Optimizing fertilizer Use within the Context of Integrated Soil Fertility Management in Ghana

Tetteh, F. M.; Quansah, Gabriel W.; Frempong, S. O.; Nurudeen, Abdul Rahman; Atakora, Williams K.; Opoku, G.

doi:10.1079/9781786392046.0067

Cited by 12 publications

(22 citation statements)

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“…The results of the EOR N obtained in this study are more economical than the ones obtained by other researchers in sub-Saharan Africa, where the EOR N was 10-100% greater than the recommended rate of N for maize (Cyamweshi et al 2017;Kibunja et al 2017). The EOR N recorded by Tetteh et al (2017) Nitrogen application rate (kg ha -1 ) CP=1 CP=1.5 CP=2 CP=2.5 Fig. 3 Net returns of maize to fertilizer N application to at varying N rates and fertilizer cost to grain price ratios (CP).…”

Section: Economically Optimal Nutrient Rates For N Over a Varying Rancontrasting

confidence: 47%

“…Fertilizer use in Ghana is low and the recommended rates for application are usually blanket (Tetteh et al 2017). Moreover, climate change has altered the soil biophysical environment and Electronic supplementary material The online version of this article (https://doi.org/10.1007/s42729-020-00240-y) contains supplementary material, which is available to authorized users.…”

Section: Introductionmentioning

confidence: 99%

“…Maize is the most important cereal crop in Ghana with an estimated annual production of 750,000 ha (Tetteh et al 2017 ). The crop is predominantly cultivated by smallholder resource-constrained farmers, mostly under rain-fed conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Fertilizer use in Ghana is low and the recommended rates for application are usually blanket (Tetteh et al 2017 ). Moreover, climate change has altered the soil biophysical environment and impoverished the soils to the extent that the efficiency of blanket fertilizer application has become questionable (Okebalama 2014 ).…”

Section: Introductionmentioning

confidence: 99%

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Economically Optimal Rate for Nutrient Application to Maize in the Semi-deciduous Forest Zone of Ghana

Essel

Abaidoo

Opoku

et al. 2020

J Soil Sci Plant Nutr

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Low inherent nitrogen (N), phosphorus (P), and potassium (K) contents of smallholder farms limit maize grain yield. Maize grain yield response to N, P, and K mineral fertilizer application and economically optimal rates for nitrogen (EOR N), phosphorus (EOR P), and potassium (EOR K) were evaluated on a Ferric Acrisol within the semi-deciduous forest zone of Ghana. The nutrient rates evaluated were N (0, 30, 60, 90, and 120 kg N ha −1), P (0, 30, 60, and 90 kg ha −1 P 2 O 5), and K (0, 30, 60 and 90 kg ha −1 K 2 O). The treatments were arranged in a randomized complete block with three replications using an incomplete factorial design. Nutrient responses were determined using asymptotic quadratic-plus plateau functions. The best nitrogen rate for all P and K levels was 60 kg ha −1 , which gave grain yield of 5 t ha −1. Nitrogen uptake, N agronomic and N recovery efficiencies peaked at 60 kg N ha −1 while N partial factor productivity declined with increasing N application rate. Cost to grain price ratios (CP) were 1.29, 1.65, and 1.65 for N, P, and K, respectively. The EOR N was 61 kg ha −1 , 32% less than the recommended 90 kg N ha −1 for maize production in the semi-deciduous forest zone of Ghana. Nitrogen application had the lowest CP ratio, making its application economically profitable than P and K. The findings suggest that the application of N at 61 kg N ha −1 to maize is economically profitable than at higher application rates. However, further studies should be conducted on farmers' fields to validate the results obtained.

