A Systematic Review on Effects of Nitrogen Fertilizer Levels on Cabbage (Brassica oleracea var. capitata L.) Production in Ethiopia

Table 1

Growth stages of cabbage.

S/n	Growth stages	Descriptions	References
1	Stage 1: cotyledons (Seed leaves)	No true leaves present	[103–105]
2	Stage 2: seedling	Up to 5 true leaves
3	Stage 3: 6–8 true leaves	Ready for transplanting
4	Stage 4: 9–12 true leaves	Base of stem still visible from above
5	Stage 5: precupping	Approximately 13–19 leaves
6	Stage 6: cupping	Approximately 20–26 leaves
7	Stage 7: early head formation	Head diameter will be approximately 10 cm
8	Stage 8: head fill	Head diameter will be approximately 10–20 cm, and a firm round head is visible within the wrapper leaves
9	Stage 9: mature	Head diameter will be approximately 15–30 cm, and no new visible leaf production will occur after the head has attained maximum hardness and size. The head is reported to be ready for harvest and may split if not harvested in time