Effect of Application Rate of Urea on the Growth, Bulb Yield and Quality of Onion (Allium Cepa L.) Grown under Semiarid Conditions of North Jordan

Al-Tabbal, Jalal A.; Angor, Malak; Ajo, Radwan; Al-Fraihat, Ahmad H.

doi:10.12816/0039718

Cited by 2 publications

(4 citation statements)

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“…Control soil is classified as silty clay (54:43%) with sand content of 3%. pH of the control soil was 7.8, and organic matter N, K, P, EC, and C/N were 0.74%, 0.05%, 420 mg/kg, 10.2 mg/kg, 0.35 dS/ ml, and 12.5 respectively (Al-Tabbal et al 2017). The two sets of barrels were irrigated with four levels of water (W1, W2, W3, and W4) which corresponded to 75%, 65%, 55%, and 45% of the field capacity.…”

Section: Methodsmentioning

confidence: 95%

Natural volcanic tuff as a soil mulching: effect on plant growth and soil chemistry under water stress

et al. 2019

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Efficient water management in agricultural sector necessitates the manipulation of all possible options for water supply and demand management methods. The purpose of this study was to determine the usefulness of using natural volcanic tuff as a soil mulching on plant and soil properties under different water levels. The experiments were performed using 1-year-old olive transplants planted in barrels filled with silty clay soil. Half of the barrels were covered with a coarse volcanic tuff, while the other samples were remained without covering and considered as control. The two sets of barrels were irrigated with four levels of water which correspond to 75%, 65%, 55%, and 45% of the field capacity. The treatments were arranged in a randomized complete block design with three replications. Results revealed that plant height, number of branches, trunk diameter, shoots length, shoot diameter, number of leaves, and plant weight for soil covered with volcanic tuff were significantly greater than control plants after the fifth growing season. The leaf water potential and relative water content of plants grown in mulched soil were significantly greater than those of control. An increase in nutrient contents of soil and plant tissues was found as a result of soil amendment with volcanic tuff. In summary, a positive influence of volcanic tuff additions on olive growth, leaves water status, and soil nutrient levels was determined.

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Section: Methodsmentioning

confidence: 95%

Natural volcanic tuff as a soil mulching: effect on plant growth and soil chemistry under water stress

et al. 2019

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“…However, onion growth is stimulated by N fertilization up to a specific limit, beyond which no benefit is observed for the crop [65,84,85]. Among the studies regarding onion N fertilization, Jilani et al [86] observed the highest onion yield with 200 kg N ha −1 , while other studies [65,68,[87][88][89][90] reported a range between 100 and 180 kg N ha −1 to achieve the best yield performance. According to several authors, the increment of yield related to N fertilization augments is attributable to an increased plant height, leaf area, bulk weight, and diameter [65,89,90].…”

Section: Ec [µS CMmentioning

confidence: 99%

“…Among the studies regarding onion N fertilization, Jilani et al [86] observed the highest onion yield with 200 kg N ha −1 , while other studies [65,68,[87][88][89][90] reported a range between 100 and 180 kg N ha −1 to achieve the best yield performance. According to several authors, the increment of yield related to N fertilization augments is attributable to an increased plant height, leaf area, bulk weight, and diameter [65,89,90]. Moreover, it was also reported that optimal N fertilization could increase vitamin C concentration in bulbs [90].…”

Section: Ec [µS CMmentioning

confidence: 99%

“…According to several authors, the increment of yield related to N fertilization augments is attributable to an increased plant height, leaf area, bulk weight, and diameter [65,89,90]. Moreover, it was also reported that optimal N fertilization could increase vitamin C concentration in bulbs [90]. Furthermore, it was observed that higher than optimal N fertilizer doses reduce the crop productivity level due to the appearance of phytotoxicity phenomena on plants [91,92] and plant susceptibility to diseases [93,94], also decreasing the commercial production [69,95].…”

Section: Ec [µS CMmentioning

confidence: 99%

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Monitoring Onion Crop “Cipolla Rossa di Tropea Calabria IGP” Growth and Yield Response to Varying Nitrogen Fertilizer Application Rates Using UAV Imagery

Messina

Praticò

Badagliacca

et al. 2021

Drones

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Remote sensing (RS) platforms such as unmanned aerial vehicles (UAVs) represent an essential source of information in precision agriculture (PA) as they are able to provide images on a daily basis and at a very high resolution. In this framework, this study aims to identify the optimal level of nitrogen (N)-based nutrients for improved productivity in an onion field of “Cipolla Rossa di Tropea” (Tropea red onion). Following an experiment that involved the arrangement of nine plots in the onion field in a randomized complete block design (RCBD), with three replications, three different levels of N fertilization were compared: N150 (150 kg N ha−1), N180 (180 kg N ha−1), and e N210 (210 kg N ha−1). The crop cycle was monitored using multispectral (MS) UAV imagery, producing vigor maps and taking into account the yield of data. The soil-adjusted vegetation index (SAVI) was used to monitor the vigor of the crop. In addition, the coverage’s class onion was spatially identified using geographical object-based image classification (GEOBIA), observing differences in SAVI values obtained in plots subjected to differentiated N fertilizer treatment. The information retrieved from the analysis of soil properties (electrical conductivity, ammonium and nitrate nitrogen), yield performance and mean SAVI index data from each field plot showed significant relationships between the different indicators investigated. A higher onion yield was evident in plot N180, in which SAVI values were higher based on the production data.

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Effect of Application Rate of Urea on the Growth, Bulb Yield and Quality of Onion (Allium Cepa L.) Grown under Semiarid Conditions of North Jordan

Cited by 2 publications

References 0 publications

Natural volcanic tuff as a soil mulching: effect on plant growth and soil chemistry under water stress

Natural volcanic tuff as a soil mulching: effect on plant growth and soil chemistry under water stress

Monitoring Onion Crop “Cipolla Rossa di Tropea Calabria IGP” Growth and Yield Response to Varying Nitrogen Fertilizer Application Rates Using UAV Imagery

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