What is Corn Yield and Why Should You Care?
Ever wondered how much corn you might harvest from your field? That's where corn yield comes into play. Corn yield tells you how many bushels of corn you can expect per acre. It's crucial for farmers, agronomists, and anyone involved in agriculture because higher yields mean better returns. Understanding corn yield helps in making informed decisions about planting and harvesting, ultimately maximizing profits.
How to Calculate Corn Yield
Calculating corn yield is simpler than you might think. Here's the formula:
[\text{Corn Yield (bu/acre)} = \frac{\text{Ear Number} \times \text{Average Row Number} \times \text{Average Kernel Number}}{89.605}]
Where:
- Corn Yield is in bushels per acre.
- Ear Number is the number of harvestable ears in a length of row equal to 1/1000th of an acre.
- Average Row Number is the average number of kernel rows per ear.
- Average Kernel Number is the average number of kernels per row.
You can also switch to metric units if needed:
[\text{Corn Yield (t/ha)} = \frac{\text{Ear Number} \times \text{Average Row Number} \times \text{Average Kernel Number}}{220.462}]
Let's break it down into steps:
- Count Ear Number: Count the number of ears in a section that's 1/1000th of an acre.
- Average Row Number: On every fifth ear, count the rows of kernels to find the average.
- Average Kernel Number: Count the kernels per row to find the average.
- Plug & Chug: Insert these numbers into the formula and calculate.
Calculation Example
Let's do a quick example to get the hang of this.
Step 1: Find the Ear Number. Say you count 30 ears in your sample.
Step 2: Determine the Average Row Number. Let's say you find an average of 16 rows per ear.
Step 3: Determine the Average Kernel Number. Suppose the average number of kernels per row is 14.
Now, plug these values into the formula:
[\text{Corn Yield} = \frac{30 \times 16 \times 14}{89.605}]
Calculations:
[\text{Corn Yield} = \frac{6720}{89.605} \approx 74.99 \text{ bushels per acre}]
So, in this example, your corn yield would be approximately 74.99 bushels per acre.
Practice Example
Try with different values:
- Ear Number: 28
- Average Row Number: 15
- Average Kernel Number: 13
Using the formula:
[\text{Corn Yield} = \frac{28 \times 15 \times 13}{89.605} \approx 61.02 \text{ bushels per acre}]
Key Points to Remember
- The divisor of 89.605 is a yield factor that accounts for the sample size and average kernel weight. For metric, use 220.462 instead.
- Always take multiple samples across your field for a more reliable estimate.
- Actual yield can differ from the estimate due to kernel weight variation, moisture content, and harvest losses.
Pro Tip: Sample from several representative spots in your field rather than a single location. Edge rows and stressed areas can skew results if used alone.