Growth and yield response of sweet potato to different tillage methods and phosphorus fertilizer rates in Ghana

Dumbuya, Gibrilla; Sarkodie-Addo, J.; Daramy, Moses Ahmed; Jalloh, Momodu

doi:10.18006/2016.4(5).475.483

Cited by 19 publications

(21 citation statements)

References 9 publications

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“…The average yield increment in CA (15.9 t ha −1 ) for sweet potato in Yemu was statistically significant compared to CT (10.1 t ha −1 ). The result is consistent with Dumbuya et al [66] sweet potato yield findings for the tilled system (9.5 to 15.8 t ha −1 ) in southern Ghana. On the other hand, garlic and onion yields in Dangishita and Robit sites were generally small, however, the yield increment in CA was statistically significant (α = 0.05).…”

Section: Effects Of Conservation Agriculture On Irrigation Water Prodsupporting

confidence: 92%

Experimental Evaluation of Conservation Agriculture with Drip Irrigation for Water Productivity in Sub-Saharan Africa

Assefa

Jha

Reyes

et al. 2019

Water

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A field-scale experimental study was conducted in Sub-Saharan Africa (Ethiopia and Ghana) to examine the effects of conservation agriculture (CA) with drip irrigation system on water productivity in vegetable home gardens. CA here refers to minimum soil disturbance (no-till), year-round organic mulch cover, and diverse cropping in the rotation. A total of 28 farmers (13 farmers in Ethiopia and 15 farmers in Ghana) participated in this experiment. The experimental setup was a paired 't' design on a 100 m 2 plot; where half of the plot was assigned to CA and the other half to conventional tillage (CT), both under drip irrigation system. Irrigation water use and crop yield were monitored for three seasons in Ethiopia and one season in Ghana for vegetable production including garlic, onion, cabbage, tomato, and sweet potato. Irrigation water use was substantially lower under CA, 18% to 45.6%, with a substantial increase in crop yields, 9% to about two-fold, when compared with CT practice for the various vegetables. Crop yields and irrigation water uses were combined into one metric, water productivity, for the statistical analysis on the effect of CA with drip irrigation system. One-tailed paired 't' test statistical analysis was used to examine if the mean water productivity in CA is higher than that of CT. Water productivity was found to be significantly improved (α = 0.05) under the CA practice; 100%, 120%, 222%, 33%, and 49% for garlic, onion, tomato, cabbage, and sweet potato respectively. This could be due to the improvement of soil quality and structure due to CA practice, adding nutrients to the soil and sticking soil particles together (increase soil aggregates). Irrigation water productivity for tomato under CA (5.17 kg m −3 in CA as compared to 1.61 kg m −3 in CT) is found to be highest when compared to water productivity for the other vegetables. The mulch cover provided protection for the tomatoes from direct contact with the soil and minimized the chances of soil-borne diseases. Adapting to CA practices with drip irrigation in vegetable home gardens is, therefore, a feasible strategy to improve water use efficiency, and to intensify crop yield, which directly contributes towards the sustainability of livelihoods of smallholder farmers in the region.

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Section: Effects Of Conservation Agriculture On Irrigation Water Prodsupporting

confidence: 92%

Experimental Evaluation of Conservation Agriculture with Drip Irrigation for Water Productivity in Sub-Saharan Africa

Assefa

Jha

Reyes

et al. 2019

Water

View full text Add to dashboard Cite

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“…Planting pattern 3 had the highest number of branches per plant at day 75 (4.7 branches), followed by pattern 2 (3.4). Dumbuya et al (2016) reported that sweet potato had 4.20 and 5.97 branches per plant at 30 and 60 days after planting. Ogbe et al 2012reported branch number per plant of 11 cultivars ranged from 3.83 to 4.83 which is similar to our results.…”

Section: Rainy Seasonmentioning

confidence: 99%

“…Pattern 5 gave the highest number of tubers /plant and number of tubers/ha (7.7 and 408.9x10 3 tubers, respectively) ( Table 1). Dumbuya et al (2016) studied the response of phosphorus rates on growth and yield of sweet potato cv. Okumkom and their results showed that the number of marketable roots per plant ranged from 3.20 to 4.63 which is much lower than our study.…”

Section: Rainy Seasonmentioning

confidence: 99%

Effect of planting pattern and season on some agronomic performances and yield of sweet potato cv. Japanese Orange

