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- W2000744076 abstract "A key factor motivating high manure application rates is the spatial concentration oflivestock facilities, which has substantially increased in recent decades. Greater manure productionin a given region creates incentives to over apply manure near livestock facilities in order to avoidhigh hauling costs. A manure transportation and application model (MTA) was developed to simulatemanure application behavior. The model was populated by average national (USA) values for fourtypes of manure for nutrient content, application and hauling expense, crop distributions, cropnutrient removal rates, and other agronomic parameters. The first set of model simulations allowedmanure application at the higher of the N-rate or P-rate (high agronomic rate). Model resultsgenerally illustrate the diseconomies of manure production, e.g., marginal manure value decreasedand maximum manure hauling distances increased as manure availability increased. The modelalso simulated increasing rates of excess phosphorus application (amounts exceeding crop removal)as manure availability increased. To explore the economic impacts of eliminating excess nutrient applications, MTA was rerun with aconstraint limiting manure application to the lower of the N-rate or P-rate (low agronomic rate).Although less commercial fertilizer was required for low agronomic rate scenarios, hauling andapplication costs increased, such that the net cost of switching from a high to a low agronomicapplication rate increased at an increasing rate as manure availability increased. In summary, modelresults indicate that as livestock concentrations increase, there are diseconomies to manureutilization, more excess nutrients are applied, and reducing manure application rates becomes moreexpensive." @default.
- W2000744076 created "2016-06-24" @default.
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- W2000744076 date "2004-01-01" @default.
- W2000744076 modified "2023-09-27" @default.
- W2000744076 title "Impacts of Livestock Concentration and Application Rate Restrictions on Manure Utilization" @default.
- W2000744076 doi "https://doi.org/10.13031/2013.16413" @default.
- W2000744076 hasPublicationYear "2004" @default.
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