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Maize is the second most important commodity after rice. The existence of dry land, especially in East Kalimantan, is a potential alternative in developing maize cultivation. But it is constrained by the dry land’s low fertility. The aim of this study was to identify the effect of soil ameliorant and biofertilizer combination in increasing maize productivity. This study was conducted in Dusun Pulau Mas, Buana Jaya Village, District of Tenggarong Seberang, Kutai Kartanegara Regency during April – August 2020 by using Maize Var. Nakula Sadewa 29. The experiment was designed by using Randomized Block Design (RBD) with two factors and 4 replications, consisted by 5 level of soil amelioration (DH = 1000 kg compost/ha, 500 kg dolomite/ha, 10 kg biofertilizer/ha, 5 kg NPK/ha; DNH = 1000 kg compost/ha, 500 kg dolomite/ha, 5 kg NPK/ha; PH = 1000 kg compost/ha, 10 kg procal/ha, 10 kg biofertilizer/ha, 5 kg NPK/ha; PNH = 1000 kg compost/ha, 10 kg procal/ha, 5 kg NPK/ha; KH = 1000 kg compost/ha, 10 kg biofertilizer/ha, 5 kg NPK/ha) and 2 level of planting system (single row: 70x20 cm and double row: 80x20x20 cm). The result shows the highest productivity of 9.5 tons on treatment PH with double planting space. The addition of soil ameliorant and biofertilizer have positive effects in increasing maize productivity in the dry land. Keywords: acid land, maize NaSa 29, soil ameliorant Abstrak Jagung menjadi komoditas pangan nomor dua setelah padi. Ketersediaan lahan kering yang cukup memadai menjadi alternatif perluasan pengembangan jagung terutama di Kalimantan Timur namun terkendala rendahnya produktivitas lahan kering masam. Tujuan dari kajian ini adalah mengidentifikasi pengaruh kombinasi pembenah tanah dan pupuk hayati untuk meningkatkan produktivitas jagung di lahan kering masam. Kajian budidaya jagung di lahan masam dilaksanakan di Dusun Pulau Mas Desa Buana Jaya, Separi III Kec. Tenggarong Seberang Kab. Kukar pada bulan April – Agustus 2020 dengan menggunakan varietas jagung hibrida Nakula Sadewa 29. Rancangan menggunakan RAK 2 faktor dengan 4 ulangan, yang terdiri atas 5 taraf perbaikan kesuburan tanah (DH = 1.000 kg kompos/ha, 500 kg dolomit/ha, 10 kg hayati/ha, 5 kg NPK mutiara/ha; DNH = 1.000 kg kompos/ha, 500 kg dolomit/ha, 5 kg NPK mutiara/ha; PH = 1.000 kg kompos/ha, 10 kg procal/ha, 10 kg hayati/ha, 5 kg NPK mutiara/ha; PNH = 1.000 kg kompos/ha, 10 kg procal/ha, 5 kg NPK mutiara/ha; KH = 1.000 kg kompos/ha, 10 kg hayati/ha, 5 kg NPK mutiara/ha) dan 2 taraf jarak tanam (tunggal: 70x20 cm dan ganda: 80x20x20 cm). Hasil menunjukkan bahwa produktivitas tertinggi yaitu 9,5 ton pipilan kering/ha pada perlakuan PH dengan sistem tanam ganda. Pemberian kombinasi pembenah tanah dan pupuk hayati memberikan pengaruh positif terhadap produktivitas jagung di lahan masam. Kata kunci: lahan masam, jagung NaSa 29, pembenah tanah 

PENGARUH PEMBENAH TANAH DAN PUPUK HAYATI TERHADAP PENINGKATAN PRODUKTIVITAS JAGUNG HIBRIDA DI KALIMANTAN TIMUR