Plot Sprinklers for Irrigation Research

Eldredge, Eric P.; Shock, Clinton C.; Stieber, Timothy D.

doi:10.2134/agronj1992.00021962008400060034x

Cited by 19 publications

(12 citation statements)

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“…They reported that reducing irrigation supply resulted in reduced yield and quality. Similarly, research conducted by Eldredge et al (1992), Lynch et al (1995) and Shock et al (1993) showed that reductions in tuber yield and quality could result from a brief period of water stress. Other studies have indicated that yield and quality of potato could be improved with drip irrigation and optimal irrigation scheduling (Singh et al, 1977;Erdem et al, 2006).…”

Section: Introductionmentioning

confidence: 92%

Potato Response to Different Irrigation Regimes Using Saline Water

et al. 2016

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Field experiments were performed to study potato response to irrigation regimes using saline water on a sandy soil in southern Tunisia during the years 2011–2014. Irrigation regimes consisted in the replenishment of cumulated ETc when 35% of the root zone holding capacity is depleted at levels of 100% (I100), 70% (I70) and 40% (I40). The farmer used a fixed irrigation dose and interval, applying 16 mm every 4 days from planting till harvest. Higher soil salinity is observed at harvest under I40 and farmer treatments compared to I100. Highest potato yield was obtained with I100 treatment (24.4–27.5 t ha‐1) across 3 years. Significant reductions in yields were observed under I70 and I40 as compared to I100. The farmer's method also caused significant reductions in yield and resulted in using 15–22% more irrigation water than I100. Water productivity (WP) values varied between 4.3 kg m−3 (farmer) and 18.5 kg m−3 (I40) across different years and treatments. The scheduling technique using the soil water balance (SWB) with variable amounts is more efficient than the farmer's method. Full and deficit treatments (I100 and I70) generated the highest net income. I100 appears to be a promising irrigation strategy for the potato crop in the arid climate of Tunisia. Nonetheless, under water scarcity, irrigation of potato could be scheduled using I70 deficit strategy, with some yield reductions (12.5–23.0%). Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 92%

Potato Response to Different Irrigation Regimes Using Saline Water

et al. 2016

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“…Eldredge et al (1992Eldredge et al ( , 1996 demonstrated that the severity of a single water stress episode progressively increased both poorly formed tubers and sugar ends. Secondary growth may be induced by any condition favoring vegetative growth Bodlaender et al 1964).…”

Section: Physiological Mechanismsmentioning

confidence: 99%

Review Of The Sugar End Disorder In Potato (Solanum tuberosum, L.)

et al. 2008

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Processing quality has become increasingly important to the potato industry. A serious defect in product quality is the physiological disorder known as sugar ends, also referred to as dark ends, jelly ends, translucent ends, and/or glassy ends. Symptoms of the most common type of sugar end include relatively low starch and high sugar content in the basal end of the tuber. Tubers with the sugar end disorder produce French fries that are dark on one end, making the fries unacceptable to consumers. Sugar end potatoes cause time and profit losses at the processing plant and may require blending of loads to meet product specifications, along with the need to change processing protocols. Sugar end can be costly to growers if the tubers have insufficient quality and the crop is rejected for processing. Conditions conducive to the development of sugar ends include high soil temperatures, transitory soil moisture deficits, and insufficient or excess nitrogen fertilization. Tubers are most sensitive to these stresses during early bulking. Historically, several theories have been proposed concerning the mechanism of sugar end development. Research shows that stressed plants produce adequate amounts of assimilate to support continued tuber growth, but accumulate large amounts of sucrose in the basal tissues of the tuber immediately following stress. Accumulated evidence suggests that heat stress and water deficit induce changes in the activities of certain key carbohydrate metabolizing enzymes shifting the tuber from a starch synthesizing function to one of starch mobilization. Genetic resistance to sugar end development is known and the identified traits are highly heritable. This review summarizes sugar end investigations to-date, and presents a list of research-based crop management recommendations that assist potato producers in minimizing the potential for sugar end development in the field.Resumen La calidad de procesamiento de papa se ha vuelto cada vez más importante para la industria. Un defecto serio en la calidad del producto es el desorden fisiológico conocido como punta azucarada, referido también como punta oscura, punta translúcida y/o punta vítrea. Los síntomas de los tipos más comunes de punta azucarada incluyen bajo contenido relativo de almidón y alto contenido de azúcar en el extremo basal del tubérculo. Los tubérculos con punta azucarada producen papas fritas que tienen un extremo oscuro, haciendo la fritura inaceptable para los consumidores. Las papas con extremo azucarado causan pérdida de tiempo y ganancias a la planta procesadora y puede requerir la mezcla de lotes de papa para satisfacer las especificaciones del producto, además de de la necesidad de cambiar los protocolos de procesamiento. La punta azucarada Am. puede ser costosa para los productores si los tubérculos son de calidad insuficiente y el cultivo es rechazado para procesamiento. Las condiciones que conducen al desarrollo de este desorden incluyen altas temperaturas del suelo, deficiencia transitoria de agua e insuficiencia o exceso de ...

