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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
A. Pieter Lontoh
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Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance

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STUDI EFEKTIVITAS PENCAMPURAN SURFAKTAN DENGAN HERBISIDA UNTUK JALUR TANAMAN KARET BELUM MENGHASILKAN Sulistyono, Eko; Lontoh, A. Pieter; Widagdo, Hady
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 27 No. 1 (1999): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (904.977 KB) | DOI: 10.24831/jai.v27i1.1582

Abstract

The objective of research was to know effective concentration of surfactant and kind of herbicide. Research was conducted at young rubber plantation of PTPN VIII, Sukabumi, West Java. Factorial experiment was arranged in Randomized Block Design with three replication. The first factor was kind of herbicide, glyphosate 2.5 l/ha, sulphosat 1 .5 l/ha and paraquat 2 l/ha. The second factor was surfactant concentration of 0 %, 0.1 % and 0.2 %. Glyphosate that was mixed with 0.2 % of surfactant controlled weed at young rubber plantation effectively. It was showed by low persentage of weed covering. Paraquat without surfactant controlled Borreria alata, and Commelina benghalensis. Glyphosate without surfactant controlled Ottochloa nodosa and Ischaemumti morense.
IDENTIFIKASI GULMA PADA DUA TIPE PERKERASAN TAMAN (KONBLOK DAN GRASBLOK) Nurisjah, Siti; Lontoh, A. Pieter
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 23 No. 1 (1995): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1062.306 KB) | DOI: 10.24831/jai.v23i1.1626

Abstract

Weed constitute one the main problems encountered in urban parks, including those growing on paved park grounds, because in addition to impairing the beauty of the parks they also reduced their function and durability. By weed inventory on park grounds management actions can be planned and conducted Field observation were carried out for two months at the "Monumen Nasional" grounds in Jakarta. Two widely used types of pavement were selected, i.e. conblock and grassblock. The Dominance Value Summed Dominance Ratio were calculated using Tjitro Soedirdjo. Three groups of wide grew in this area, i.e. broad leaves weeds, grasses, and sedges. The species growing on both types of pavement and in both ecological condition are Cyperus rotundus, Eleusine indica, and Euphorbia thymyfolia. Eleven species were identified on shaded and on open conblock respectively. Of these species, nine species grew on both condition, but at varying level of dominance. These are Euphorbia thymifolia, Eleusine indica, Cyperus rotundus, Hedyotis corymbosa, Portulaca oleraceae, Axonopus compressus, Ricahardia brasiliensis, Bacopa procumbens, and Synedrella nodiflora. Eight species were found on shaded grassblock and nine species on open grassblock. Species were found in both condition, i.e. Cyperus rotundus, Eleusine indica, Euphorbia thymyfolia, Chrysopogon aciculatus, and Borreria repens.
Co-Authors Eko Sulistyono Hady Widagdo Siti Nurisjah