Crop & Soil Management 2009–2010 - Corn Management

Crop & Soil Management 2009–2010
Section 4, Corn

Tables

Table 1.4-1. Approximate relative maturity rating and growing degree days available for Pennsylvania corn maturity zones.
Table 1.4-2. Example of adjusting plant nutrient recommendations for manure applications.
Table 1.4-3. Example of adjusting plant nutrient recommendations for previous crop.
Table 1.4-4. Nitrogen recommendation worksheet to be used for making PSNT-based sidedress N recommendations in Pennsylvania.
Table 1.4-5. Effects of method and time of nitrogen application (Penn State).
Table 1.4-6. Corn yield response from starter fertilizer, three-year data (Penn State).
Table 1.4-7. Average yields of corn as affected by crop rotation over a five-year period (1990–95) at Rock Springs.
Table 1.4-8. Estimated grain yields for various planting dates and population rates.
Table 1.4-8A. Estimated grain yields for various planting dates and population rates.
Table 1.4-9. Corn planting and plant population guide.
Table 1.4-10. Length of row equal to 1/1,000 acre.
Table 1.4-11. Whole plant moisture relative to stage of kernel development.
Table 1.4-12. Kernel/ear moisture relationship.
Table 1.4-13. Weight of corn (shelled and ear) to equal 56 lb (1 bu) shelled corn at 15.5 percent moisture.
Table 1.4-14. Average field losses due to delayed harvest from tests in Illinois, Indiana, Iowa, and Nebraska over several seasons.

Figures

Figure 1.4-1. Pennsylvania corn maturity zones and the approximate relative maturity (RM) of adapted hybrids.
Figure 1.4-2. Effect of delayed nitrogen application on nitrogen vulnerability.
Figure 1.4-3. Kernel milk line showing separation between firm starch and milky starch.

Corn Management

Corn
Types
- Yellow Dent Corn
- Brown Midrib Corn
Varieties
Nutritional Requirements
- Basic Fertility Management
  - Adjusting Recommendations
- Lime
- Presidedress Soil Nitrogen Test
  - Procedure
  - PSNT Recommendation Guidelines
- Applying Fertilizers
  - Potash (K₂O)
  - Phosphate (P₂O₅)
  - Nitrogen (N)
  - Nitrogen and Soil pH
  - Nitrate Toxicity
- Using a Starter Fertilizer
  - Placement
  - Rates
  - Materials
Establishment
Growth and Development
- Crop Development
- Weather Impacts
  - Frosted Corn
  - Drought-Stressed Corn
Harvesting
- Corn silage
  - Ensiled high-moisture corn
  - Ear and dry shelled corn
- Test weight