Effect of method and scheduling of irrigation on water and nitrogen use efficiencies of Okra (Abelmoschus esculentus)

Home, Patrick G.; Panda, Rutuparna; Kar, S.

doi:10.1016/s0378-3774(01)00186-x

Cited by 37 publications

(16 citation statements)

References 6 publications

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“…Proper scheduling of sprinkler irrigation is critical for efficient water management in crop production, particularly under conditions of water scarcity (Pereira et al 2002). The use of soil water balance and meteorological methods for scheduling sprinkler irrigation has been studied for a variety of crops: winter wheat (Schneider and Howell 2001), dry bean (Heinemann et al 2000), okra (Home et al 2002), onion (Al-Jamal et al 2001), almond (Koumanov et al 1997), cotton (Singh and Singh 1996;Mateos et al 1997;Cetin and Bilgel 2002), alfalfa (Bai and Li 2003) and lettuce (Gallardo et al 1996). All these methods require expensive equipment, and highly skilled labor, and use complex methods of calculating crop water demand.…”

Section: Introductionmentioning

confidence: 99%

Sprinkler irrigation scheduling of winter wheat in the North China Plain using a 20 cm standard pan

Liu

Kang

2006

Irrig Sci

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Based on evaporation from a 20 cm diameter pan placed above the crop canopy, sprinkler irrigation scheduling of winter wheat was studied in the North China Plain (NCP) in the 2001-2004 winter wheat seasons. Results showed that pan evaporation (E pan,C ) was closely related to actual evapotranspiration (ET) measured using weighing lysimeters. The combined pan-crop coefficient (K c,pan ), the ratio of ET to E pan,C , was closely related to leaf area index (LAI ) and plant height. Data from the 2002-2003 season were used to establish the relationships between K c,pan and LAI (method A) or plant height (method B), and used to determine the crop coefficient (method C). ET computed by the three methods was compared with measured ET using lysimeters in the 2001-2002 and 2003-2004 seasons. Mean relative error of estimated daily ET by the three methods ranged from 20 to 30%, and the relative error in cumulative ET in the experimental periods ranged from 1 to 19%. Among the three methods, results from methods A and B were not significantly different from each other (P > 0.01), and were closer to the lysimeter data than results from method C (P < 0.001). Method B, being easier to measure, was recommended for ET estimation in NCP. List of symbols

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Section: Introductionmentioning

confidence: 99%

Sprinkler irrigation scheduling of winter wheat in the North China Plain using a 20 cm standard pan

Liu

Kang

2006

Irrig Sci

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“…Secondly, the amount of irrigation in the SDI treatment was sufficiently low to prevent deep infiltration, reducing the loss of nutrients [13]. BI resulted in more rapid leaching of chemicals than SDI, which led to different nutrient distribution patterns and variations in the growth and profile distribution of roots [56,57]. Finally, in the SDI treatment, the drip emitters were near the soil surface, which resulted in minimal damage to the topsoil structure and therefore was advantageous for gas exchange between the soil and the atmosphere [14,55].…”

Section: Effects Of Soil Water Movement On Root Development Of Transpmentioning

confidence: 99%

Root Development of Transplanted Cotton and Simulation of Soil Water Movement under Different Irrigation Methods

Zhang

Liu

Sun

et al. 2017

Water

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Abstract:Winter wheat and cotton are the main crops grown on the North China Plain (NCP). Cotton is often transplanted after the winter wheat harvest to solve the competition for cultivated land between winter wheat and cotton, and to ensure that both crops can be harvested on the NCP. However, the root system of transplanted cotton is distorted due to the restrictions of the seedling aperture disk before transplanting. Therefore, the investigation of the deformed root distribution and water uptake in transplanted cotton is essential for simulating soil water movement under different irrigation methods. Thus, a field experiment and a simulation study were conducted during 2013-2015 to explore the deformed roots of transplanted cotton and soil water movement using border irrigation (BI) and surface drip irrigation (SDI). The results showed that SDI was conducive to root growth in the shallow root zone (0-30 cm), and that BI was conducive to root growth in the deeper root zone (below 30 cm). SDI is well suited for producing the optimal soil water distribution pattern for the deformed root system of transplanted cotton, and the root system was more developed under SDI than under BI. Comparisons between experimental data and model simulations showed that the HYDRUS-2D model described the soil water content (SWC) under different irrigation methods well, with root mean square errors (RMSEs) of 0.023 and 0.029 cm 3 cm −3 and model efficiencies (EFs) of 0.68 and 0.59 for BI and SDI, respectively. Our findings will be very useful for designing an optimal irrigation plan for BI and SDI in transplanted cotton fields, and for promoting the wider use of this planting pattern for cotton transplantation.