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“…Nitrogen loss to groundwater and soil losses in terms of sediment in runoff are aggravated by over-irrigation. Under-irrigation of potato and onions leads to losses in yield and quality (Eldredge et al 1992(Eldredge et al , 1996Shock and Feibert 2002;Shock et al 1993bShock et al , 1998bShock et al , 2000aShock et al , 2002a. Irrigating only when a crop needs water means that less water is used, less energy is used for pumping, less nitrogen is leached preventing additional groundwater pollution, and both crop yield and quality can be higher.…”

Section: Irrigation Managementmentioning

confidence: 99%

“…Criteria for irrigation Soil water criteria for irrigating vary depending on the crop, the type of soil, and the type of irrigation (Shock et al 2007c;Shock and Wang 2011). For Malheur County, the criteria for different crops' needs have been developed at the Malheur Experiment Station of Oregon State University (Eldredge et al 1992(Eldredge et al , 1996Shock and Feibert 2002;Shock et al 1993bShock et al , 1998bShock et al , 2000aShock et al , 2002aShock et al , b, 2007cThompson et al 2008). Soil moisture monitoring devices When irrigation criteria based on soil moisture have been established, an easy, reliable method of measuring soil water is essential for grower adoption of this irrigation scheduling technique.…”

Section: Irrigation Managementmentioning

confidence: 99%

Research, Extension, and Good Farming Practices Improve Water Quality and Productivity

Shock

2012

Journal of Integrative Agriculture

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Agriculture in southeastern Oregon and southwestern Idaho known collectively as the Treasure Valley has depended on furrow irrigation using heavy inputs of water and nitrogen (N) fertilizer. Crop rotations include onion, corn, wheat, sugar beet, potato, bean, and other crops. By 1986 groundwater had become contaminated with nitrate and residues of the herbicide chlorthal-dimethyl (DCPA); an official groundwater management area was established by the Oregon Department of Environmental Quality along with an action plan and well monitoring network. The action plan allowed for a trial period to see whether voluntary changes would improve trends. Researchers, producers, and agencies cooperated to develop production options that had the possibility of being both environmentally protective and cost effective. Options were tested to improve irrigation practices, increase N fertilizer use efficiency on several rotation crops, and find a cost effective replacement for DCPA. Research demonstrated the opportunity for increased productivity through both irrigation scheduling and the adoption of drip and sprinkler systems. Fertilizer research demonstrated that smaller, more frequent N applications were more efficient than a single large application. Effective, lower cost herbicides replaced DCPA. Research results were effectively delivered through many means and voluntarily adopted. Both groundwater nitrate and DCPA residues are declining. Productivity has increased.

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Plot Sprinklers for Irrigation Research

Cited by 19 publications

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Potato Response to Different Irrigation Regimes Using Saline Water

Potato Response to Different Irrigation Regimes Using Saline Water

Review Of The Sugar End Disorder In Potato (Solanum tuberosum, L.)

Research, Extension, and Good Farming Practices Improve Water Quality and Productivity

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