Soil test calibration for upland rice in south western Nigeria

Agboola, A. A.; Ayodele, O. J.

doi:10.1007/bf01050667

Cited by 8 publications

(11 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pH of the soils showed a decrease with depth with the exception of Aghalokpe and Sapele. At the two locations, Abraka (4.72) (rain forest) pH values were low when compared to the suggested pH level of 6-6.5 [11] for the production of most crops.…”

Section: Resultsmentioning

confidence: 61%

“…In the surface soils, it was lowest in Mosogar, followed by Abraka and Aghalokpe while it was highest in Sapele. In the subsurface, the value was highest in the soils from Sapele, based on a critical value of 0.24cmol/kg [14], surface soils obtained from Sapele were sufficient in exchangeable potassium while the other locations were deficient. Rain forest locations were deficient in exchangeable potassium.…”

Section: Resultsmentioning

confidence: 92%

“…Thus indicating lower magnesium at the surface in comparison to the subsurface. Based on the critical level of 1.9cmol/kg [14], all the locations had moderate exchangeable magnesium content.…”

Section: Resultsmentioning

confidence: 99%

“…The nutrient status of the soils was generally low with most of the nutrients having concentrations below the critical limits. Organic carbon content was sufficient at all locations according to the critical value of 1.0% recommended by Agboola & Ayodele [14]. Total N, available P and exchangeable K were marginal at all locations based on the recommendation by FDALR [12].…”

Section: Discussionmentioning

confidence: 99%

“…Iron content ranged from 82.3mg/kg in Aghalokpe to 238mg/kg in Sapele at the surface soils and from 59.7mg/kg in Aghalopke to 208mg/kg in Mosogar at the sub-surface. The critical value of iron and zinc have been given as 3-4.5mg/kg [11] and 5-9mg/kg [15], respectively. In considering the level above, the soil could be considered to be high in Fe and Zn contents.…”

Section: Soil Micronutrientsmentioning

confidence: 99%

See 4 more Smart Citations

Analysis of Physical and Chemical Properties of Some Selected Soils of Rain Forest Zones of Delta State, Nigeria

Umeri¹

2017

ARTOAJ

View full text Add to dashboard Cite

This study was conducted to evaluate the physical and chemical properties of some selected soils of rain forest zones in Delta State; Latitude 50 and 60 and 30' North and longitude 50 and 60, 45' east. Hence, representative soil samples were obtained from four locations viz: Abraka, Sapele, Mosogar, Aghalokpe (Rainforest zone) at 0-15cm and 15 -30cm depths. These were analyzed for their physical and chemical properties. The soils studied were mainly sand and loamy sand, with sandy texture predominating. The soils had a pH range of 4.72 to 6.52 at the surface, and were marginal inorganic carbon, total nitrogen, exchangeable Ca, Mg, and ECEC. Zinc, Fe, Cu and Mn contents were found to be adequate based on established critical levels for the various nutrients. Potassium levels were found to be deficient in the soils.

show abstract

Section: Resultsmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Soil Micronutrientsmentioning

confidence: 99%

See 3 more Smart Citations

Analysis of Physical and Chemical Properties of Some Selected Soils of Rain Forest Zones of Delta State, Nigeria

Umeri¹

2017

ARTOAJ

View full text Add to dashboard Cite

show abstract

Chemical Properties of Forest Soils

Osman¹

2013

Forest Soils

View full text Add to dashboard Cite

Options to reduce ranges in critical soil nutrient levels used in fertilizer recommendations by accounting for site conditions and methodology: A review

Siatwiinda,

Ros,

Yerokun

et al. 2024

Agron. Sustain. Dev.

View full text Add to dashboard Cite

Fertilizer recommendations (FR) to improve yields and increase profitability are based on relationships between crop yields and soil nutrient levels measured via soil extraction methods. Within these FR, critical soil nutrient (CSN) levels are used to distinguish nutrient deficient from non-deficient soils. The variation in CSN levels is large, implying a risk of over- or under-fertilization. Here, we review and assess the factors influencing the derivation of CSN levels in order to increase both their reliability and applicability within FR systems. The evaluated factors included site conditions, i.e., crop type and location as a surrogate for climate and soil properties, and methodological factors, i.e., the experimental approach (field or pot experiments), and statistical methods and cut-off point. Results showed that the range of values used to define the medium soil fertility classes coincided with the range of CSN levels derived from experimental data. We show that harmonizing methodological aspects can substantially reduce the uncertainty in the CSN levels (> 50%), implying a substantial enhancement of the reliability of FR systems. Inclusion of site conditions might further improve the reliability. To enable reduction in CSN levels requires well-documented field experiments and standardization of data collection and analysis. We foresee the potential for generic FR systems that make use of reliable data, more process-based interpretation of nutrient pools and accounting for the interactions among nutrients.

show abstract

Soil test calibration for upland rice in south western Nigeria

Cited by 8 publications

References 4 publications

Analysis of Physical and Chemical Properties of Some Selected Soils of Rain Forest Zones of Delta State, Nigeria

Analysis of Physical and Chemical Properties of Some Selected Soils of Rain Forest Zones of Delta State, Nigeria

Chemical Properties of Forest Soils

Options to reduce ranges in critical soil nutrient levels used in fertilizer recommendations by accounting for site conditions and methodology: A review

Contact Info

Product

Resources

About