Agronomy 212 - Crop Growth, Productivity, and Management

Calculations

The Explanations section contains details about each calculation required in Agronomy 212.

The Practice Calculations section contains practice problems to help you prepare for the exams.

Explanations

1. Adjusted gross value of corn hybrids

2. Interpretation of crop performance test data using statistical analysis

3. Calculate the better buy between two corn hybrids

4. Determine spring freeze risk

5. Yield loss from planting corn after May 1

6. Calculate seeds per foot of row and seeds per acre

7. Determine seeding rate from target plant population and anticipated seed and seedling mortality

8. Corn replant decisions

9. Calculate stand density from stand counts

10. Estimate corn yield in the field

11. Calculation of equidistant row widths based on plant population

12. Application rates of inputs with changes in row width

13. Yield loss from planting oats after April 1 in the central Corn Belt

14. Yield loss for planting soybean after May 1

15. Soybean replant decisions

16. Calculations with pounds of seed per acre, seeding rate, and seed weight

17. Blending two lots of grain to given quality specifications

18. Calculate average weighted corn suitability rating for a field using a soil map

19. Growing degree-day calculation

20. Moisture loss of corn grain from physiological maturity until harvest

21. Equation and information sheet

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Practice Calculations

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Agronomy 212 - Crop Growth, Productivity, and Management
Authored by Dr. Lance R. Gibson
Copyright © 1998-99, 2000-07. Iowa State University. All rights reserved.
Revised: August 17, 2007 .