24 research outputs found

    Analisis Pertumbuhan Kedelai Di Lahan Kering Dengan Aplikasi Bradyrhizobium Japonicum Yang Diinduksi Genistein Dan Pupuk Organik

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    This study aimed to get the information of soybean growth response on inoculation of B. japonicum induced genistein under dry land. The experiment was conducted in farmer fields at Desa Sambirejo, Langkat on June-September 2012. The study used a factorial randomized block design with two factors and three replications. The first factor is genistein induction treatment consisting of without and genistein (50 μM). The second factor is the treatment of B. japonicum and organic fertilizer consisted of without B. japonicum; B. japonicum; B. japonicum + manure 10 t/ha; B. japonicum straw compost + 10 t/ha; B. japonicum + manure 5 t/ha + straw compost 5 t /ha. The variables observed are plant growth rate, plant growth relative and nett assimilation rate. The results showed that treatment of genistein (50 μM) decreased the plant growth rate 5-6 WAP, plant growth relative 5-6 WAP and nett assimilation rate . Treatment of B. japonicum + manure 5 t/ ha + straw compost 5 t/ ha tent to increase plant growth rate, plant growth relative and nett assimilation rate. The interaction between genistein induction and treatment B. japonicum + organic fertilizer tended to decrease plant growth rate, plant growth relative and nett assimilation rate

    Response in Growth of Shallot (Allium Ascalonicum L.) to Application of Mulch and Some Plant Spacing

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    This research has been conducted to obtain a certain application of mulch and some plant spacing which can improve the growth of the shallot. This research had been conducted at experimental field of Faculty of Agriculture University of Sumatera Utara on October to December 2015 using a factorial randomized block design with two factor, i.e. types of mulch (no mulch, straw mulch, silver black plastic mulch) and plant spacing (20 cm x 15 cm, 20 cm x 20 cm,20 cm x 25 cm). Parameter observed were plant height, number of leaves, number of tillers, diameter of the bulbs per sample. The result showed that types of mulch significantly affect of plant height at 2 week after planting (WAP), number of leaves at 2 and 3 WAP in which types of silver black plasctic mulch showed the highest yields. Plant spacing significantly affect the parameters plant height at 3 and 4 WAP. The interaction between types of mulch and plant spacing were not significantly affect on all parameters observed

    Pertumbuhan Dan Produksi Beberapa Varietas Kedelai (Glycine Max L. Merill.) Pada Berbagai Kondisi Air Tanah

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    Growth and Production of Some Soybean Varieties in Some Groundwater Conditions. The aims of this research was to know the growth and production of some soybean varieties in some groundwater conditions. The research was conducted at the Faculty of Agriculture, kassa House, University of Sumatera Utara, Medan, on February to May 2012, using a randomized block design with two factors and three replications. The first factor was the groundwater conditions with 4 level consisted of 50%, 60%, 70% and 80% of field capacity, the second factors was soybean varieties consisted of Anjasmoro, Sinabung, and Willis. The results showed that treatment of several varieties significantly effect on root length at harvest, and the dry weight of 100 seeds. Groundwater conditions treatments significantly effect on root length at harvest, root dry weight, shoot dry weight, dry weight seeds / plant

    Respons Pertumbuhan Dua Bahan Tanam Setek Nilam (Pogostemon Cablin Benth.) Terhadap Pemberian NAA (Napthalene Acetic Acid)

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    Penelitian ini bertujuan untuk mendapatkan respons pertumbuhan dua bahan tanam setek nilam (Pogostemon cablin Benth.) terhadap pemberian NAA (Napthalene Acetic Acid). Penelitian ini dilaksanakan di lahan percobaan Fakultas Pertanian Universitas Sumatera Utara, Medan dari bulan Agustus sampai dengan Oktober 2015, menggunakan Rancangan Acak Kelompok dengan dua faktor perlakuan yaitu bahan tanam setek (setek pucuk dan setek batang) dan konsentrasi NAA (0; 100; 200; dan 300 ppm). Peubah yang diamati yaitu persentase setek hidup, jumlah tunas, berat basah tajuk, dan berat kering tajuk. Hasil penelitian menunjukkan bahwa bahan tanam setek terbaik adalah setek batang pada persentase setek hidup, bobot basah tajuk dan bobot kering tajuk. Konsentrasi NAA terbaik adalah 200 ppm pada persentase setek hidup. Interaksi antara bahan tanam setek dan konsentrasi NAA terbaik pada kombinasi setek batang dengan konsentrasi NAA 200 ppm pada persentase setek hidup
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