Kampar regency is assumed to have a palm tree land as big as 14 thousand ha with more than 25-years-old plants. The no longer productive age of those plants should have gone through the rejuvenation process or known as replanting oil-palm potential (ROPP). In order to simplify ROPP inventory, research can be done using remote sensing technology and field verification to determine the oil palm age. The research result shows 647, 290 ha oil palm field and 426, 982 ha non-oil palm field. Besides that, it is known the width of private companies-owned oil palm field is 97, 653 ha, and smallholder farmers-owned field with plant age < 25 years (SW2 = 66, 866 ha), and > 25 years (SW3 = 482, 770 ha). The potential smallholder farmers-owned width of oil palm replanting (ROPP) at Kampar regency is at around 7.05 thousand hectares.

Moringa oleifera Lam. is the Moringaceae family that is becoming popular in Indonesia as a food, medicine, and cosmetics source. Developing moringa plants in the community is difficult because there is no source of moringa seeds. However, the moringa mother tree from population selection has high productivity, known genetics, and is pests and diseases free. Therefore, it is necessary to identify and characterize the moringa plant population. The research has conducted in Selengan Village, North Lombok, West Nusa Tenggara Province, in June 2021. The study aims to determine the selected mother tree, observe morphological characters, and calculate seed production per year. First, a survey method explored selected moringa mother trees. Then, observations of morphological characters were on quantitative and qualitative characters. Finally, potential seed production had carried out to estimate the seed production in population per year. The results showed that there have 38 mother trees that have high-yielding seed production. Furthermore, because the moringa population was from one seed source, the morphological population of the mother tree has the same characteristics. Therefore, the potential for moringa seed production was around 624,034 moringa seeds per year.

Peat in coastal areas has different characteristics compared to peat in inland areas because coastal peat usually has high DHL, pyrite, marine sandy substratum, and maturity which is generally classified as hemic to sapric. These variants in soil characteristics drive peculiarity in its management. For this reason, a more detailed information about the characteristics is needed to allow sustainable management and utilization. A total of 78 peat soil samples from 20 peat soil profiles taken over west coast of Sumatra was studied and analyzed for their physical and chemical properties. Field observations were made using a peat auger to determine thickness and maturity, substratum, presence of pyrite, and others. Results showed that peat thickness varied from shallow (50-100 cm), medium (100-200 cm), to very deep (>700 cm); peat situated closer to the coast generally has shallow peat depth. Peat soil in coastal areas contained a mineral soil substrate with a sand content of >70%. It was found that soil had a hemic maturity level and a very acidic to acidic pH value (pH 2.5-5.4). The P2O5 content extracted by 25% HCl varied from low to moderate, while K2O content of 25% HCl extraction was very low. Cations K, Na, and Ca were very low to very high, while Mg spanned from very low to high. Based on its thickness, 25% of peatland were not suitable (Nrc) for general agriculture uses because of >300 cm thickness. Therefore, it is necessary to improve soil fertility and water management in several places.

To fulfill market demand and prevent its extinction, sago palm plantation need to be developed by planting elite varieties in other areas. For these reasons the large number of seedling is needed. In this study we developed the method for an ex vitro propagation technique combining with maintaining samples freshness for several days. Young suckers were treated using aquades, Na-hypochlorite or alcohol. After 3 days, suckers were sterilized, followed by dipping in vitamin solutions and IBA for an hour. The shoots were then planted in the mixture of soil and organic fertilizer. The results of our study showed that young sucker treated with alcohol 96% was the best treatment for maintaining the freshness of samples upto 3 days. During 20 weeks of culture, the optimum root induction was achieved after applying IBA 50 mg/L. Our result may serve as a base for mass propagation of sago palm.Keywords: Ex vitro, IBA, root induction, sample freshness, young suckers ABSTRAKUntuk memenuhi kebutuhan pasar serta mencegah kepunahannya, perkebunan sagu perlu dikembangkan dengan menanam tanaman sagu berkualitas di daerah lain yang sesuai. Untuk mendukung program ini, bibit sagu dibutuhkan dalam jumlah yang sangat besar. Dalam studi ini kami mengembangkan perbanyakan bibit sagu dengan teknik ex vitro yang dikombinasikan dengan metode untuk menjaga kesegaran sampel selama beberapa hari. Anakan muda sagu diberi perlakuan dengan aquades, Na-hipoklorit atau alkohol. Setelah disimpan selama 3 hari, anakan yang terlihat tetap segar dilanjutkan ke tahap sterilisasi, dan selanjutnya direndam dalam larutan campuran vitamin dan IBA selama 1 jam. Akhirnya anakan muda ditanam dalam media campuran tanah dan pupuk kandang. Hasil penelitian ini menunjukkan bahwa perlakuan dengan alkohol 96% adalah yang terbaik untuk menjaga kondisi anakan tetap segar setelah disimpan hingga 3 hari. Selanjutnya setelah dikultur selama 20 minggu, induksi akar yang optimal dapat dicapai dari perlakuan IBA 50 mg/L. Hasil yang kami peroleh dapat menjadi acuan dalam perbanyakan bibit sagu secara masal.Kata kunci: Ex vitro, IBA, induksi akar, kesegaran sampel, anakan muda