How to Test Weight & Moisture Content With a Grain Sample
- 1). Obtain a representative grain sample. Take grain in equal measure from each storage bin and from random locations within each bin. Use a dipping scoop or suction hose for best results, but hand retrieval is also acceptable.
- 2). Mix the aggregate of the retrieved portions completely. Use a grain divider to apportion the aggregate into sizes practical for your scale. Optimal sizes vary by grain and purpose, but 500 to 1,000 grams is normally effective for moisture testing.
- 3). Place the first sample on the grain scale. Calibrate the device to account for the grain container by placing the empty vessel on the scale first to get an accurate reading. Some scales have auto-calibration, which will then discount the container weight for subsequent weight measurements until reset. Wait for a settled digital reading before recording the weight. Repeat for each sample.
- 4). Place the total sample in a continuous flow dryer for best air flow. Set the dryer fans for the moisture content best for the storage health of the grain. For example, storing corn at 15 to 18 percent moisture will require drying at two cubic feet per minute per bushel.
- 5). Weigh the dried grain on the same grain scale as before. Subtract the dry weight from the wet weight, dividing the difference by the wet weight. Multiply this quotient by 100 to arrive at the percentage of moisture in the original samples.
