Determining optimum rates of mineral fertilizers for economic rice grain yields under the “Sawah” system in Ghana

Moro, Buri Mohammed; Nuhu, Issaka Roland; Wakatsuki, Toshiyuki

doi:10.4314/wajae.v12i1.45770

Cited by 14 publications

(11 citation statements)

References 7 publications

(1 reference statement)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[14] Support these results by reporting that exclusion of N resulted on 1.29 t/ha compared to 6.84 t/ha of rice due to application of combined NPK. [14] Also reported 26 kg P/ha as optimum rate for the soil with P less than 2 mg/kg. A review by [15] gave a blanket recommendation of 10 kg P/ha as optimum rate for paddy soils of Kilombero valley.…”

Section: Mkula Sitesupporting

confidence: 78%

“…A low grain yield when N fertilizer was excluded is due to low levels of N in soils (Table 1). [14] Reported an increase in GY when 90 kg N/ha was applied in rice production lowlands of Ghana. [14] Support these results by reporting that exclusion of N resulted on 1.29 t/ha compared to 6.84 t/ha of rice due to application of combined NPK.…”

Section: Mkula Sitementioning

confidence: 99%

“…[14] Reported an increase in GY when 90 kg N/ha was applied in rice production lowlands of Ghana. [14] Support these results by reporting that exclusion of N resulted on 1.29 t/ha compared to 6.84 t/ha of rice due to application of combined NPK. [14] Also reported 26 kg P/ha as optimum rate for the soil with P less than 2 mg/kg.…”

Section: Mkula Sitementioning

confidence: 99%

“…[14] Reported low yields of 1.2, 2.03 and 3.09 t/ha when nutrients were applied by excluding N, P and K in plots, respectively, while a balanced application of 90-26-50 N-P-K gave the yield of 6.84 t/ha. The increased yield due to N, P, and K fertilization demonstrates the importance of optimum rates and balanced nutrition in rice production.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Optimum Levels of Phosphorus and Potassium for Rice in Lowland Areas of Kilombero District, Tanzania

Kalala¹

2017

AFF

View full text Add to dashboard Cite

Abstract:The optimal recommended rates of phosphorus (P) and potassium (K) in the Kilombero valley, Tanzania are outdated. The Objective of the study was to establish optimum rates of P and K for improved rice cultivation in rice fields of Kilombero valley. Two on-farm experiments were carried out in two seasons of January to May 2014 and 2015 at Mkula, Mbasa and Kisawasawa sites in Kilombero district, Tanzania. In the first experiment the treatments were a control for P; adequate levels of N and K plus two rates of phosphorus 10 and 20 kg P /ha. In the second experiment the treatments were a control for K; and two rates of K of either 50 or 100 kg/ha. These three treatments each received adequate levels of N, P and Zn. An absolute control and a control for N treatments were included in both of the experiments. The test crop was rice variety SARO-5. Phosphorus application significantly increased grain yield (GY) by 3.26 and 2.01 t/ha at Mbasa and Mkula, respectively. Also P application increased shoot P concentration from a low level (0.12%) to the adequate range (0.19 -0.24%) at the two sites. Potassium application increased significantly GY by 2.76 and 1.93 t/ha at Mbasa and Mkula, respectively. Also K application increased shoot K concentration from a low range (1.14 -1.34%) to the adequate range (2.63 -2.99%) at the two sites. An application of P and K affected neither shoot K nor P concentrations nor GY at Kisawasawa site. It is recommended that 10 kg P/ha and 50 kg K/ha be used as optimum rate for rice production in P and K deficient soils of Kilombero valley.

show abstract

Section: Mkula Sitesupporting

confidence: 78%

Section: Mkula Sitementioning

confidence: 99%

Section: Mkula Sitementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimum Levels of Phosphorus and Potassium for Rice in Lowland Areas of Kilombero District, Tanzania

Kalala¹

2017

AFF

View full text Add to dashboard Cite

show abstract

“…Actual yield was adjusted downward by 10% to reflect the difference between the experimental yield and the yield farmers could expect from the same treatment. It was assumed that there was optimum plant population density, timely labor availability and better management (e.g., weed control, better security) under experimental conditions [19,20].…”

Section: Partial Budget Analysismentioning

confidence: 99%

Growth and Yield Response of Cowpea (Vigna unguiculata L. Walp.) to Integrated Use of Planting Pattern and Herbicide Mixtures in Wollo, Northern Ethiopia

Mekonnen¹,

JJ²

2016

Adv Crop Sci Tech

View full text Add to dashboard Cite

To assess the integrated effect of planting pattern and low dose herbicide mixtures on weeds and growth, yield attributes and yields of cowpea, and to determine the economic feasibility of different weed management practices in cowpea, a field experiment was conducted at Sirinka Agricultural Research Center experimental sites at Jari and Sirinka in Northern Ethiopia during the 2014 main cropping season. There were 16 treatments comprising the combinations of two planting patterns (60 cm × 10 cm, 45 cm × 15 cm) and eight weed management practices (s-metolachlor 2.0 kg ha -1 , s-metolachlor at 1.0 kg ha -1 +hand weeding and hoeing 35 weeks after crop emergence (WAE), pendimethalin at 1.0 kg ha -1 +hand weeding and hoeing 5 WAE, s-metolachlor at 1.0 kg ha -1 +pendimethalin at 1.0 kg ha -1 , s-metolachlor at 1.0 kg ha -1 +pendimethalin at 0.75 kg ha -1 , s-metolachlor at 0.75 kg ha -1 +pendimethalin at 1.0 kg ha -1 , hand weeding and hoeing 3 WAE and weedy check. The treatments were laid out in factorial combination in a randomized complete block design with three replications. The highest number of pods per plant, number of seeds per pod, and hundred seed weight were obtained from the combination of s-metolachlor at 1.0 kg ha -1 +hand weeding 5 WAE along with 60 cm × 10 cm at Sirinka. Higher (3092 kg ha -1 ) grain yield was recorded at Sirinka than at Jari (2714 kg ha -1 ). The highest (53460 ETB ha -1 ) gross benefit was obtained from s-metolachlor at 1.0 kg ha -1 +hand weeding and hoeing 5 WAE, followed by pendimethalin at 1.0 kg ha -1 +hand weeding and hoeing 5 WAE (46737 ETB ha -1 ). Therefore, managing the weeds with the application of 1.0 kg ha -1 of s-metolachlor+hand weeding and hoeing 5 WAE along with 60 cm × 10 cm proved to be the most feasible practice. Alternate herbicides for the control of X. strumarium infested fields in the study area needs to be explored.

show abstract

Increasing lowland rice yields of smallholder farmers through the adoption of good agricultural practices in the forest agro-ecological zone of Ghana

Ayamba,

Buri,

Sekyi-Annan

et al. 2023

Plant Production Science

View full text Add to dashboard Cite

Determining optimum rates of mineral fertilizers for economic rice grain yields under the “Sawah” system in Ghana

Cited by 14 publications

References 7 publications

Optimum Levels of Phosphorus and Potassium for Rice in Lowland Areas of Kilombero District, Tanzania

Optimum Levels of Phosphorus and Potassium for Rice in Lowland Areas of Kilombero District, Tanzania

Growth and Yield Response of Cowpea (Vigna unguiculata L. Walp.) to Integrated Use of Planting Pattern and Herbicide Mixtures in Wollo, Northern Ethiopia

Increasing lowland rice yields of smallholder farmers through the adoption of good agricultural practices in the forest agro-ecological zone of Ghana

Contact Info

Product

Resources

About