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Alfalfa Information

 

 

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Alfalfa Autotoxicity Reseeding Risk Assessment

  Points Score

1. Amount of previous alfalfa top growth incorporated or left on soil surface

   
Fall cut or grazed 1
0 to 1 ton top growth 3
More than 1 ton top growth 5
2. Disease resistance of the variety to be seeded    
High disease resistance 1
Moderate disease resistance 2
Low disease resistance 3
3. Irrigation or rainfall potential prior to reseeding    
High (greater than 2 inches) 1
Medium (1 to 2 inches) 2
Low (less than 1 inch) 3
4. Soil Type    
Sandy 1
Loamy 2
Clayey 3
5. Tillage prior to reseeding    
Moldboard plow 1
Chisel plow 2
No-till 3
6. Sum of points from questions 1-5    
7. Age of previous alfalfa stand    
Less than 1 year 0
1 to 2 years 0.5
More than 2 years 1
8. Reseeding delay after alfalfa kill/plowdown    
12 months or more 0
6 months 1
2 to 4 weeks 2
Less than 2 weeks 3
Your total score (multiply points from 6, 7 and 8)    

Alfalfa Reseeding Risk

Your score: Autotoxicity risk is: Recommendation:
0 Low Seed
4 to 8 Moderate Caution, potential yield loss
9 to 12 High Warning, yield loss likely
>13 Very High Avoid reseeding, likely stand & yield loss

 

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