Forms of nitrogen in waterlogged soils and their contribution to yield and nitrogen uptake by rice

Prasad, Shiv S.; Sarkar, Ashis; Sinha, N. P.

doi:10.1017/s0021859600066958

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…This could account for the low nitrogen content observed at the end of the trial period for reduced and highly reduced soils. However, Prasad et al (1986) reported that nitrogen in waterlogged soils is majorly in the form of ammonia (NH 4 ), volatilization of ammonia is rare, and the net effect of waterlogging is accumulation of ammonia (Philip and Greenway, 2008). This could account for the fact that reduced and highly reduced soils have more nitrogen contents than the oxidized soils.…”

Section: Effect Of Redox Potential On Soil Chemical Propertiesmentioning

confidence: 99%

Chemical Properties of Soil under Different Redox Potentials

Dayo-Olagbende

Sanni

Akingbola

et al. 2022

AIJNAS

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Aim: The experiment was setup in an attempt to determine the effect of redox potentials on soil chemical properties Mat and met: A 3 x 2 x 2 factorial experiment was conducted. The experiment was laid out in Randomized Complete Block Design (RCBD) and consisted of three factors namely: Poultry manure at three levels (0 tha-1, 6 tha-1 and 8 tha-1), NPK 15-15-15 at two levels (0 kgha-1 and 200 kgha-1) and watering regimes at two levels (waterlogged and field capacity). These factors were used to induce the various redox status of the soil. The combination of these variables resulted in twelve (12) treatments which were replicated three times and repeated. The soils were incubated for about three months after which data were collected on soil chemical properties. Data collected included total N, available P, exchangeable cations and organic matter content. Data collected were subjected to analysis of variance (ANOVA) using SPSS version 17 and means compared using Tukey Honesty Significant Difference (HSD) test to verify significant differences among treatments at 5% probability level. Graphs were generated using Microsoft excel 2010 edition. Result: The results of this research showed that redox potential causes changes in the chemical properties of the soils. There was significant difference (p < 0.05) in the nitrogen content among the treatments and the highest was moderately reduced soils being 62.5% greater than the oxidized soil that recorded the lowest. There was also significant difference (p < 0.05) in the available P which was highest under oxidized soils, being 76.4% greater than the highly reduced soil that recorded the lowest. Organic matter content was highest under highly reduced soil being 42.9% greater than the oxidized soil that recorded the lowest. There were also significant differences (p<0.05) among the treatments in terms of exchangeable cations. Exchangeable cations were lowest in soil under highly reduced conditions. Conclusion: It was concluded that the redox status of a soil is a fundamental property that has the tendency of affecting other soil chemical properties.

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Section: Effect Of Redox Potential On Soil Chemical Propertiesmentioning

confidence: 99%

Chemical Properties of Soil under Different Redox Potentials

Dayo-Olagbende

Sanni

Akingbola

et al. 2022

AIJNAS

View full text Add to dashboard Cite

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Section: Effect Of Redox Potential On Soil Chemical Propertiesmentioning

confidence: 99%

Effects of Road Infrastructure on Plantain Production among Farmers in Ekiti Southwest Local Government Area of Ekiti State, Nigeria

Tope-Oke¹,

Sanya²,

Ahmed³

2021

AIJNAS

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Studies on existing methods of analyses are still insufficient due to the lack of investigation of students’ performance pattern. Prior studies found that there is a limit in the existing systems that can be used to make a comparative analysis and monitoring of the student academic performance. To look into this problem, this study explores the possibility of analysing students’ performance pattern in higher institutions. A system based on Benford’s law was designed to analyse students’ performance pattern and the system was tested with students Cumulative Grade Point Average (CGPA). Python programming language, Malplot library, wxpython graphical user interface and Atom text and source code editor were used for developing and testing the application. After a couple of error debugging and fixes, a well-functioning application that met the requirements of the system was achieved. This study also features a spiral model which was adopted as the methodological approach in the development of the Benford’s Analysis system. The interaction between users and the Benford’s Analysis system was described. Furthermore, a brief description of Benford’s law, pattern recognition, students’ performance and stochastic modeling was given.

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Forms of nitrogen in waterlogged soils and their contribution to yield and nitrogen uptake by rice

Cited by 2 publications

References 2 publications

Chemical Properties of Soil under Different Redox Potentials

Chemical Properties of Soil under Different Redox Potentials

Effects of Road Infrastructure on Plantain Production among Farmers in Ekiti Southwest Local Government Area of Ekiti State, Nigeria

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