PENGARUH KELEMBABAN NISBI UDARA RUANG SIMPAN DAN PERIODE SIMPAN TERHADAP VIABILITAS DAN VIGOR BENIH KAKAO (Theobroma cacao L.) THE EFFECT OF AIR RELATIVE HUMIDITY AND PERIODS OF DISK SPACE TO STORE THE COCOA (Theobroma cacao L.) SEED VIABILITY AND VIGOR Sendika Mentari Arzal1), Syamsuddin2), Said Imran2) 1) Mahasiswa Program Studi Agroteknologi Fakultas Pertanian Unsyiah 2) Staf Pengajar Program Studi Agroteknologi Fakultas Pertanian Unsyiah 3) Staf Pengajar Program Studi Agroteknologi Fakultas Pertanian Unsyiah ABSTRACT This study aims to determine the effect of air relative humidity and periods of disk space to store the cocoa seed viability and vigor . Besides, in this study also wants to know whether there is an interaction between the air relative humidity and periods of disk space to store the cocoa seed viability and vigor which lasts from March to May 2013 . This study used a factorial completely randomized design ( CRD ) . Relative humidity of air space saving as the first factor consists of 5 levels ie 20 % , 40 % , 60 % , 80 % and 100 % . Save period as the second factor consists of 5 levels ie 1 week , 2 weeks , 3 weeks , 4 weeks and 5 weeks . Each treatment was repeated 3 times . The results showed that the relative humidity of air space saving very significant effect on the viability and seed vigor based on benchmarks cocoa seed moisture content ( KAB ) , the maximum growth potential ( PTM ) , germination ( DB ) , growth velocity ( KCT ) , simultaneity grow ( KST ) , vigor index ( IV ) , the time required to reach 50 % of the total relative germination ( T50 ) and normal seedling dry weight ( BKKN ) . While the treatment period save very significant effect on the viability and seed vigor based on benchmarks cocoa seed moisture content ( KAB ) , the maximum growth potential ( PTM ) , germination ( DB ) , growth velocity ( KCT ) , simultaneity grow ( KST ) , vigor index ( IV ) , the time required to reach 50 % of the total relative germination ( T50 ) and normal seedling dry weight ( BKKN ) . This study also showed a highly significant interaction on benchmarks maximum growth potential ( PTM ) , germination ( DB ) , growth velocity ( KCT ) , simultaneity grow ( KST ) , vigor index ( IV ) , the time required to reach 50 % of the total relative germination ( T50 ) and normal seedling dry weight ( BKKN ) . Keyword: the effect of air relative humidity, periods of disk space, viability, vigor, kakao.