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  1. Agricultural IPM
  2. Field Crops
  3. Alfalfa
  4. Crop Management
Alfalfa Crop Management
Nutrient Budget Calculator

The Nutrient Budget Tool is a resource for growers who are interested in adequately providing the correct amount of nutrients for their crops for the optimal yields. This tool allows growers to choose crop type and yield goals into a spreadsheet that will then output the needed fertilizer levels of N, P, K needed to meet projected yield goals. Soil test, irrigation water test, and manure nutrient test analysis results can also be input to calculate the overall results of a crop’s nutrient/fertilizer needs. This tool is designed to help promote soil testing and analysis and to help growers be more cost and nutrient efficient. We plan to expand the Nutrient Budget Tool in the future to incorporate soil salinity levels (EC) and pH to better service the nutrient budget users and provide greater information.

 

Download:

Nutrient Budget Tool

 

1. Choose the crop from the list of tabs at the bottom of the screen.


2. Fill in the “Plan Area” field in acres and “Yield Area” field in lbs/acre or tons/acre. Doing this will provide the needed N, P, and K requirements of the specified plan area.

3. Additional numbers from irrigation water analysis, soil analysis and fertilizer analysis from a plan area can be input to factor in to the overall needed requirements for N, P, and K in lbs/plan area.

 

 


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Alfalfa Crop Management Publications
  • Feb 2014
    Renovating Alfalfa Stands in Arizona
    Publication (PDF, 515KB)
    Authors: Shawna Loper and Mike Ottman
    Alfalfa is an important crop grown in Arizona with approximately 250,000 acres in production in 2011 and 2012 and 260,000 acres for 2013. As alfalfa stands age, they can thing and decline in plant density. This article takes a look at renovating alfalfa stands in Arizona.
  • Jan 2014
    Summer Slump in Alfalfa
    Publication (PDF, 425KB)
    Authors: Mike Ottman and Ayman Mostafa
    “Summer slump” is a decline in growth of alfalfa usually beginning in July in areas where maximum daily temperature exceeds 100 °F, such as the low elevation deserts of Southwestern U.S. This article discusses some of the causes behind this and potential impacts.
  • Apr 2008
    Alfalfa Weed Control in the Low Deserts of Arizona
    Publication (PDF, 443KB)
    Authors: Barry Ticks and Mike Ottman
    Alfalfa is a vigorous crop that is very competitive with weeds. However, chemical weed control is often necessary even in well managed alfalfa since the marketplace has a low tolerance for weeds in alfalfa hay.
  • Jul 1999
    Growing Alfalfa for Seed in Arizona
    Publication (PDF, 29KB)
    Authors: Stephen H. Husman
    Due to worldwide shortages of non-dormant alfalfa seed, production opportunities and acreage have increased recently in central Arizona. This article gives some suggestions regarding growing alfalfa for seed in Arizona.
  • Mar 1991
    Diseases and Nutritional Disorders of Alfalfa in Arizona
    Publication (PDF, 10MB)
    Authors: Richard B. Hine, Michael J. Ottman, and Thomas A. Doerge
    Alfalfa is currently grown on approximately 20 percent of the total irrigated crop land in Arizona. This article lists the diseases and nutritional disorders of Alfalfa and gives a lengthy description of each of them.

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Alfalfa Crop Management Presentations
  • Sep 2013
    Nutrient Management and Plant Density Recommendations For LA PAZ county Alfalfa Growers
    Presentation (PDF, 2.38MB)
    Authors: Shawna Loper
    Location Presented: Parker, AZ

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ARIZONA PEST MANAGEMENT CENTER
University of Arizona
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Maricopa Agricultural Center

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