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Over the last 50 years, layer hens’ egg production has been influenced by different factors such as genetics (40%), nutrition (20%), disease control (15%), feeding management (20%), and environment (5%) (Figure 1) , and these factors directly or indirectly affect the egg production of layer hens. kunci jawaban tema 8 kelas 6 hal 99 It is commonly believed that egg production is . hotel 99 syariah banjarbaru