<p class="8AbstrakBahasaIndonesia">Rendahnya produktivitas kopi Indonesia di akibatkan oleh kebun pertanaman yang telah tua serta belum dimanfaatkannya bahan tanam unggul, untuk itu perlu dilakukan kajian tentang penggunaan bibit unggul yang yang relatif mudah dan praktis yaitu dengan cara stek daun.Penelitian tentang Studi Sumber Stek yang berbeda dan pemberian Rootone F Terhadap Tingkat keberhasilan Stek Daun Kopi (Coffea Canephora Pierreex Froehner) telah dilaksanakan di kebun percobaan Universitas Medan Area yang dimulai dari bulan Februari sampai dengan april 2013. Tujuan penelitian ini adalah untuk mengetahui sumber stek daun yang berbeda dan Konsentrasi zat pengatur tumbuh terbaik untuk pertumbuhan setek daun kopi. Percobaan ini menggunakan Rancangan Acak Lengkap (RAL) dengan 12 taraf perlakuan dengan 3 ulangan. Data hasil percobaan ini dianalisis secara statistika dengan uji F pada taraf nyata 5% dan F perlakuan yang berbeda nyata dilanjutkan dengan uji lanjutan jarak Duntcunt ada taraf nyata 5%. Hasil penelitian ini menunjukkan sumbertek yang berbeda memberikan pengaruh yang nyata untuk parameter persentase tumbuh dan persentase hidup, sumber stek bagian ujung lebih baik di banding dengan sumber stek bagian tengah dan bagian pangkal untuk parameter pertentase stek hidup, sedangkan untuk parameter persentase tumbuh menunjukan sumber stek bagian pangkal lebih baik dibanding dengan sumber stek bagian ujung dan bagian tengah.</p>
Dendrobium sp is a type of orchid that is currently very popularly traded because it has a variety of flower types, but the growth rate is slow. Vitamin B1 (Thiamin) is a micro nutrient that is able to accelerate the division of new cells in the tissue so that it can accelerate the growth of plant vegetative organs. Atonic is a chemical that can stimulate the biochemical and physiological processes of plants, so that atonics is a growth regulator. Atonic is usually used to stimulate the growth of plant roots against nutrients, increase leaf absorption, flower discharge, fruit formation, and increase the number and weight of fruit. The purpose of this study is the Stimulation of Growth and Development of Planlet Orchid (Dendrobium sp) in the Acclimatization Stage by Provision of Vitamin B1 and Atonik.This research was conducted experimentally using a completely randomized design (CRD) with 2 factors, namely the concentration of Vitamin B1 (Thiamin) consisting of 4 treatment groups and Atonic consisting of 4 treatments. Vitamin B1 (0 ml / l, 1.5 ml / l, 3 ml / l, 4.5 ml / l) and Atonik (0 ml / l, 1 ml / l, 2 ml / l, 3 ml / l) and each treatment was repeated 2 times so that 128 plants could each treatment consisting of 4 plants with 4 sample plants. Spraying is done once a week. The parameters observed were percentage growth, plant height, stem diameter, number of leaves, primary root length and number of roots and measured at 2MST.Based on the results of research on Dendrobium sp. Can be concluded 1) Provision of Vitamin B1 significantly affect the growth of orchid plant height (Dendrobium sp). 2) The giving of Atonik significantly influences the growth of the number of leaves, root length and number of roots of orchid plants (Dendrobium sp). 3) Provision of Vitamin B1 and Atonik simultaneously can accelerate to overcome plant height, number of leaves and the budding of orchid plant roots (Dendrobium sp).
Research on The Effectivity Of Castration And Seed Sources To The Growth And Production Of Strawberry Crops (Fragaria x ananassa var duchesne). Objectives to determine the effect of castration and seed sources in encouraging the growth and production of strawberry plants (Fragaria x ananassa var duchesne). The research was conducted at Fruit Plant Experiment Center of Berastagi Fruit Experiment Garden, Medan Berastagi road 60 kilometer, Karo district with ± 1200 meters above sea level. The study was conducted from May 2014 until August 2014, using Factorial Randomized Block Design (RAK), with four replications, 6 combinations to obtain 24 plant plots from all combinations and replications. The first factor to be tested was castration ie K0 = without castration, K1 = using castration. The second factor that tested is Source of seed of strawberry plant that is S1 = source of seed from seedling, S2 = source of seed from Sulur in book 1, S3 = source of seed from Sulur in book 2. The results showed that the castration was very significant in the observation of fruit weight of cultivation with 13.11 gram (K1S1) weight and no significant effect on production per plot, but the average yield of fruit weight per plot showed a high yield of 176.13 grams (K1S1). In general, this study showed castration treatment had an effect in increasing strawberry fruit weight to all sources of seeds
Improvement efforts to obtain high yield and adaptive varieties can be carried out through plant breeding programs. The success of irradiation in increasing population diversity is determined by plant radiosensitivity. Radiosensitivity aimed to determine a dose that caused plant death (lethal dose) or growth inhibition of 50% of the irradiated population (LD-50). The seeds of rice CV. Sidikalang was irradiated with gamma rays at doses of 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100 and 1200 Gy. The results showed that the value of Lethal Dose (LD-50) on the percentage of germination is 586.446 Gy and the gamma ray irradiation treatment gave different responses to plant height.
This study aims to determine the amount of income from lowland rice farming, determine the factors that affect the income of lowland rice farming and determine strategies for increasing the income of lowland rice farming in Tebing Tinggi City. The study was conducted in Tebing Tinggi City, North Sumatra Province which was carried out for 3 months, namely April - June 2017. The research approach was conducted descriptively through case studies. Data collection techniques carried out by observation, interviews, and filling out questionnaires. Data analysis methods used include R / C ratio analysis, regression analysis and Strengths, Weaknesses, Opportunities and Threats (SWOT) analysis. The results showed that lowland rice farming in Tebing Tinggi City was profitable with an R / C ratio of 2.54, the factors of production significantly affected the income of lowland rice farming in Tebing Tinggi City, and strategies in increasing the income of lowland rice farming in Tebing Tinggi City i.e. utilizing farmers' motivation to activate farmers' institutions in managing their farming, utilizing local government support and availability of vacant land to increase land area and access to capital, utilizing farmers' experience and using superior seeds to increase production and utilizing information and marketing technology that is easy to maintain economic value and meet consumer needs
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