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Effect of Various Levels of NPK Fertilizer on the Yield Attributes of Soybean (Glycine max L.) Varieties Perkasa, Achmad Yozar; Utomo, Utomo; Widiatmoko, Teguh
Journal of Tropical Crop Science Vol 3 No 1 (2016): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Indonesian soybean production can only meet about 30% of national demand. Efforts to increase soybean production include the use of improved seed quality and fertilizer application. The aims of this research were to 1) examine the responses of six genotype soybeans to the application of different doses of NPK fertilizer; 2) determine the seed protein content of the six soybean genotypes following NPK application; 3) determine the interaction between soybean genotypes with NPK doses in affecting growth and yield. This research was conducted under a plastic house at the Faculty of Agriculture, University of Jenderal Soedirman, Central Java, Indonesia. The experiment was arranged in a randomized block design with three replications using six soybean varieties and four levels NPK fertilizer. Soybean varieties tested were “L/S: B6-G1” (V1), “L/S:B6-G3” (V2), “L/S:B6-G4” (V3), “Grobogan” (V4), “Burangrang” (V5), and “Argomulyo” (V6). Four levels NPK fertilizer tested were: without fertilizer (N0), 0.6 g per plant (N1) 1.2 g per plant (N2), and 18.g per plant (N3), or 0, 100, 200 and 300 kg.ha-1. “L/S: B6-G1” had the greatest number of seeds per plant (184) following treatment with 300 kg.ha-1 of NPK. The seed protein content increased with the increase doses of NPK. “Argomulyo” treated with NPK at 300 kg.ha-1 had the highest seed protein content (34.5%). Soybean responses to NPK treatment differed with varieties, particularly in the number of fl owers per plant, number of seeds per plant, grain weight per plant and seed protein levels.

Penggunaan Herbisida untuk Pengendalian Gulma pada Budi Daya Kedelai Jenuh Air di Lahan Pasang Surut Perkasa, Achmad Yozar; Ghulamahdi, Munif; Guntoro, Dwi
Jurnal Penelitian Pertanian Tanaman Pangan Vol 35, No 1 (2016): April 2016
Publisher : Pusat Penelitian dan Pengembangan Tanaman Pangan

Weed is a problem on the soybean saturated culture in tidal swamp land. The objective of this study was to obtain the most effective herbicide for weed control on soybean planted under saturated culture in the tidal swamp land. Research was conducted in tidal swamp land at Banyu Urip village, Tanjung Lago districs, Banyuasin, South Sumatra Province, from July to December 2013, using a randomized block design consisted, of the eight treatments, with three replications. The treatments were: control (P0), manual weeding 4 weeks after planting (P1), paraquat 2 l/ha 4 weeks after planting (P2), glyphosate 3 l/ha 4 after planting (P3), oxyfluorfen 2 l/ha 3 days before planting (P4), oxyfluorfen 3 days before planting 2 l/ha followed application of paraquat 4 weeks after planting 2 l/ha (P5), oxyfluorfen 3 days before planting 2 l/ha followed application of glyphosate 4 weeks after planting 3 l/ha (P6), penoxulam 1 l/ha 2 weeks after planting (P7). Results showed that herbicide paraquat effectively suppressed total dry weight of weeds at 4, 6, and 8 weeks after planting. Cyperus iria was the most dominant weed in the field, with Sum Dominance Ratio 37.7%. The highest soybean productivity was 3.7 t/ha obtained from glyphosate treatment. Pre-emergence herbicide applications should be done prior to soybean planting and the post-emergence herbicide application must be done carefully by using nozzle lid to prevent toxicity to the crop plants.

Studi Identifikasi Stomata pada Kelompok Tanaman C3, C4 dan CAM Achmad Yozar Perkasa; Totong Siswanto; Feni Shintarika; Titistyas Gusti Aji
Jurnal Pertanian Presisi (Journal of Precision Agriculture) Vol 1, No 1 (2017): Jurnal Pertanian Presisi Volume 1, Nomor 1, 2017
Publisher : Universitas Gunadarma

Show Abstract | Download Original | Original Source | Check in Google Scholar

Stomata is a biological components that largely determines the initial synthesis of organic compounds on physiological processes through the plant life cycle. The aim of this research was to study the different of stomata among plants C3, C4 and Crassulacean Acid Metabolism (CAM). This research was conducted at Microtechnique Laboratory of Agronomy and Horticulture Department, Agriculture Faculty, Bogor Agricultural University (IPB). The stomata preparations method by replica or mold method. The parameters that observed are number of stomata (for percentage of open and closed stomata) on the abaxial and adaxial layers of the leaves at magnification (40x10) diameter and stomatal density. The results showed that shading soybean plants had stomata density and number of opened stomata was high compared with soybean without shading C3 plants have high stomatal density and almost every plant species had opened stomata, whereas Crassulacean Acid Metabolism (CAM) plants have lower than others in densities in closed stomata conditions.

