Economic Optimization of Nutrient Application to Coffee in Northern Tanzania Using SAFERNAC

Maro, Godsteven

doi:10.9734/ijpss/2014/8361

Cited by 4 publications

(6 citation statements)

References 8 publications

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“…Generally, the net returns to N fertilizer use decreased as the N fertilizer application rate exceeded the EOR N . The results obtained from this study are similar to a report by Maro et al ( 2014 ) in Northern Tanzania who established that net return and value cost ratio decrease as nutrient application rates get further away from the optimum.…”

Section: Discussionsupporting

confidence: 91%

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: Discussionsupporting

confidence: 91%

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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“…Fertilizer application (NPK) at 100 kg ha −1 during growing season appears to be important at these slopes with shallow clay-loam soil prone to nutrient depletion by torrents during rainy season (Masrahi, 2012). Fertilizer application was recommended for coffee production (Jaramillo-Botero et al, 2010, Chemora, 2014, Maro et al, 2014, Melke and Ittana, 2015, Temesgen and Tufa, 2017). Reported variable farm area of 300–1500 m 2 is due to rugged terrain of narrow terraced slopes at this mountainous region.…”

Section: Discussionmentioning

confidence: 99%

Coffee production in southern Saudi Arabian highlands: Current status and water conservation

Sayed

Masrahi

Remesh

et al. 2019

Saudi Journal of Biological Sciences

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Work aimed at assessing status and introducing water conservation regimes for coffee production in southern Saudi Arabian highlands. Data on farm locations, altitudes, areas, practices, irrigation, tree density, and annual coffee production were analyzed. Field experiment using chlorophyll fluorescence and different irrigation regimes was conducted to examine effects of reducing irrigation frequency on photosynthesis. Results indicated that Coffea arabica L. is commonly grown at altitudes of 1300–1400 m. Plants grown at 4–6 Trees m−2 using 100 kg ha−1 mineral fertilizer produce an average of 3 t ha−1. High frequency 2-day-intervals irrigation regime practiced by farmers during the dry season presents ecological challenge to limited local artesian water resources. Changes in chlorophyll fluorescence under 14-day-intervals irrigation regime initiated water stress that markedly inhibited Photosystem II efficiency and quantum yield and increased non-photochemical energy dissipation. Applying a 7-day-intervals irrigation regime induced less inhibitory effects on Photosystem II. Results also indicated that shifting from 2-day-intervals irrigation regime to 7-day-intervals regime improves coffee agroecology and directs coffee production towards sustainability.

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“…This findings support (Diro & Erko, 2019;Wu, 2005) who reported that, farmers who adopted improved varieties gain higher yield than those with traditional varieties. The study conducted by (Maro et al, 2014;TCB, 2012a) recoded the average yield of 555 kg/ha, maximum yield of 1554 kg/ha and minimum yield 51 kg/ha in Mbinga district and average yield of 422 kg/ha, maximum yield of 1745 kg/ha and minimum yield 253 kg/ha in Mbozi district. 0.000…”

Section: Coffee Yield Estimationmentioning

confidence: 99%

“…The findings imply that, smallholder farmers do not apply sufficient amount of fertilizer or either they don't apply at all hence cause the increased in yield gap. According to (Maro, 2014 andTaCRI, 2011), application of recommended fertilizer would contribute to increase coffee yield hence reduce the yield gap. The reason for low fertilizer application among smallholder farmers is due to high price of fertilizer.…”

Section: The Factors Causing Coffee Yield Gap Among Smallholder Farmersmentioning

confidence: 99%

“…The reason for low fertilizer application among smallholder farmers is due to high price of fertilizer. The possible alternative that farmer can afford and adopt is integrated soil fertility management (ISFM) proposed by (Maro, 2014 andTaCRI, 2011). Meanwhile the government should take the issue of input availability to farmers for reasonable price a s important agenda and put strategies to ensure that resource poor smallholder farmers who are productive get adequate amounts of quality inputs at the right time and reasonable price to obtain high yields.…”

Section: The Factors Causing Coffee Yield Gap Among Smallholder Farmersmentioning

confidence: 99%

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Assessment of Factors Causing Coffee Yield Gap Among Smallholder Farmers in Mbinga and Mbozi Districts

Kiwelu¹,

Philip

Mpenda

2021

Preprint

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This study assesses the factors causing coffee yield gap among smallholder in the study area. The aim of this study is to increase coffee productivity from the current level. The primary data were collected from 218 adopters and 102 non-adopters of improved coffee varieties using a structured questionnaire. The descriptive statistics was used to assess yield gap and linear regression model was used to determine factors causing yield gap among smallholder farmers in the study area. The findings showed that the yield potential (3000 kg/ha and 1000 kg/ha) for improved and traditional coffee varieties respectively has not yet been realized by farmers and there is a large gap between the average coffee yield (1141 kg/ha and 384 kg/ha) gained by smallholder farmers growing improved coffee varieties and farmer growing traditional coffee varieties respectively. The yield gap from smallholder farmers with improved coffee varieties was 2000 kg/ha and 646 kg/ha from traditional coffee varieties. The main factors causing coffee yield gap were lack of access to extension services (p < 0.000), plant population (0.007), low use of fertilizer (p < 0.002), coffee diseases (p < 0.008). To minimize coffee yield gap in Tanzania promotion of the use of improved coffee varieties, fertilizer and agro-inputs is important.

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Economic Optimization of Nutrient Application to Coffee in Northern Tanzania Using SAFERNAC

Cited by 4 publications

References 8 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

Coffee production in southern Saudi Arabian highlands: Current status and water conservation

Assessment of Factors Causing Coffee Yield Gap Among Smallholder Farmers in Mbinga and Mbozi Districts

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