Estimating Economically Optimal Levels of Nitrogen Fertilizer in No-Tillage Continuous Corn

Villacis, Alexis H.; Ramsey, A. Ford; Delgado, Jorge A.; Alwang, Jeffrey

doi:10.1017/aae.2020.23

Cited by 9 publications

(3 citation statements)

References 16 publications

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“…Since in 2018 (study 1) no significant differences were observed from 202 kg N ha −1 to 314 kg N ha −1 for either the BMP or TMP with the same plant population, in 2019 (study 2) and 2020 (study 3) the experiment was repeated in those same plots, except with 2 levels of crop row spacing (38.1 and 76.2 cm) and 2 levels of N application (0 and 202 kg urea N ha −1 ) (Table 1). This response to N rate from study 1 agrees with findings from Villacis et al [31] that reported profit-maximizing N rates ranging from 162 to 197 kg N ha −1 for continuous no-till corn planted at 76.2 cm row spacing.…”

Section: Methodssupporting

confidence: 90%

Use of Narrow Rows in Sprinkler-Irrigated Corn Systems to Increase Grain Yields, Aboveground Biomass, and Water and Nitrogen Use Efficiencies

et al. 2021

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Narrow rows and optimum nitrogen applications are effective best management practices (BMPs) to enhance crop yield in an economically viable way. In a set of four studies, we aimed to compare the traditional method of planting (TMP) in wider rows (76.2 cm) with a lower plant population (84,600 seeds ha−1) against a new BMP of planting in narrow rows (38.1 cm) with a higher plant population (158,000 seeds ha−1). Implementation of the BMP resulted in 29.9 Mg ha−1 of dry matter (DM) silage, which was 42.5% higher than the 21.0 Mg ha−1 observed with the TMP. The p-values for the BMP versus TMP silage comparisons were p < 0.05, p < 0.05 and p < 0.001 for studies 2, 3, and 4, respectively, showing the significantly higher production with the BMP. Silage production water use efficiency (WUE) and agronomic nitrogen use efficiency (AE) were also higher with the BMP in studies 2, 3 and 4. The average harvested grain DM of the three BMP studies (9.9 Mg ha−1) was 9.5% higher than the 9.0 Mg ha−1 harvested grain DM with the TMP. The BMP of narrow rows with higher plant populations increases silage and grain production in sprinkler-irrigated systems.

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Section: Methodssupporting

confidence: 90%

Use of Narrow Rows in Sprinkler-Irrigated Corn Systems to Increase Grain Yields, Aboveground Biomass, and Water and Nitrogen Use Efficiencies

et al. 2021

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“…The estimates used were those for the stochastic linear response plateau function from continuous corn. Estimates by Villacis et al (2020) were similar.…”

Section: Yield-monitor Datamentioning

confidence: 61%

Using Data from Uniform Rate Applications for Site-Specific Nitrogen Recommendations

Park,

Brorsen,

2024

J. Agric. Appl. Econ.

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Much historical yield-monitor data is from fields where a uniform rate of nitrogen was applied. A new approach is proposed using this data to get site-specific nitrogen recommendations. Bayesian methods are used to estimate a linear plateau model where only the plateau is spatially varying. The model is then illustrated by using it to make site-specific nitrogen recommendations for corn production in Mississippi. The in-sample recommendations generated by this approach return an estimated $9/acre on the example field. The long-term goal is to combine this information with other information such as remote sensing measurements.

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“…Finger (2012) and Meyer-Aurich et al (2020) found that nitrogen taxes reduce N fertiliser levels and thus reduce N emissions from agriculture. While Villacis et al (2020) found that the profit-maximising nitrogen rates ranged from 162 to 197 kg/ha for fertiliser prices of $0.72, $0.96 and $1.20.…”

Section: Discussionmentioning

confidence: 99%

Economic evaluation of increased nitrogen fertiliser prices on risk-efficient fertiliser applications

Matthews

Grové

2023

Outlook Agric

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World market prices for food and fertiliser have increased significantly, leading to concerns about the impact of high food prices on food security. Therefore, the article investigates the effect of increased nitrogen fertiliser prices on optimal fertiliser use decisions for maize under irrigation, considering the uncertainty regarding maize crop yield response to nitrogen fertiliser application in different production years. The results showed that as the fertiliser price increases from 5 to 19 ZAR/kg, the amount of fertiliser applied decreases from the maximum of 220 kg/ha to around 100 kg/ha. Increased N fertiliser prices would decrease the amount of fertiliser applied, although the response is determined by the combination of fertiliser price, soil used, fertiliser application method and risk behaviour. The expected yields estimated for the optimal nitrogen fertiliser levels showed flat yield responses to decreased fertiliser application levels. The reduction in crop yields due to reduced fertiliser use is never more than 300 kg/ha. The results suggest that the soil used for production does not greatly impact the crop response since the optimal fertiliser decision is adjusted to ensure the maximum possible expected yield. However, the decision to use a single or split application does impact the optimal fertiliser use decision with higher application levels for a split application and a slightly lower crop yield response. The main conclusion is that increased nitrogen fertiliser prices would decrease the amount of fertiliser applied; however, the effect on expected crop yield would be minimal.

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Estimating Economically Optimal Levels of Nitrogen Fertilizer in No-Tillage Continuous Corn

Cited by 9 publications

References 16 publications

Use of Narrow Rows in Sprinkler-Irrigated Corn Systems to Increase Grain Yields, Aboveground Biomass, and Water and Nitrogen Use Efficiencies

Use of Narrow Rows in Sprinkler-Irrigated Corn Systems to Increase Grain Yields, Aboveground Biomass, and Water and Nitrogen Use Efficiencies

Using Data from Uniform Rate Applications for Site-Specific Nitrogen Recommendations

Economic evaluation of increased nitrogen fertiliser prices on risk-efficient fertiliser applications

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