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• W2029124041 abstract "Manure management recommendations and practices should be preceded by a whole-farm, comprehensive manure management plan, but manure planning aids have shortcomings that limit their widespread use. The Manure Application Planner (MAP), version 3.0, is a computer software tool used for developing or assessing manure application plans that meet environmental standards and achieve economic feasibility. Manure source quantity and analyses, field nutrient needs and nutrient sensitivity, and nutrient pricing and application cost information form the main categories of program input. Manure and fertilizer application rates are calculated using a linear programming optimization procedure or entered from a predetermined plan. The linear programming algorithm uses environmental, economic, and logistical constraints in its operation to develop an optimized plan. Or, with a producer's predetermined or existing plan, economic factors (fertilizer replacement value, application costs, and hauling costs) are presented and environmental concerns (excess nutrients) are shown. Output information includes manure and fertilizer application rates, total nutrient quantities of each source needed, excess nutrients applied from the manure, residual N availability for the following year, leftover stored manure (if any), and nutrient costs for each field and the farm with and without the use of manure. The combination of individualized input for each farm and/or field and access to the program's dataset coefficients allows for customized, farm-specific manure management plans. Research Question A whole-farm, comprehensive nutrient application plan has to be developed by livestock producers as a means of accountability for their manure management. The Manure Application Planner (MAP), version 3.0, is a computer software tool used for developing or assessing manure application plans that meets environmental standards and achieves economic feasibility. The primary objective of the program is to facilitate a process on how agricultural producers can best take advantage of manure as a nutrient resource for crop production. Based on individual farm planning data, it helps the user calculate an application plan that does not over apply N or P to the crop and that is also cost effective. The program can also be used to assess a producer's plan in terms of nutrient shortages or excesses. It will allow the user to compare the cost of applying manure vs. applying commercial fertilizer as well as providing an economic and environmental assessment of various management decision combinations a producer might want to consider. Software Description MAP is a stand-alone software package written in Borland Pascal 7.0. It uses a menu-driven interface allowing the user to perform file management, enter data, view output on the screen, print output, print input, and edit the default program variables. MAP also incorporates a commercially available linear programming algorithm from Eastern Software Products. Manure source quantity and analyses, field nutrient needs and nutrient sensitivity, and nutrient pricing and application cost information form the main categories of program input. Manure and fertilizer application rates are calculated using a linear programming optimization procedure or entered from a predetermined plan. Output includes: (i) an application summary, which includes nutrient rates, credits, excesses, and costs; (ii) a field application summary, the same information as the application summary, but only for one field; and (iii) a management plan, which is composed of a recordkeeping section for fields records and actual field input application summaries. Applied Question How is MAP unique among the various manure management decision aids available for the producer? Manure management practices often are highly influenced by the economic ramifications of the proposed practices for a farm. As a starting point, MAP can use a linear programming algorithm to determine an optimum application plan. The objective of this algorithm is to minimize the costs of manure application, manure hauling, and fertilizer application, subject to constraints on N or P limits and nutrient logistics for a farm. A characteristic of a linear programming solution is that the objective and constraints are considered simultaneously rather than step-wise. Therefore, the specific application rate and method determined by the optimization for a field is interrelated to the application rates and methods for all other fields in the plan. For producers with a predetermined manure application plan, the entire optimization process can be bypassed, with manure application rate and application method being entered along with the field input information. Thus, this software can provide an environmental and economic assessment of the current plan." @default.
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• W2029124041 date "1997-07-01" @default.
• W2029124041 modified "2023-09-27" @default.
• W2029124041 title "Manure Application Planner (MAP): Software for Environmental and Economical Nutrient Planning" @default.
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• W2029124041 doi "https://doi.org/10.2134/jpa1997.0441" @default.
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