC levels above 2% were very stable. For water holding capacity, variations in SOC also influence soil water retention (Haynes & Naidu, 1998). Depending on amount of C present in these fractions, high levels can lead to high water retention.…”

Section: Soil Organic Carbon Thresholds and Soil Propertiesmentioning

confidence: 99%

Soil Organic Carbon Thresholds and Nitrogen Management in Tropical Agroecosystems: Concepts and Prospects

Mazellier¹,

Tenywa²,

Ebanyat³

et al. 2013

JSD

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“…Organic amendments like these benefit soils. Manure added to soils decreases bulk density and increases soil organic C, particularly in the short term (Haynes and Naidu 1998;Edmeades 2003). Dairy manure typically increases bacterial populations and the substrate diversity for microbes (Larkin et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Winter and growing season nitrogen mineralization from fall-applied composted or stockpiled solid dairy manure

Lehrsch

Brown

Lentz

et al. 2016

Nutr Cycl Agroecosyst

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Adequate characterization of nitrogen (N) mineralization with time from manure and other organic sources is needed to maximize manure N use efficiency, decrease producer costs, and protect groundwater quality. The objective of our 2-year field study at Parma, ID, was to quantify in situ N mineralization with time as affected by a one-time fall application of solid dairy manure, either composted or stockpiled. The experiment included five treatments: a non-N fertilized control, two first-year rates of stockpiled solid dairy manure (21.9 and 43.8 Mg ha -1 , dry wt.) and two rates (53.1 and 106.1 Mg ha -1 , dry wt.) of composted dairy manure (hereafter termed compost). Net N mineralized (mineralization less immobilization) was determined to a depth of 0.3 m by repeatedly measuring soil inorganic N (NH 4 -N ? NO 3 -N) concentrations in buried polyethylene bags. Overwinter mineralization was measured between amendment incorporation in fall and sugarbeet (Beta vulgaris L.) planting the following spring. In-season mineralization was measured in situ for seven consecutive incubation periods during the c. 220-day growing season for furrow-irrigated sugarbeet. Net N mineralized often varied among amendments and from year to year through mid-season, likely due to seasonal variation in soil temperature, annual differences in amendment properties, and other factors.

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“…Long-term fertilizer applications have been reported to cause increases in water-stable aggregation, porosity, infiltration capacity and hydraulic conductivity, and decreases in bulk density (Haynes and Naidu 1998). A number of workers have investigated the use of phosphoric acid as an agent for promoting aggregate stability in soils (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…A number of workers have investigated the use of phosphoric acid as an agent for promoting aggregate stability in soils (e.g. Thien 1976;Yeoh and Oades 1981) where other phosphatic fertilizers have no effect (Haynes and Naidu 1998). On the other hand, other researchers have reported that phosphate sorption induces mobilization of colloids and colloidal phosphate, and phosphate accumulation in soils increases the risk of colloid-facilitated leaching of phosphate (Siemens et al 2004;Jianhong and Packman 2005;Scalenghe et al 2007;Calero et al 2008;Ilg et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Influence of phosphate sorption on dispersion of a Ferralsol

Pham

Ishiguro

Tran

et al. 2014

Soil Science and Plant Nutrition

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Soil dispersion induces soil erosion and colloidal leaching. Nutrients are lost at the same time and this causes water contamination. Phosphate is an essential element for living organisms. Because phosphate influences soil dispersion and it is an important limited resource, this influence must be evaluated well in order to diminish negative effects on soil structure. In this paper, we firstly evaluated the influence of phosphate sorption on soil dispersion by calculating repulsive potential energy between soil particles. Ferralsol, which is a typical soil in rainy tropical regions, was used as the material. The dispersion-flocculation phenomena were investigated with absorbance of soil suspension under different pH, phosphate adsorption and electrolyte concentration in an Na-NO 3 -PO 4 system. The repulsive potential energy was calculated based on the diffuse double layer theory and the measured zeta potential. We indicated that the measured absorbance increased with the increase of the repulsive potential energy. The repulsive potential energy increased with increasing phosphate sorption up to about 5 to 20 mmol kg −1 at all pH, and it induced the soil dispersion, because phosphate sorption increased the negative charge of the soil. After its peak, it decreased with increasing phosphate sorption because the electrolyte concentration increased and the electrolyte screened the electric field near the soil surface. The repulsive potential energy also increased with increasing pH because of the increase of the negative charge of the soil. Even at low pH, after a certain amount of phosphate sorption, the soil dispersed due to the increase of repulsive potential energy, although the soil flocculated before phosphate application. Because the soil dispersion causes soil and phosphorus loss, the influence of soil pH and phosphate sorption on the soil dispersion should be considered for good soil management.

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Untitled

Cited by 1,111 publications

References 80 publications

Soil Organic Carbon Thresholds and Nitrogen Management in Tropical Agroecosystems: Concepts and Prospects

Soil Organic Carbon Thresholds and Nitrogen Management in Tropical Agroecosystems: Concepts and Prospects

Winter and growing season nitrogen mineralization from fall-applied composted or stockpiled solid dairy manure

Influence of phosphate sorption on dispersion of a Ferralsol

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