A planting plan becomes more useful when it learns from the harvest.
Garden plans often focus on what goes into the soil: seed packets, spacing, sowing dates, compost and water. Yield records add the other half of the picture. Instead of relying on memory, you can see which crops produced enough to justify their bed space, which varieties were disappointing, and whether changes in timing or growing method improved the result.
Weight is usually the most useful comparison for tomatoes, beans, potatoes, courgettes and other crops harvested in variable sizes. Item count can be more useful for pumpkins, cabbages, lettuces or individual fruit. The tracker accepts either measure because the best record depends on the crop. Recording both is even better when it is practical.
Do not treat one season as a scientific trial. Weather, pest pressure, soil condition, plant losses and variety choice can all change from year to year. A harvest log becomes stronger as several seasons accumulate and you combine it with notes from your Garden Journal.