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"Oil palm is a plant that has a long seed dormancy period. The existence of barrier on the seed coat causesdisturbance on imbibition so the process of germination of oil palm seed is hampered. This study aimed todetermine the effect of interaction between the heat treatment by dry-heat treatment method and the submersionof growth regulator gibberellin on oil palm dormancy breaking. The experiment was conducted using a factorialrandomized block design with 2 factors, i.e. 3 levels of dry-heat treatment duration (40 days, 50 days, 60 days)and 3 levels of gibberellin concentration (0 ppm, 100 ppm, 200 ppm) and repeated 3 times. The result showed thatno interaction between the duration of dry heat treatment and concentration of gibberellin on breaking the oilpalm dormancy. Treatment of dry heat treatment of 50 and 60 days had a good effect on percentage of germination,vigor index, radicle length and plumule length. Concentration of 100 and 200 ppm gibberellin had a good effecton percentage of germination, vigor index, radicle length and plumule length. Fifty days-period of dry heattreatment and concentration of 100 ppm gibberellin gave more effective effect than other treatment.Kelapa sawit merupakan tanaman yang memiliki masa dormansi benih yang panjang. Adanya penghalangkulit benih menyebabkan proses imbibisi menjadi terganggu sehingga proses perkecambahan benih kelapa sawitterhambat. Penelitian ini bertujuan untuk mengetahui pengaruh interaksi antara perlakuan pemanasan denganmetode dry heat treatment dan pemberian zat pengatur tumbuh giberelin terhadap pemecahan dormansi kelapasawit. Percobaan dilakukan menggunakan rancangan acak kelompok faktorial dengan 2 faktor, yaitu 3 taraf lamadry heat treatment (40 hari, 50 hari, 60 hari) dan 3 taraf konsentrasi giberelin (0 ppm, 100 ppm, 200 ppm) yangdiulang sebanyak 3 kali. Hasil penelitian menunjukkan tidak terdapat pengaruh interaksi antara lama dry heattreatment dan konsentrasi giberelin terhadap pemecahan dormansi kelapa sawit. Perlakuan lama dry heat treatment50 dan 60 hari berpengaruh baik pada variabel persentase perkecambahan dan indeks vigor serta panjang radikuladan panjang plumula. Konsentrasi giberelin 100 dan 200 ppm berpengaruh baik pada variabel persentaseperkecambahan, indeks vigor, panjang radikula dan panjang plumula. Lama dry-heat treatment 50 hari dankonsentrasi giberelin 100 ppm memberikan pengaruh paling efektif daripada kombinasi perlakuan lain."

"Polianthes tuberosa L. is a potential flowering plant to be developed in Jatinangor, but, the type of soil inJatinangor belongs to Fluventic Eutrudepts has a lower of pH, medium of available K and potential K. Newstrategy is needed to resolve these problems such as by adding the organic and an-organic fertilizer. This researchwas conducted to determine the effect of the combination organic fertilizer and NPK on soil reaction (pH),available K, Potential K, and fresh weight of tuberose (Polyanthes tuberose L.) on Fluventic Eutrudepts. Theresearch design used was Randomized Block Design (RBD) with ten treatments and three replications, consist of:without organic fertilizer + NPK (control); without organic fertilizer + recommended dosage of NPK;recommended dosage of organic fertilizer + without NPK; ½ recommended dosage of organic fertilizer + ½recommended dosage of NPK; ½ recommended dosage of organic fetilizer + recommended dosage of NPK;recommended dosage of organic fetilizer + ½ recommended dosage of NPK; without organic fertilizer + 1 ½recommended dosage of NPK; 1 ½ recommended dosage of organic fertilizer + without NPK; 1 ½ recommendeddosage of organic fertilizer + ½ recommended dosage of NPK; 1 ½ recommended dosage of organic fertilizer +recommended dosage of NPK. The results show that there were effect of soil reaction (pH), available P, potentialP, and fresh weight of tuberose from combination of organic fetilizer and NPK. Treatments of 1 ½ recommendeddosage of organic fertilizer + without NPK gives the best results of 148,6 g plant-1 with an increase 63,2%compared with no treatment.Sedap malam (Polianthes tuberosa L.) merupakan tanaman hias berbunga indah yang sangat potensialdikembangkam salah satunya di Jatinagor. Tanah di Jatinangor yang termasuk ke dalam sub group FluventicEutrudepts mempunyai reaksi tanah agak masam, K-potensial sedang, K-dd sedang, dan KTK rendah, sehinggaperlu dilakukan upaya untuk meningkatkannya yang salah satunya dengan pemupukan. Percobaan dilakukan untukmengetahui pengaruh pemberian kombinasi pupuk organik dan pupuk NPK terhadap K-potensial, K-dd, KTK danbobot segar tanaman sedap malam (Polyanthes tuberosa L.) pada Fluventic Eutrudepts. Rancangan percobaanyang digunakan adalah Rancangan Acak Kelompok (RAK) faktor tunggal dengan sepuluh perlakuan dan tigaulangan, yaitu terdiri dari : Tanpa pupuk organik + pupuk NPK (kontrol); Tanpa pupuk organik + dosis anjuranNPK; Dosis anjuran pupuk organik + tanpa pupuk NPK; ½ dosis anjuran pupuk organik + ½ dosis anjuran NPK;½ dosis anjuran pupuk organik + dosis anjuran NPK; Dosis anjuran pupuk organik + ½ dosis anjuran NPK; Tanpapupuk organik + 1 ½ dosis anjuran NPK; 1 ½ dosis anjuran pupuk organik + tanpa pupuk NPK; 1 ½ dosis anjuranpupuk organik + ½ dosis anjuran NPK; 1 ½ dosis anjuran pupuk organik + dosis anjuran NPK. Hasil penelitianmenunjukan terdapat pengaruh terhadap K-potensial, K-dd, KTK dan bobot segar tanaman sedap malam akibatpemberian kombinasi pupuk organik dan pupuk NPK. Perlakuan 1 ½ dosis anjuran pupuk organik + tanpa pupukNPK memberikan bobot segar tanaman sedap malam terbaik sebesar 148,6 g tanaman-1 dengan kenaikan bobotsegar 63,2% dibandingkan dengan tanpa perlakuan."