| dc.description.abstract | The carrot plant (Daucus carota L.) is a vegetable plant that provides food in the form of tubers. Carrot plant growth and production can fluctuate due to a lack of absorbed nutrients and suboptimal planting distance. Chicken manure, which is rich in nutrients and decomposes quickly, plays an important role in supporting carrot plant growth. In addition, plant population or planting distance is an important factor that affects plant growth and yield. This study was conducted in Sukajulu Village, Barusjahe District, Karo Regency, North Sumatra. This location is at coordinates 3° 5′ 36.33″ N (LU) and 98° 33′ 12.78″ E (BT) at an altitude of ± 1200 meters above sea level, as measured by the Global Positioning System, from April to August 2025. using a Factorial Randomized Block Design consisting of 2 factors and 3 replications. The first factor was planting distance: 20 x 20 cm, 20 x 15 cm, and 20 x 10 cm. The second factor was chicken manure dosage: 0, 10, 20, and 30 tons/ha. Plant spacing significantly affected plant height, total fresh weight/plot, tuber weight per plant, tuber weight per plot, and harvest index, but had no significant effect on the number of leaves, tuber diameter, and tuber length. A spacing of 20 × 10 cm yielded the best crop production. Chicken manure fertilizer treatment had a significant effect on plant height, tuber diameter, tuber length, total fresh weight per plot, tuber weight per plant, tuber weight per plot, and harvest index, but had no significant effect on the number of leaves. A chicken manure fertilizer dose of 30 tons/ha yielded the best results. The interaction between planting distance and chicken manure fertilizer had no significant effect on any parameters. | en_US |
