Effects of Urea and Di-Ammonium Phosphate Application on Acidification of three Burundi representative Soils

Salvator, Kaboneka; Ong'or, Basil T. Iro; Chantal, Kwizera; Nsavyimana, Gaston; Donatien, Buzoya; Népomuscène, Ntukamazina

doi:10.31695/ijasre.2019.33474

Cited by 4 publications

(3 citation statements)

References 16 publications

(18 reference statements)

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“…The second explanation is agricultural intensification (Dar et al., 2021), which attempts to increase yield through the use of physiologically acidic fertilizers. Long‐term application of urea [(NH 2 ) 2 CO] (Ge et al., 2018) and diammonium phosphate [(NH 4 ) 2 HPO 4 ] in soil result in high H + concentrations, which lower pH (Laekemariam & Kibret, 2021; Salvator et al., 2019). The type of parent material is also important.…”

Section: Resultsmentioning

confidence: 99%

“…Much of the soil in the study areas (31.17%) was acidic (extremely acidic and strongly acidic) (Figure 4). This could be due to climate factor and cultivation intensity (Ma et al, 2022), crop type and use of inorganic fertilizers (Salvator et al, 2019;Yadav et al, 2020), and soil and water conservation practices, all of which could contribute to the higher acidity in the study area.…”

Section: Descriptive Statistics Of Soil Phmentioning

confidence: 99%

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Soil pH mapping as a function of land use, elevation, and rainfall in the lake tana basin, northwestern of ethiopia

Belay,

Selassie,

Tsegaye

et al. 2023

Agrosystems Geosci & Env

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Soil acidity has become a serious problem in the northern highlands of Ethiopia, limiting land productivity mainly that of crop yield. Research had been done to try to come up with results showing the area was affected by severe acidity, but based on few watersheds and districts in a haphazard way. The objective of this research was therefore to develop a comprehensive soil pH map that covers a broader area of 27 districts covering 2,810,055 ha of land to assess the degree of soil acidity in the Tana Sub‐basin, northwestern highlands of Ethiopia. Using GPS (3‐m precision), 2652 soil point data were collected. Precipitation, elevation, and land use cover were taken into account when creating an interpolated soil pH map. Using adjacent probed pH values, ordinary kriging interpolation (R2 = 0.65; root‐mean‐square error = 0.37125) technique was used to estimate the unmeasured locations, while the spatial pH variability was mapped using the geostatistical (GS+10) software. All Food and Agriculture Organization of the United Nations soil pH categories, with 11.22%, 19.97%, 18.77%, 14.59%, 9.64%, and 6.29% of the soil samples being extremely acidic, strongly acidic, moderately acidic, slightly acidic, neutral, moderately alkaline and strongly alkaline, respectively, were observed. The interpolation result showed a moderate coefficient of variation (10.52%) indicating that the research area had medium variability. In addition, the nugget‐to‐total semivariance ratio ranged from 25% to 75%, indicating moderate geographic dependence. The pH semivariograms best fitted the exponential model, which means the one with maximum (R2 = 0.834) and with minimum residual sum of squares (1.819E‐06) value for mapping of pH. Our result showed that soil pH was inversely dependent on precipitation and altitude, while it varies with land use type. The research result/map could give useful tools for effective integrated land management to minimize soil acidification by policymakers, agriculturalists, and other stakeholder groups. We also recommended future routine updates on the size and distribution of surface soil acidity in the study area.

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Section: Resultsmentioning

confidence: 99%

Section: Descriptive Statistics Of Soil Phmentioning

confidence: 99%

Soil pH mapping as a function of land use, elevation, and rainfall in the lake tana basin, northwestern of ethiopia

Belay,

Selassie,

Tsegaye

et al. 2023

Agrosystems Geosci & Env

View full text Add to dashboard Cite

show abstract

“…On the other hand, sole application of DAP lowered soil pH due to its acidifying character. This is because this fertilizer promotes nitrification leading to a lower soil pH [48] [54]. However, integration of biochar and DAP showed an increase in soil pH.…”

Section: Soil Phmentioning

confidence: 99%

Effect of Biochar and Inorganic Fertilizer on Soil Biochemical Properties in Njoro Sub-County, Nakuru County, Kenya

Mbabazize,

Mungai,

Ouma

2023

OJSS

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Declining soil fertility is a major constraint to potato farming, the second most important food crop in Kenya. The objective of the study was to determine the effect of different rates of biochar and inorganic fertilizer on some soil properties; soil pH, soil phosphomonoesterases, inorganic nitrogen and extractable phosphorus. The study was conducted for two seasons (short and long rains) at two locations (Egerton University agricultural field and farmer's field in Mau Narok) using a split-plot design in a randomized complete block (RCBD) arrangement with variety as the main plot and soil amendments as the subplot. Biochar and Diammonium Phosphate (DAP) at 0, 5, and 10 t•ha −1 and 0, 250, and 500 kg•ha −1 respectively, were applied, resulting in nine treatment combinations. Two potato varieties (Shangi and Destiny)were used in the study. A combination of 5 t•ha −1 biochar and 500 kg•ha −1 DAP and sole application of biochar at 5 t•ha −1 resulted in an increase of 1.25, 2.54 units in soil pH in two seasons, respectively. Similarly, a combination of 5 t•ha −1 biochar and 250 kg•ha −1 DAP increased soil available phosphorus by 105 units from 30.7 mg•kg −1 to 136 mg•kg −1 . The application rate of 5 t•ha −1 biochar with 250 or 500 kg•ha −1 DAP significantly increased soil nitrate by 102.11 and 116.14 units, respectively. Soils amended with biochar at 5 t•ha −1 combined with 500 kg•ha −1 DAP, 10 t•ha −1 of biochar combined with either 250 kg or 500 kg of DAP gave the highest alkaline enzymes (mM pNP × kg −1 × h −1 ). However, the highest acid soil phosphomonoesterases were obtained under the sole application of DAP at 500 ha −1 . Thus, using biochar with chemical fertilizer seems a plausible option to ameliorate the declining nutrient base of farmland in Kenya, which could sustainably support potato growth.

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Spatial analysis of some soil chemical properties of the Amhara region in Ethiopia

Belay,

Selassie,

Tsegaye

et al. 2024

Arab J Geosci

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Effects of Urea and Di-Ammonium Phosphate Application on Acidification of three Burundi representative Soils

Cited by 4 publications

References 16 publications

Soil pH mapping as a function of land use, elevation, and rainfall in the lake tana basin, northwestern of ethiopia

Soil pH mapping as a function of land use, elevation, and rainfall in the lake tana basin, northwestern of ethiopia

Effect of Biochar and Inorganic Fertilizer on Soil Biochemical Properties in Njoro Sub-County, Nakuru County, Kenya

Spatial analysis of some soil chemical properties of the Amhara region in Ethiopia

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