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Section: Economically Optimal Nutrient Rates For N Over a Varying Rancontrasting

confidence: 47%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Fertilizer use in Ghana is low and the recommended rates for application are usually blanket (Tetteh et al 2017 ). Moreover, climate change has altered the soil biophysical environment and impoverished the soils to the extent that the efficiency of blanket fertilizer application has become questionable (Okebalama 2014 ).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Economically Optimal Rate for Nutrient Application to Maize in the Semi-deciduous Forest Zone of Ghana

Essel

Abaidoo

Opoku

et al. 2020

J Soil Sci Plant Nutr

View full text Add to dashboard Cite

show abstract

“…Both AE and VCR of N decreased with increased N rate in cases of asymptotic responses as was expected. The VCR for N at all sites, P at the Tanzania sites, and P and K at Akuma were >2 and high enough that fertilizer N applied to cassava was likely to be highly competitive with other fertilizer use applications for other crops in terms of profit potential (Shekiffu, 2011;Tetteh et al, 2017;Kibunja et al, 2017;Senkoro et al, 2017).…”

Section: N Ratementioning

confidence: 99%

Cassava Yield and Economic Response to Fertilizer in Tanzania, Kenya and Ghana

Senkoro¹,

Tetteh²,

Kibunja

et al. 2018

Agronomy Journal

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C assava (Manihot esculenta Crantz) is an important crop of smallholder farmers in Tanzania, Kenya and Ghana (Harvest Choice, 2011). In Ghana, cassava is second to maize in terms of production area and an important cash crop (MOFA, 2010; FAO, 2015). In Tanzania and in Western and Coastal Kenya, cassava is second to maize in importance as a food crop (Mwango'mbe et al., 2013). However, mean cassava fresh storage root yield was estimated to be 13.5, 6.2 and 14.4 Mg ha-1 for Kenya, Tanzania and Ghana, respectively (FAOSTAT, 2017) while cassava yield has reached 80 Mg ha-1 (FAO, 2013). Pests and diseases, the use of poor cultural practices, and low soil fertility status are among causal factors for low cassava yields (Harvest Choice, 2011; Ezui et al., 2016). Several studies have shown that the soil nutrient balance is negative due to nutrient removal at harvest, minimal or no use of fertilizers, and soil erosion (Asadu and Nweke, 1999; Shekiffu, 2011; Fermont 2009). Few soil fertility studies have been conducted in cassava production in Tanzania, Kenya and Ghana and very few farmers apply fertilizer to cassava (

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Residual Bradyrhizobium inoculation effects on soybean performance and selected soil health parameters

et al. 2022

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The persistence of inoculants from year to year in soybean [Glycine max (L.) Merr.] cultivation and the residual benefits in soybean production are pertinent to adopting such practices in sub-Saharan Africa countries such as Ghana. A study was conducted to determine the residual effect of commercial rhizobium inoculants on soybean and selected soil health parameters after three cropping seasons. The experimental design was a split-plot. The main plot consisted of three soybean cultivars (Jenguma, Afayak, and Songda), and the subplot comprised of three peat-based commercial bradyrhizobium inoculants (Biofix, Legumefix, and NoduMax) and an uninoculated control. Assessments were made on nodulation, shoot dry matter (DM), grain yield, grain total N uptake, permanganate-oxidizable carbon (POXC), soil pH, and potentially mineralizable C. Among the soybean cultivars, Afayak produced greater nodule mass on the lateral root and the whole root system compared with the other cultivars. Jenguma and Afayak yielded greater shoot DM relative to Songda. Regarding the inoculants, Biofix increased nodule mass on the lateral root and the whole root system compared with the control. Biofix and NoduMax produced superior grain yield relative to the control. Biofix also produced greater grain yield than Legumefix. A superior pod harvest index and an improved grain total N uptake were produced by Biofix compared with Legumefix and the control. Commercial inoculants enhanced POXC availability at harvest, whereas potentially mineralizable C declined with inoculation treatments.Commercial inoculants (Biofix and NoduMax) enhanced nodulation, grain yield, and selected soil health indicators 3 yr after inoculation.

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Optimizing fertilizer Use within the Context of Integrated Soil Fertility Management in Ghana

Cited by 12 publications

References 0 publications

Economically Optimal Rate for Nutrient Application to Maize in the Semi-deciduous Forest Zone of Ghana

Economically Optimal Rate for Nutrient Application to Maize in the Semi-deciduous Forest Zone of Ghana

Cassava Yield and Economic Response to Fertilizer in Tanzania, Kenya and Ghana

Residual Bradyrhizobium inoculation effects on soybean performance and selected soil health parameters

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