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“…In the past irrigators used a simple rule of thumb to trigger irrigation when about half of the ASW was depleted (Evans et al, 1996;Hill, 2002). However, recent research has proved this rule to be inadequate for intensively managed high-value crops which are more sensitive to water stress (Home et al, 2002;Kashyap and Panda, 2003). The MAD is now precisely recommended depending on the crop grown, the development stage, as well as the irrigation system used (Reddy and Reddy, 1993;Panda et al, 2004).…”

Section: Surveymentioning

confidence: 99%

Assessing On-Farm Irrigation Water Use Efficiency in Southern Ontario

Bernier¹,

Madramootoo²,

Mehdi³

et al. 2010

Canadian Water Resources Journal

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For high-value horticultural crop production in southern Ontario, irrigation is an essential ingredient in overcoming insufficient rainfall and achieving stabilized crop production. In a context where competition for limited water resources intensifies due to the expansion of the agricultural sector, increasing urban development and tourism, and potential climate change impacts, conserving water through efficient irrigation has become a key solution in addressing this growing challenge. The implementation of advanced soil water monitoring technologies and water budgeting methods for improved irrigation scheduling is examined with regard to water conservation and thus as a means to cope with competing demands for limited water supplies. During the 2007 growing season, soil moisture was measured using two sensors at four field sites (comprising a total of six irrigated zones as two sites include two different irrigation/production systems) in southern Ontario. Irrigation water consumption was measured by flow meters at three sites. In addition, a survey was administered to collect information on growers' current irrigation scheduling practices. On-farm irrigation performance was assessed by comparing calculated tomato, green bell pepper, strawberry and peach water requirements (using the water budget method) with growers' estimates of irrigation water use and with soil moisture measurements taken during the growing season. Four out of the six irrigated zones were excessively irrigated, while in one zone, water was insufficiently applied. The crop water requirements were met efficiently exclusively in one zone where tomatoes were grown. Overall, the results of this research show that by implementing advanced soil moisture monitoring technologies, growers can increase precision in water application and reduce the uncertainty in their current irrigation scheduling practices.Résumé : Dans le sud de l'Ontario, l'irrigation est essentielle à la production de cultures horticoles à haute valeur ajoutée afin de compenser l'insuffisance de précipitations et stabiliser la production des cultures. Dans un contexte où la compétition pour les ressources limitées en eau s'intensifie en réponse à l'expansion du secteur agricole, à la croissance du développement urbain et du tourisme, ainsi qu'aux impacts potentiels des changements climatiques, conserver l'eau grâce à des techniques d'irrigation économes est devenue une solution incontournable pour affronter ce défi grandissant. L'implémentation de technologies avancées de surveillance de la teneur en eau dans le sol et d'un bilan hydrique, pour améliorer 116 Canadian Water Resources Journal/Revue canadienne des ressources hydriques

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Effect of method and scheduling of irrigation on water and nitrogen use efficiencies of Okra (Abelmoschus esculentus)

Cited by 37 publications

References 6 publications

Sprinkler irrigation scheduling of winter wheat in the North China Plain using a 20 cm standard pan

Sprinkler irrigation scheduling of winter wheat in the North China Plain using a 20 cm standard pan

Root Development of Transplanted Cotton and Simulation of Soil Water Movement under Different Irrigation Methods

Assessing On-Farm Irrigation Water Use Efficiency in Southern Ontario

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