Junior Agricultural Mechanics Project Show

San Antonio Livestock Show & Rodeo
1929 John Deere D 
1929 John Deere D

JAM Superintendent
Dr. Lon R. Shell
Distinguished Professor Emeritus - Retired
Agricultural Systems Management
Texas State University
San Marcos, TX 78666

Phone:  (512) 753-4944
E-mail: tractor@lonshell.com
JAM Assistant Superintendent
Mr. Pat Real
Agriculture Science Teacher - Retired
Lecturer - Agriculture Systems Management
Texas State University
San Marcos, TX 78666

Phone: (210) 326-9523
E-mail: realfarm@swbell.net
JAM Assistant Superintendent
Mr. Charles Prause
Agriculture Science Teacher - Retired
JAM Dean of Judges
Valley Mills, TX 76689

Phone: (254) 495-4630
E-mail: prausecharles63@gmail.com 

The Junior Agricultural Mechanics (JAM) project show is a unique contest held annually during the San Antonio Stock Show and Rodeo.

JAM documents are found on  the San Antonio Stock Show & Rodeo WEB (see Stock Show link below).  To get to Agricultural Mechanics put curson on Compete at top of page and Agricultural Mechanics will drop down. Click on it. Links to Judges Sheets and judging documents along with Show Results are provided.

  • Encourage, recognize, facilitate and reward learning and the development of skills through the design, construction and exhibition of agricultural projects and/or Tractor Restoration
  • Showcase the outstanding leadership, technical abilities and accomplishments of Texas youth.


Helpful Links

San Antonio  Stock Show& Rodeo
Codes of Federal Regulations  (CFR) Transportation - Title 49-Subtitle B-Chapter III
Trailers: Federal Lighting Equipment Location Requirements (Revised)
ASABE American Society of Agricultural and Biological Engineers
Additional Links - Incl Trailer Construction and Tractor Restoration 
San Antonio Junior Agriculture Mechanics (JAM) Show
JAM Judging Materials - Check Sheets

Improvements to the 2023 JAM Show

Congratulations to all 2022 JAM and Marketplace Exhibitors

2022 JAM and Marketplace Results (PDF)

The 2022 JAM Awards Presentations 
        INTRODUCTION  (11 Slides)
        DIV 1 - Field Machinery & Equipment  (18 Slides)
        DIV 2- Shop Equipment & Resource Recovery  (18 Slides)
        DIV 3 - Towable Cooking Equip (12 Slides)
        DIV 4- Non Towable Cooking Equip  (15 Slides)
        DIV 5 - Yard & Garden  Equip (13 Slides)
        DIV 6  - Livestock Handling Equip (17 Slides)
        DIV 7 - Livestock & Game Equip (15 Slides)
        DIV 8  - Small Bumper Pull Trailers  (12 Slides)
        DIV 9 -  Over 16 ft & Other Bumper Pull Trailers (17 Slides)
        DIV 10 - Gooseneck Trailers (12 Slides)
        DIV 11 - Gooseneck - Stock, Mult-ibale, 5th Wheel & Other Trailers (15 Slides)       
        DIV 14 & 15 - Early Model Tractors & Later Model Tractors  (23 Slides)
        AWARDS & SHOW CHAMPIONS (24 Slides)

Link to 2021 JAM Photo Gallery. These Photos were developed by Texas Farm and Ranch Photos and provided by JAM Committee. There are approximately 1000 photos in all encompassing JAM and Marketplace. Photos are arranged in
 8 folders for easy selection and viewing. Email, WEB site and Facebook addresses are shown with the Photo Gallery. (Click on Info/Contact at top of Gallery Page) Please inform the three photographers, Edward Speed, Ken Hartlien and Ed Lobash how much you enjoyed their excellent photos.

Link to 2022 JAM Photo Gallery

2022 JAM Donor List  - Please write Thank You letters to our sponsors and donors.
JAM Documents  (PDF)    
JAM Handbooks (Designing and Building)

JAM Instructional Presentations (HTM & PDF) Note:  Some information is out of date. Please confirm current specifications and rules with latest JAM Premium List.

 Trailer Documents  (PDF)
      See Additional Links above for more Trailer Information

  Tractor Documents (PDF)
   JAM 2023 Premium List - Draft

    REVISED and NEW 2023 JAM Tractor Classes Incl
    Revised - 1502 Tractors and Skidsteers
    New - 1503 Yard and Garden Tractors 


See Additional Links above for more Tractor Information

    Research   Dr. Lon R. Shell
    TxState GPS Monument (PID AJ6952)