FITOTOKSISITAS KINERJA HERBISIDA OKSIFLOURFEN DAN GLIFOSAT PADA KACANG FABA (Vicia faba L.) Achmad Yozar Perkasa
Jurnal Pertanian Presisi (Journal of Precision Agriculture) Vol 4, No 1 (2020): Jurnal Pertanian Presisi
Publisher : Universitas Gunadarma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35760/jpp.2020.v4i1.2655

Penelitian ini dilakukan di Laboratorium Farmakologi Fakultas Pertanian Universitas Thessaly dengan membahas efek herbisida oksifluorfen, glifosat terhadap tanaman kacang faba. Herbisida oksifluorfen mengandung bahan aktif oksifluorfen yang termasuk dalam kelompok kimia eter difenil. Mekanisme kerja herbisida ini adalah menargetkan enzim protoporphyrogen oksidase (Protox) dan protoporphyrin IX (Protogen IX). Pengamatan dilakukan dengan tujuan mengetahui dan mengevaluasi fitotoksisitas aplikasi herbisida terhadap tanaman kacang faba. Hasil penelitian menunjukkan aplikasi herbisida oksifluorfen dan glifosat masing-masing menunjukkan gejala fitotoksisitas secara jelas pada minggu ke-2 setelah aplikasi pada tanaman kacang faba. Hasil ini berhubungan dengan kandungan bahan aktif dan mekanisme mode aksi herbisida tersebut, serta kondisi lingkungan, faktor yang paling berpengaruh adalah suhu.

Comparison of Rooftop Garden Elements in Japan and Indonesia. Study case of Ginza Six Garden, Japan, and PIM 3 Garden, Indonesia Dibyanti Danniswari; Achmad Yozar Perkasa
Journal of Synergy Landscape Vol. 1 No. 1 (2023): Vol. 1 No. 1 August 2023
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/tjsl.v1i1.17604

A rooftop garden is located on the topmost level of a building and provides similar benefits as traditional urban green space while accommodating the limited land issue in cities. The practice of rooftop gardens keeps increasing in urban areas worldwide. There may be differences between rooftop gardens in different countries, be it in the design, the elements, or the activities. This study explores the difference between rooftop gardens in Indonesia and Japan, particularly Jakarta and Tokyo. This study aims to compare the characteristics of rooftop gardens in Jakarta and Tokyo. This study follows a descriptivequalitative approach. The data used in this study is based on visitors’ photos and reviews uploaded to the internet and supported by field observation. PIM 3 Garden’s design concept is based on the trend of citizen culture, which likes to update their activities on social media. In contrast, Ginza Six Garden’s design is based on the Ginza area's history, which combines traditional and modern culture. Since the design concepts are different, the garden elements and the user activities are also different. The main reason for these differences is most likely due to cultural differences. Indonesian people like sharing their activities on social media more than Japanese people. Although the gardens exhibit contrasting designs, elements, and user activities, both seem to accommodate their respective users’ needs and behaviors effectively.

Comparison of Rooftop Garden Elements in Japan and Indonesia. Study case of Ginza Six Garden, Japan, and PIM 3 Garden, Indonesia Dibyanti Danniswari; Achmad Yozar Perkasa
Journal of Synergy Landscape Vol. 3 No. 1 (2023): Vol. 3 No. 1 August 2023
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/tjsl.v1i1.17604

A rooftop garden is located on the topmost level of a building and provides similar benefits as traditional urban green space while accommodating the limited land issue in cities. The practice of rooftop gardens keeps increasing in urban areas worldwide. There may be differences between rooftop gardens in different countries, be it in the design, the elements, or the activities. This study explores the difference between rooftop gardens in Indonesia and Japan, particularly Jakarta and Tokyo. This study aims to compare the characteristics of rooftop gardens in Jakarta and Tokyo. This study follows a descriptivequalitative approach. The data used in this study is based on visitors’ photos and reviews uploaded to the internet and supported by field observation. PIM 3 Garden’s design concept is based on the trend of citizen culture, which likes to update their activities on social media. In contrast, Ginza Six Garden’s design is based on the Ginza area's history, which combines traditional and modern culture. Since the design concepts are different, the garden elements and the user activities are also different. The main reason for these differences is most likely due to cultural differences. Indonesian people like sharing their activities on social media more than Japanese people. Although the gardens exhibit contrasting designs, elements, and user activities, both seem to accommodate their respective users’ needs and behaviors effectively.

EFFECT OF DIFFERENT AB MIX CONCENTRATIONS ON THE GROWTH AND YIELD OF SEVERAL MUSTARD VARIETIES IN AN AEROPONIC SYSTEM Arif Aula Rizki; Budiman; Perkasa, Achmad Yozar; Zatanna Balqis
Journal of Synergy Landscape Vol. 4 No. 2 (2025): Vol. 4 No. 2 Februari 2025
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/tjsl.v4i2.22125

The mustard plant is a vegetable that Indonesian people widely consume. This research analyzes differences in AB mix nutrient concentrations on the growth and yield of several mustard varieties in an aeroponic system. The research was conducted in the Greenhouse Smart Farming Gunadarma University Technopark (UG-TechnoPark) from March to June 2024. This research used the Nested Pattern Randomized Complete Group Design method (Nested Design), which consists of 2 factors. Factor I is the concentration of AB mix nutrients (K) consisting of 2 levels, which are 1200 ppm (K1) and 1800 ppm (K2). Factor II is the type of mustard variety (V) consisting of 4 levels, namely Kumala (V1), Shinta F1 (V2), Kometa (V3), and Tosakan (V4). The results showed that differences in AB mix nutrient concentrations have significantly affected the growth and yield of the mustard plant on some parameter, which is plant height, number of leaves, root length, and dry weight of plant canopy with the highest average values, respectively, which is 35.76 cm, 10.81 leaves, 19.84 cm, and 4.18 grams. The differences in varieties have a significant effect on the growth and yield of mustard plants on the parameters of plant height, number of leaves, leaf length, leaf width, shoot wet weight, shoot dry weight, and root dry weight with the highest average value respectively, which is 39.54 cm, 11.87 leaves, 17.39 cm, 10.85 cm, 69.13 grams, 4.98 grams, and 2.06 grams.

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