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All Journal AGROEKOTEKNOLOGI
Teuku Irmansyah
Universitas Sumatera Utara
Agriculture, Biological Sciences & Forestry

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KOMPOSISI DAN KEPADATAN SEED BANK GULMA PADA BERBAGAI KEDALAMAN TANAH PERTANAMAN PALAWIJA BALAI BENIH INDUK TANJUNG SELAMAT Marshal P. Siahaan; Edison Purba; Teuku Irmansyah
Jurnal Agroekoteknologi Vol 2, No 3 (2014)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (277.41 KB) | DOI: 10.32734/jaet.v2i3.7509

Abstract

Weed seeds in the soil per hectare can reach millions of amount and consists of many differentspecies. The depth of the weed seeds can be used as indicator of competitive level between crop andweeds. The research aims to determine the composition and density of seed bank at various level ofsoil depths at “ Balai Benih Palawija ” Tanjung Selamat North Sumatra. Soil Samples warecollected from four soil depths, namely: 0-5 cm, 5-10 cm, 10-15 cm,15-20 cm using metal pipe withdiameter of 3 cm. The parameters measured were the number of weeds that grow by the depth ofsoil, weed composition (%) per depth of soil and weeds growing time per depth of soil.From resultshowed that the highest density of weed seed bank is found at the depth of 0 – 5 cm. Weedcomposition dominated ( 68.9 % ) by broadleaf weeds. There are differences in the composition anddensity of the real seed bank at different depths in the soil in the field area of Balai Benih IndukTanjung Selamat. Composition and density of weed tends to be lower in deeper soil depths.Keywords: seed bank, depth of soil and crops planting area
Control of Asystasia intrusa (Forssk.) Nees and Eleusine indica (L.) Gaertn. using selected doses of indaziflam on peat and mineral soil Ahmad Rizki Lubis; Edison Purba; Teuku Irmansyah
Jurnal Agroekoteknologi Vol 6, No 4,Okt (2018)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (432.435 KB) | DOI: 10.32734/jaet.v6i4,Okt.19047

Abstract

Pre-emergent weed control is important in weed control strategy. Differences in characteristics of both peat and mineral soil may lead to a different result of weed control, especially pre-emergent herbicide application. Indaziflam, a pre-emergant herbicide, can be used as an alternative herbicide in overcoming weed resistance and tolerant weed.The objective of this study was to determine the efficacy of indaziflam at various doses on  peat and mineral soil using Asystasia intrusa (Forssk.) Nees and Eleusine  indica (L.) Gaertn. as indicator weeds. The experiment was arranged in randomized block design a factorial with four replicates. The first factor was dose of indaziflam (0; 12,5; 25; 37,5; 50; 62,5 and 75 g.ai/ha) and the second factor was type of soil (peat and mineral soil). The results showed that treatments of doses herbicide significantly affected the efficacy of indazfilam on A. intrusa and E. indica on peat and mineral soil. The efficacy was higher on mineral soil compared to peat soil.
Co-Authors Ahmad Rizki Lubis Edison Purba Marshal P. Siahaan