PENGARUH BERBAGAI JENIS PUPUK KANDANG DAN DOSIS PUPUK UREA TERHADAP PERTUMBUHAN DAN PRODUKSI TANAMAN KEDELAI HITAM (GLYCINE SOJA L.)

This study aims to determine the effect of various types of manure and urea fertilizer dosage on growth and production of black soybean (Glycine soja L.). The model used is a factorial Randomized Block Design (RAK) consisting of 2 factors. The first factor is the type of manure consisting of 3 levels, namely: K1 = Chicken manure (75 gr polybag-1), K2 = Goat manure (75 gr polybag-1) and K3 = Cow manure (75 gr polybag-1). The second factor is the dose of Urea fertilizer consisting of 3 levels, namely: U1 = 2.50 gr polybag-1, U2 = 3.75 gr polybag-1 and U3 = 7.50 gr polybag-1. Parameters observed consisted of plant height, number of branches, age of flowering, weight of 100 seeds, root length, number of root nodules. Based on the results of the study, it can be stated that the type of manure had no significant effect on plant height, number of branches, age of flowering, weight of 100 seeds, root length and number of root nodules of black soybean plants. The dose of urea fertilizer had no significant effect on plant height, number of branches and age of flowering, but significantly increased weight of 100 seeds, root length and number of root nodules. The interaction of type of manure and dose of urea fertilizer had no significant effect on all observed parameters

Fitoremediasi Lahan Tercemar Di Kawasan Industri Medan Dengan Tanaman Hias

The development of industrial area in Medan City, North Sumatera impact for the increasing soil polluted by heavy metal at the area. Phytoremediation is an emerging technology for cleaning up contaminated sites, which is inovatif, cost effective, safety and has aesthetic advantages and long term applicability. The important aspect to be noted was the plant should not be used for consumption crops. The goal of our research was to develop the phytoremediation technology by testing different ornamental plant planting under different concentration contaminated soil. So that the plant can use as a phytoremediator agent to recover the land condition at Medan Industrial Area. The experiments included eight ornamental crops such as: Sanseviera trifasciata, Dracaena fragrans, Diffenbachia sp., Phylodendron hederaceam, Agave sp.Codiatum variegatum, :Anthurium crystallium and Chrysalidocarpus lutescens The parameters are biomass production and heavy metal uptake by plant. The result showed that the greatest increase in biomass production contained in Diffenbachia sp. followed by Codiatum variegatum, Chrysalidocarpus lutescens, Sanseviera trifasciata and Dracaena fragrans respectively. Uptake heavy metal is higher at Codiatum variegatum (291 mg/kg) followed by Diffenbachia sp. (246 mg/kg), Chrysalidocarpus lutescens (185 mg/kg), Sanseviera trifasciata (162 mg/kg) and Dracaena fragrans (102 mg/kg)

UJICOBA PERPADUAN MEDIA TANAM COCOPEAT -TOPSOIL DAN DOSIS PUPUK SP-36 TERHADAP PERTUMBUHAN TANAMAN KEDELAI HITAM MALIKA (GLYCINE SOJA. L)

The research aims to test the media plant cocopeat-top soil as well  dose SP-36 fertilizer against growth soya bean black malika (Glycine soja.L ). To know the impact of the growth of oil palm seedlings (Elaesis guineensis Jacq.) in dose using rice husk charcoal biochar on some type of soil in pre- nursery. The research uses the Design Random Factorial  (DRF) consist of 2 factors . The first factor is a mixture of cocopeat - top soil planting media . The second one is SP-36 dose . Based on the results of the study, it can be stated that, cocopeat planting media with topsoil had no significant effect on plant height at 4, 5, 6 and 7 mst, significantly affected the number of branches aged 7 and 8 mst and plant root length, but had no significant effect on flowering age, weight of 100 seeds, and number of root nodules. The dose of SP-36 fertilizer had no significant effect on plant height at the ages of 2, 3, 8, 11, 12 and 13 mst, flowering age, weight of 100 seeds and root length, but had no significant effect on number of branches and number of root nodules. The interaction of cocopeat growing media with topsoil and the dose of SP-36 fertilizer had no significant effect on all observed parameters .The dose of SP-36 fertilizer had no significant effect on plant height at 2, 3, 8 11 and 12 mst, flowering age, weight of 100 seeds and root length, but had no significant effect on number of branches and number of root nodules

DAMPAK PERTUMBUHAN DAN PRODUKSI TANAMAN JAGUNG DALAM PENGGUNAAN DOSIS ABU CANGKANG KELAPA SAWIT DAN DOLOMIT

This research aims to determine the effect of doses of oil palm shell ash and dolomite on the growth and production of maize plants. This study used a factorial randomized block design consisting of two factors. The first factor is the dose of palm shell ash (A) which consists of four levels, namely: (A0) = 0 g (0 tons/ha), (A1) = 30 g/polybag (6 tons/ha), (A2) = 60 g/polybag (12 tonnes/ha) and (A2) = 90 g/polybag (18 tonnes/ha). The second factor was dolomite (D) dosing which consisted of three levels: (D0) = 0 g (0 tons/ha), (D1) = 15 g/polybag (3 tons/ha) and (D2) = 30 g /polybag (6 tonnes/ha). Parameters observed were plant height, number of leaves, stem diameter, leaf area, cob length without cob, cob diameter without cob, cob weight with husk, cob weight without cob and straw weight. The effect of the dose of oil palm shell ash depends on the dose of dolomite which is shown in the diameter of the cobs without husks, in treatment D0 the dose of palm ashes 78.07 g/polybag resulted in a maximum cob diameter without husks of 3.95 cm, treatment D1 increased linearly, treatment D2 the dose of palm shell ash 85.03 g/polybag resulted in a maximum diameter of cobs without husk of 3.98 cm. The largest straw weight was 311.30 g with a dose of shell ash of 56.93 g/polybag