Bunphan

Anderson

2019

Aust J Crop Sci

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Sweet potato (Ipomoea batatas (L.) is one of the most important root crops in the world. It is primarily grown as a second crop during the dry season in Thailand. Several cultivars are produced with some being imported from Japan, especially cv. Japanese Orange, Yellow and Purple which are popular because they have high value and are rich in phytochemicals. Thai farmers use only one planting pattern for production although there are five recommended patterns available. The objectives of this study were to investigate the effect of different planting patterns on yield, agronomic traits, and determine associations among agronomic traits of sweet potato cv. Japanese Orange. The experiments were conducted during the rainy and dry seasons of 2017. An RCBD with 5 planting patterns and 3 replications were used. Tuber yield, no. of tuber/plant, no. of tuber/ha, no. branch/plant, tuber diameter and tuber fresh weight were measured. The results revealed that during the rainy season, pattern 5 (three vines per hole) had highest tuber yield (11.2 ton/ha), no. of tubers/plant (7.7) and number of tubers/ha (408.9×103) whereas pattern 3 (one vine) had highest no of branches/plant (4.7) and tuber diameter (36.9 mm). In the dry season, patterns 1, 5 and 3 had the highest yields (7.13, 6.71 and 6.48 ton/ha, respectively) pattern 1 had significantly higher tuber fresh weight (84.17 g) than the other four patterns. Pattern 5 had the highest number of tubers/plant and number of tubers/ha during the dry season. We found positive correlations between tuber yield and number of tuber per plant, number of tuber per ha, vine length, vine girth, number of nodes per plant at 60 and 75 DAP.

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“…A combination between superphosphate at the recommended P level and VAM-fungi inoculation treatment was found to significant increase sweet potato root production and quality [9]. In investigating the effect of tillage methods and phosphorus fertilizer on growth and yield response of sweet potato, results showed that plant growth was not significantly affected by tillage but highest growth and yield was observed from phosphorus treatment [10]. Poultry manure and NPK fertilizers had a significant effect on the yield of sweet potatoes [11].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Yields and Yield Components of Sweet Potatoes (Ipomea batatas (L.) Lam) Using Organic Manure and Phosphate Fertilizer

Mwangi

Miano

Macharia

2019

AJPAS

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Sweet potato production has been faced with various constraints including small land sizes and inappropriate agronomic practices, especially on management of soil fertility. Many studies that have been carried out on the effects of application of farmyard manure on sweet potatoes yields have just been used to get the best treatment within the range of treatments used. However, the designs used in data analysis are not appropriate for optimisation process. Therefore, there is need to use an appropriate design that will optimise the yields within the limited available resources for sustainable production of sweet potatoes. The objective of this study was to determine the optimum operating settings and to optimise the yields and the yield components in sweet potatoes. The study was conducted at Chuka University horticultural demonstration farm. The experiment was laid out in a Randomised Complete Block Design and replicated three times. The treatments included cattle manure and poultry manure (0, 5, 10, 15 and 20 tons per hectare) and inorganic phosphate fertilizer (0, 20, 40, 60 and 80 tons of P2O5 per hectare). Data was collected on number of tubers, tuber diameter, length and weight of tubers per plot. Central Composite Design (CCD) was applied in the optimization process. Data obtained was analysed using R statistical software and the second order mathematical model which described the response as a function of input variables, was generated. The study found that the optimal levels of inorganic phosphate, poultry manure and cattle manure that led to maximum yield were; 2.895 tons/ ha, 7.5 tons/ ha and 14.88 tons/ha, respectively. The study demonstrated that CCD can serve as an inexpensive tool in optimization of the sweet potato yield. The study was also useful to the farmers in the area of study since they can get information on the optimal levels of application organic manure and phosphate fertilizer that would lead to maximum yields.

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Growth and yield response of sweet potato to different tillage methods and phosphorus fertilizer rates in Ghana

Cited by 19 publications

References 9 publications

Experimental Evaluation of Conservation Agriculture with Drip Irrigation for Water Productivity in Sub-Saharan Africa

Experimental Evaluation of Conservation Agriculture with Drip Irrigation for Water Productivity in Sub-Saharan Africa

Effect of planting pattern and season on some agronomic performances and yield of sweet potato cv. Japanese Orange

Optimization of Yields and Yield Components of Sweet Potatoes (Ipomea batatas (L.) Lam) Using Organic Manure and Phosphate Fertilizer

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