| Popis: |
A simple, accurate and reasonably fast hand-fed lettuce (Latuca sativa L.) seedling* transplanter has been designed. Planting rates of up to 9500 plants per hour were achieved in the laboratory. A 3 percent average planting error was demonstrated in the field for a 2000 plant/h planting rate and a 30 cm plant spacing. Some seedling soil blocks broke during planting because of inadequate root development and soil compaction. However, with well-developed seedlings, planting was trouble free. Harvest results indicated normal growth, as compared with results from previous tests with hand-planted lettuce. |
