Farm Machinery Economics

Edwards, William

doi:10.13031/2013.15219

Cited by 4 publications

(4 citation statements)

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“…The processing costs of pellets include repair and maintenance ($/hr), electricity ($/kWh), lubrication ($/hour) and labour costs ($/hr). These costs were calculated based on the procedures discussed by Edwards (2009); Merkle and Cunningham (2011); Pirraglia et al (2010); Heil and Ciolkosz (2017) and Ciolkosz et al (2017). Repair and maintenance and lubrication costs were calculated for each piece of machinery in the pellet mill (pieces of equipment range from $2921 to $8662) and summed to get the total costs.…”

Section: Economic Model and Methodologymentioning

confidence: 99%

Techno-economic analysis of plantation biomass production and small-scale wood pellet processing for bioenergy market

Yuldashev

Illukpitiya

Tegegne

et al. 2020

International Wood Products Journal

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There has been an increased demand for wood pellets for energy production, hence pellet production is a valuable market opportunity to explore. The purpose of the study was to assess the economic feasibility of on-site wood pellet processing for bioenergy market. The benefit-cost model was used to estimate the nett return over the projected investment period. Monte Carlo simulation was performed for the possible range of nett returns and to identify the effect of stochastic variables on profitability. The simulation results showed positive nett return from both biomass production and processing of pellets. The sweetgum yield, market price of biomass and pellet, and projected volume of pellets had the greatest positive effect on profitability. The results will help to make pelletizing readily available to those who are looking to make the switch and go green by using alternative and renewable energy.

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Section: Economic Model and Methodologymentioning

confidence: 99%

Techno-economic analysis of plantation biomass production and small-scale wood pellet processing for bioenergy market

Yuldashev

Illukpitiya

Tegegne

et al. 2020

International Wood Products Journal

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“…The variable irrigation costs (ICs) (energy, repairs and maintenance, and labor) to operate the center pivot system were used when estimating net returns. Costs were estimated using the American Society of Agricultural and Biological Engineers (Fairbanks et al, 1971), Iowa State Machinery Costs (Edwards, 2015), and University of Arkansas Center Pivot Corn Irrigation Budgets (Watkins, 2022). Fixed ICs (depreciation, interest, taxes, and insurance and housing) were not included in the analysis.…”

Section: Cost Of Irrigation and Net Returnmentioning

confidence: 99%

Effective irrigation scheduling to improve corn yield, net returns, and water use

Sheldon,

Shekoofa,

McClure

et al. 2023

Agrosystems Geosci & Env

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Irrigated cropland continues to increase in Tennessee to sustain yield when seasonal temperatures are high and water deficit occurs. Corn (Zea mays L.) production is directly related to water availability. Inefficient irrigation scheduling can result in excessive or inadequate water applications. The objective of this study was to optimize profitable corn yield using soil water sensors to improve irrigation scheduling. Three irrigation regimes plus a rainfed/check were evaluated in a field study at the University of Tennessee Milan Research and Education Center in 2020 and 2021. Soil water level was monitored with Meter Inc. Teros 21 matric potential sensors and ZL6 soil‐water loggers. Irrigation‐scheduling decisions were based on rainfall, plant growth stages, and soil water sensors. An optimal irrigation schedule was determined within this study that increased yield by 13.0% and 3.0%, respectively, in 2020 and 2021 while also having the lowest cost among irrigation treatments. Results indicate that irrigation scheduling can improve yield, conserve water, and increase economic returns.

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“…Labor was charged at US$19 h −1 . Tractor hourly costs were based on methods proposed by Edwards (Edwards, 2023). The fixed costs included machinery and spray equipment.…”

Section: Partial Budget Analysismentioning

confidence: 99%

Weed control with saturated steam in organic highbush blueberry

Moretti,

Pedroso

2023

Front. Agron.

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Weed management is often a predominant and costly problem in the production of organic blueberries. Geotextile weed fabrics of woven polyethylene are widely used in organic blueberry fields to suppress weeds growing within the rows. Weeds, such as Convolvulus arvensis L., grow at the base of the blueberry plants or through openings and around the edges of the weed fabric, thus requiring hand weeding. This study evaluates the integration of saturated steam (SS), a rotary brush (RB), and organic herbicides for weed control in blueberries. Dose–response studies indicated that SS applied at 121°C and at 7.4 m3 ha−1 of steam (3,655 MJ ha−1) resulted in over 90% control and a reduction in the dry weights of C. arvensis. When treatments were directed to the base of the blueberry plants, SS at 7.4 m3 ha−1 provided 80% control of C. arvensis 28 days after treatment (DAT) and was comparable to hand weeding. Both of these treatments outperformed capric plus caprylic acid (CC) (33.2 kg ai ha−1) or ammonium nonanoate (AN) (24.3 kg ai ha−1) applications, despite C. arversis regrowth being observed. Four repetitive basal applications of SS of up to 29.6 m3 ha−1 over two consecutive years caused minimal and transient damage to new basal shoots of ‘Elliot’ and ‘Duke’ blueberries; basal shoot cross-sectional area compared with the non-treated was unaffected. In contrast, basal application of AN treatments damaged or killed basal shoots. When treatments were applied to the edge of the weed fabric, SS (7.4 m3 ha−1) reduced weed biomass by 42% to 93% at 28 DAT compared with the non-treated. The RB treatment reduced weed biomass from 72% to 99% in all experiments, while CC and AN reduced biomass by 18% to 54%. A partial budget analysis indicated that SS and the RB were 3- and 6.5-fold less expensive than organic herbicides, respectively. Integrating physical (SS) and mechanical (RB) treatments improved weed control. The latter, however, damaged the weed-suppressing fabric where preexisting holes were present, generated dust, and increased the chance of fruit contamination. The SS was safe for the weed-suppressing fabric and the blueberry, but weed regrowth following treatment and copious water requirements hindered its feasibility.

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Farm Machinery Economics

Cited by 4 publications

References 0 publications

Techno-economic analysis of plantation biomass production and small-scale wood pellet processing for bioenergy market

Techno-economic analysis of plantation biomass production and small-scale wood pellet processing for bioenergy market

Effective irrigation scheduling to improve corn yield, net returns, and water use

Weed control with saturated steam in organic highbush blueberry

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