Effect of integrated use of inorganic fertilizer and organic manures on bacterial wilt incidence (BWI) and tuber yield in potato production systems on hill slopes of central Kenya

Linus, M. M. Muriithi; Irungu, J.

doi:10.1007/bf02919363

Cited by 15 publications

(10 citation statements)

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“…This is due to practical reasons as fertilizer or organic resources alone may not provide sufficient amounts or may be unsuitable for alleviating specific constraints to crop production (Sanchez and Jama, 2001). Especially, vermicompost with inorganic NP fertilizers is one of the promising techniques for improving soil fertility and increasing vegetables production (Kachapur et al, 2001;Linus and Irungu, 2004).…”

Section: Author(s) Agree That This Article Remain Permanently Open Acmentioning

confidence: 99%

Effect of inorganic NP fertilizers and vermicompost on growth, seed yield and yield components of onion (Allium cepa L.) at Maitsebri, northern Ethiopia

Asgele¹,

Woldetsadik²,

Gedamu³

2018

J. Hortic. For.

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The NP fertilizer or organic resources alone may not provide sufficient amounts or may be unsuitable for alleviating specific constraints to crop production. Therefore, a field experiment was conducted at ) was obtained from the plants grown at 75% of RDF with vermicompost at 2.5 t ha -1 which was about 263% higher than seed yield from unfertilized control plot. It can, thus, be concluded that the combined application of 75% of RDF with vermicompost at 2.5 t ha -1 can improve growth, seed yield and yield components of Bombay red onion variety in the study area.

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Section: Author(s) Agree That This Article Remain Permanently Open Acmentioning

confidence: 99%

Effect of inorganic NP fertilizers and vermicompost on growth, seed yield and yield components of onion (Allium cepa L.) at Maitsebri, northern Ethiopia

Asgele¹,

Woldetsadik²,

Gedamu³

2018

J. Hortic. For.

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“…The gap between the production potential and the current national production average could be attributed to many and complex biotic, abiotic, and human factors (Chanie, Teshome, Temesgen, & Berihun, ; Ghebreslassie, Githiri, Tadesse, & Kasili, ). Production constraints that have contributed to the limited production of potatoes in Ethiopia include soil fertility, lack of good quality planting materials, diseases, insect pests, and poor soil management practices (Fageria & Baligar, ), with low soil fertility is one of the critical factors limiting potato crop productivity (Linus & Irungu, ). The western lands of Ethiopia are acidic and receive an excess of rain.…”

Section: Introductionmentioning

confidence: 99%

Response of potato to nitrogen and phosphorus fertilizers at Assosa, western Ethiopia

Setu

Mitiku

2020

Agronomy Journal

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Low soil fertility is one of the critical factors limiting the productivity of potatoes (Solanum tuberosum L.) in western Ethiopia. The field experiment was conducted in the 2015 and 2016 cropping seasons to elucidate the response of potato yield, yield components, tuber quality to nitrogen and phosphorus fertilizer, and their economic benefit. The treatment comprised five levels of nitrogen (0, 50, 100, 150, and 200 kg N ha −1 ) and five levels of phosphorus (0, 50, 100, 150, and 200 kg P 2 O 5 ha −1 ). The experiment was laid out as a randomized complete block design in a factorial (5 × 5) arrangement and we replicated the treatments three times. The results revealed that the interaction of nitrogen and phosphorus did not affect growth, yield, and quality parameters of potato. However, nitrogen alone affected plant height, tuber number per plant, number of stems per hill, and marketable and total tuber yield, but not tuber quality parameters. The optimum yields of both marketable (25.5 Mg ha −1 ) and total (28.4 Mg ha −1 ) tuber yields were observed in the application of 150 kg N ha −1 . Phosphorus treatments had no response for most of the yield, yield components, or tuber quality parameters. Applications of 150 kg N ha −1 provided a maximum gross margin ($5138.68 or 141,773.55 Ethiopian Birr [ETB] ha −1 ) with a 79.4% gross profit margin and the highest benefit-cost ratio (4.86).

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“…This is particularly true to Eritrean case due to the wrong assumption that the soil is developed from K rich parent material and contains sufficient amount of K to support crop growth [7]. However, many recent research findings proved that the fertility levels of East African soil, including Eritrea, are low because of continuous farming and degradation without replenishment [8]. Thus, low soil fertility is negatively affecting potato production in Eastern Africa, requiring accelerated agricultural intensification to optimize potato production (the authors added).…”

Section: Introductionmentioning

confidence: 99%

Effect of Potassium Levels on Growth and Productivity of Potato Varieties

Zelelew¹,

Lal²,

Kidane³

et al. 2016

AJPS

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Potato is one of the priority vegetable crops in the highlands of Eritrea growing as a key component in the livelihood systems of farmers. Potato requires a variety of balanced plant mineral nutrients for growth and development without which yield and qualities of tubers are reduced. Potato growers in Eritrea commonly use Di-ammonium Phosphate, Urea and Farmyard manure while potassium fertilizers are overlooked assuming that the soil is developed from K rich parent material and contains sufficient amount of K to support crop growth. However this assumption is based on the result obtained forty-seven years ago. As a result the yield and quality of potato produced is very low as compared with international standards. Therefore the present experiment was conducted to assess the effect of potassium levels on growth and productivity of potato varieties at Hamelmalo Agricultural College, Eritrea. The experiment was conducted in factorial Randomized Complete Block Design with fifteen treatment combinations of three varieties (Ajiba, Zafira and Picasso) and five potassium levels (0, 75, 150, 225 and 300 kg K2O/ha) replicated thrice. The results of the study showed that both variety and potassium had significant effect on growth and yield parameters. Aerial stem number, leaf number per plant and plant height were increased with increasing K levels from 0 to 150 kg while number of days to maturity was increased in the range of 0 -300 kg K 2 O/ha. The result also indicated that variety Ajiba treated with 300 kg K 2 O/ha produced significantly highest tuber weight (1.14 kg) per plant and tuber yield of 49.38 t/ha. The economic analysis result revealed that maximum gross margin 13,665.816 USD/ha was obtained from the application of 300 kg K 2 O/ha. On the whole, it gives an impression that using potassium fertilizer according to soil requirements will have good influence on growth and tuber yield.

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Effect of integrated use of inorganic fertilizer and organic manures on bacterial wilt incidence (BWI) and tuber yield in potato production systems on hill slopes of central Kenya

Cited by 15 publications

References 4 publications

Effect of inorganic NP fertilizers and vermicompost on growth, seed yield and yield components of onion (Allium cepa L.) at Maitsebri, northern Ethiopia

Effect of inorganic NP fertilizers and vermicompost on growth, seed yield and yield components of onion (Allium cepa L.) at Maitsebri, northern Ethiopia

Response of potato to nitrogen and phosphorus fertilizers at Assosa, western Ethiopia

Effect of Potassium Levels on Growth and Productivity of Potato Varieties

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