Tillage × Rotation × Management Interactions in Corn

Katsvairo, Tawainga W.; Cox, William J.

doi:10.2134/agronj2000.923493x

Cited by 36 publications

(27 citation statements)

References 23 publications

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“…The ERS data are based on USDA's National Agricultural Statistical Service (NASS) agricultural chemical usage data sets. These data do not differentiate across crop rotations, even though there is agronomic evidence that continuous corn needs to receive higher levels of fertilizer (Raimbault and Vyn 1991, Katsvairo and Cox 2000, Pikul et al 2005. Unfortunately, there is little historical large scale data on the management of continuous corn rotations.…”

Section: Economic Modeling Componentmentioning

confidence: 99%

Potential water quality changes due to corn expansion in the Upper Mississippi River Basin

Secchi¹,

Gassman²,

Jha³

et al. 2011

Ecological Applications

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Abstract. While biofuels may yield renewable fuel benefits, there could be downsides in terms of water quality and other environmental stressors, particularly if corn is relied upon exclusively as the feedstock. The consequences of increased corn production will depend importantly on where (and how) the additional corn is grown, which, in turn, depends on the characteristics of land and its associated profitability. Previous work has relied on rules of thumb for allocating land to increased acreage based on historical land use or other heuristics. Here, we advance our understanding of these phenomena by describing a modeling system that links an economics-driven land use model with a watershed-based water quality model for the Upper Mississippi River Basin (UMRB). This modeling system is used to assess the water quality changes due to increased corn acreage, which is associated with higher relative corn prices. We focus on six scenarios based on six realistic pairs of corn and soybean prices which correspond to a scale of decreasing soybean to corn price ratio. These price-driven land use changes provide estimates of the water quality effects that current biofuel policies may have in the UMRB. Our analysis can help evaluate the costs and environmental consequences associated with implementation strategies for the biofuel mandates of the new energy bill. The amounts of total N and P delivered to the outlet of the UMRB (located at Grafton, Illinois, USA) rise as corn production becomes more intensive in the region. Our results indicate that a 14.4% in corn acreage in the watershed due to corn intensification in the most economically profitable locations would result in a 5.4% increase in total nitrogen loads and in a 4.1% increase in total phosphorus loads at Grafton. Our most aggressive scenario, driven by high but not out of reach crop prices, results in about a 57% increase in corn acreage with a corresponding 18.5% increase in N and 12% increase in P. These are somewhat conservative increases in nutrients, compared to those of previous studies, likely due to our focus on cultivated cropland which is already heavily fertilized.

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Section: Economic Modeling Componentmentioning

confidence: 99%

Potential water quality changes due to corn expansion in the Upper Mississippi River Basin

Secchi¹,

Gassman²,

Jha³

et al. 2011

Ecological Applications

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“…The greater the diversity and number of tactics adopted, the more successful and durable the overall weed management program becomes . Generally, the combination of many tactics provides better weed management than the simple addition of individual tactics …”

Section: Adoption Of Selected Iwm Strategies To Manage Hr Weedsmentioning

confidence: 99%

“…However, for more complex crop rotation schemes, one crop without a herbicide treatment may not negatively affect the overall reduction in the weed seedbank. Tillage as part of a crop rotation system can improve weed management, crop yield and profitability (Table ) . Crop rotation used for HR weed management was reported to be effective for 97% of the respondents to the 2013 Iowa Farm and Rural Life Poll (Table ) .…”

Section: Adoption Of Selected Iwm Strategies To Manage Hr Weedsmentioning

confidence: 99%

Integrated pest management and weed management in the United States and Canada

et al. 2014

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There is interest in more diverse weed management tactics because of evolved herbicide resistance in important weeds in many US and Canadian crop systems. While herbicide resistance in weeds is not new, the issue has become critical because of the adoption of simple, convenient and inexpensive crop systems based on genetically engineered glyphosate-tolerant crop cultivars. Importantly, genetic engineering has not been a factor in rice and wheat, two globally important food crops. There are many tactics that help to mitigate herbicide resistance in weeds and should be widely adopted. Evolved herbicide resistance in key weeds has influenced a limited number of growers to include a more diverse suite of tactics to supplement existing herbicidal tactics. Most growers still emphasize herbicides, often to the exclusion of alternative tactics. Application of integrated pest management for weeds is better characterized as integrated weed management, and more typically integrated herbicide management. However, adoption of diverse weed management tactics is limited. Modifying herbicide use will not solve herbicide resistance in weeds, and the relief provided by different herbicide use practices is generally short-lived at best. More diversity of tactics for weed management must be incorporated in crop systems.

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“…silvinomoreira@dag.ufsj.br. aggregating this nutrient to the straw, which, when decomposed, supplies the N to the successive crop (ALMEIDA et al, 2008;TORRES;PEREIRA;FABIAN, 2008). Long-term studies have demonstrated higher corn yield in rotation with soybeans, even under restricted nutrients availability, when compared with monocultures with adequate nutritional supply (KATSVAIRO;COX, 2000;STANGER;LAUER, 2008).…”

Section: Introductionmentioning

confidence: 99%

Profitability and efficiency of fertilization in a corn/ soybean/corn system in a Latosol with improved fertility

Hickmann¹,

Resende²,

Silva³

et al. 2018

R. Agrogeoambiental

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Currently, there are some doubts regarding fertilization dimensioning that aims at a high grain yield in soils with improved fertility in a crop rotation system. Thus, the objective of this study was to evaluate the yield and profitability resulting from different combinations of NPK fertilization and the efficiency of these nutrients in sequential crops of corn/soybean/corn, in a Latosol with improved fertility, in a farm located in the region of Campo das Vertentes, Minas Gerais State, Brazil. Four doses of sowing fertilization and topdressing were compared, corresponding to approximate proportions of 25, 50, 100 and 150 % of the doses usually applied by farmers. Nutrients sources varied according to the inputs used in the farm for each crop. In a soil with improved fertility, corn is more responsive to fertilization than soybean, with higher grain yield gains associated with N and K supply, while P is less limiting. The most profitable nutrients combination for this system involves increasing the amounts of N and K and reducing the amount of P in relation to the standard fertilization employed on the farm, providing a 14.3 % higher profit and higher average nutrient use efficiency.

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Tillage × Rotation × Management Interactions in Corn

Cited by 36 publications

References 23 publications

Potential water quality changes due to corn expansion in the Upper Mississippi River Basin

Potential water quality changes due to corn expansion in the Upper Mississippi River Basin

Integrated pest management and weed management in the United States and Canada

Profitability and efficiency of fertilization in a corn/ soybean/corn system in a Latosol with improved fertility

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