The following practice of European potato growers should be of interest and value to American producers:

1. The use of deep-rooting grasses - rye grass, alfalfa, etc.

2. The use of large quantities of animal manures.

3. The use of immature, northern-grown seed.

4. The careful storage of seed stocks in trays.

5. Selection of seed to type and purity of varieties.

6. Close planting.