Step 1:   Choose a representative 2-square-foot area in the field.

Step 2:   Determine the most mature stem in the 2-square-foot sampling area using the criteria shown in the table at right.

Step 3:   Measure the length of the tallest stem in the 2-square-foot area. Measure it from the soil surface (next to plant crown) to the tip of the stem (NOT to the tip of the highest leaf blade). Straighten the stem for an accurate measure of its length. The tallest stem may not be the most mature stem.

Step 4:   Based on the most mature stem and length of the tallest stem, use the chart at the right to determine estimated NDF content of the standing alfalfa forage.

Step 5:   Repeat steps 1 to 4 in four or five representative areas across the field. Sample more times for fields larger than 30 acres.