A Comparative cost Analysis of Vegetable Irrigation Systems

Prevatt, J. Walter; Clark, G. A.; Stanley, C. D.

doi:10.21273/horttech.2.1.91

Cited by 14 publications

(8 citation statements)

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“…The adoption of drip irrigation by commercial tomato producers has been slow due to the increased management required and the increased cost compared to sprinkler or subsurface irrigation (Prevatt et al, 1984). As the need to conserve water increases due to urbanization, producer interest in drip irrigation has increased.…”

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Water Application Scheduling by Pan Evaporation for Drip-irrigated Tomato

Locascio¹,

Smajstrla²

1996

jashs

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Tomatoes (Lycopersicon esculentum Mill.) were grown on an Arredondo fine sandy soil to evaluate the effects of water quantity applied by drip irrigation scheduled by pan evaporation in a 3-year study. Water was applied to polyethylene-mulched tomatoes at 0, 0.25, 0.50, 0.75, and 1.0 times pan evaporation in one application per day. Irrigation was also scheduled with tensiometers to apply water to maintain soil water tension above 10 cb. The response to irrigation varied with rainfall during the three seasons. In an extremely dry season, fruit yields were doubled by irrigation. Total fruit yields were highest with irrigation quantities of 0.75 and 1.0 times pan and significantly lower with 0.25 and 0.50 times pan. In an extremely wet season, fruit yields were not influenced by water quantities from O to 1.0 times pan. In a third season that was wet from the middle to the end of the season, irrigation more than doubled the marketable fruit yield. However, with an increase in water quantity from 0.25 to 0.75 times pan, yield increased only from 65.9 to 74.1 t·ha-1. Water uses during the three seasons with 0.75 pan were 31.8, 31.1, and 29.6 cm, respectively. Fruit yields were similar with the 0.75-pan and 10-cb tensiometer treatments, but water uses with the latter treatment were 15.8, 17.0, and 18.4 cm during the three seasons, respectively. Tomato leaf N concentrations were reduced slightly with each increase in water quantity applied, even though N was applied with drip irrigation. Leaf N concentrations with the 10-cb treatment were generally equal to or higher than the concentrations with 0.75 pan.

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Water Application Scheduling by Pan Evaporation for Drip-irrigated Tomato

Locascio¹,

Smajstrla²

1996

jashs

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“…B -The average incremental cost of drainage materials and installation is $353 per feddan (World Bank, 2000). C -Estimates of the fixed cost of a drip system include $875 per feddan on vegetables in Florida (Prevatt et al, 1992), $1,018 per feddan on almonds in California (Schwankl et al, 1999), and an aggregate range of $630 to $1,050 per feddan (Pastel et al, 2001). The estimated cost of $840 per feddan is within that range.…”

Section: Preliminary Empirical Analysis Of the Toshka Projectmentioning

confidence: 99%

Moving Water to Move People

Wichelns¹

2003

Water International

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This paper examines economic aspects of the large-scale irrigation project that is currently under construction in the southern desert of Egypt. Lonergan and Wolf (2001) suggest that success of the Toshka project will be determined largely by the degree to which private firms invest in agricultural enterprises in the region. That perspective does not account for the public costs of attracting private firms or the opportunity costs of capital and other scarce resources invested in the project. This note presents a conceptual framework that addresses those issues and an empirical example that provides a preliminary indication of the potential costs and benefits of the Toshka project. The role of government subsidies in attracting private sector investments also is discussed.

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“…Other advantages include multiple cropping options (Stanley et al, 1991) and reduced bed widths to minimize plastic and soil fumigation costs (Clark and Maynard, 1992), both of which provide economic incentives to vegetable growers. However, the typically high conversion costs for irrigation systems (Prevatt et al, 1992) generally have retarded large-scale adoption of drip irrigation when other less costly irrigation systems are in place.…”

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