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All Journal Agrotrop : Journal on Agriculture Science JTSL (Jurnal Tanah dan Sumberdaya Lahan) Jurnal Ilmu-Ilmu Pertanian Indonesia Jurnal Solum Gontor AGROTECH Science Journal EnviroScienteae Agritrop : Jurnal Ilmu-Ilmu Pertanian (Journal of Agricultural Science) AGROSCIENCE Jurnal Agrium AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment)
Hermansah Hermansah
Agriculture Faculty, Andalas University. Indonesia
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Environmental Science

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PENGARUH PENCAMPURAN LAPISAN OLAH DAN LAPISAN TAPAK BAJAK TERHADAP KARAKTERISTIK SIFAT KIMIA TANAH SAWAH Rafdea Syafitri; H Hermansah; Y Yulnafatmawita
Jurnal Tanah dan Sumberdaya Lahan Vol. 7 No. 2 (2020)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (256.229 KB) | DOI: 10.21776/ub.jtsl.2020.007.2.21

Abstract

The increasing of Indonesian population has led to a decrease in the area of rice fields in Indonesia. Therefore, it is needed to increase the fertility and the productivity of paddy soil. Since 1984, several attempts have been made to increase the productivity of paddy soils through the green revolution program, but this has had a negative effect on the fertility of paddy soils. The exploitation of paddy soil layers which has been increasing for years has decreased paddy soil. Other aspects of paddy soil management need to be done; one of them is a mixture of top soil layer with plow pan layer. The mixture of top soil layer with the plow pan layer is expected to improve the soil fertility. This research was conducted with the aim to study the effect of the top soil layer and plow pan layer on the chemical properties of paddy soil. This study used a completely randomized design with five treatments of mixing paddy soil layers and three replications. The treatments were A1 = 100% top soil layer, A2 = 75% top soil layer + 25% plow pan layer, A3 = 50% top soil layer + 50% plow pan layer, A4 = 25% top soil layer + 75% plow pan layer, and A5 = 100% plow pan layer. The results showed that the A2 treatment gave changes in optimal soil chemical properties. The A2 treatment decreased EH value to 133 mV, increased pH to 6.08, organic-C 2.22%, total N 0.30%, available P 27.94%, CEC 38.50%, exchangeable Ca 0.88 me 100g-1, exchangeable Mg 0.37%, exchangeable K 0.94% and exchangeable Nadd 0.17%.
Investigating the Effect of Using Glyphosate on Microbial Soil in Sweet Corn Cultivation Nguyen Thi Hong Tho; Agustian Agustian; Hermansah Hermansah
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 7 No. 2 (2023)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (693.47 KB) | DOI: 10.29165/ajarcde.v7i2.270

Abstract

Glyphosate affects the activity of certain soil microbial. Depending on the soil type and concentration, Glyphosate will have different effects. The study determined the effect of Glyphosate on the microbial population and the effect of its different volumes on β-Glucosidase activity on Ultisol used in corn cultivation. The study used a completely randomized design (CRD), two factors with three replicates. The first factor was liming. The second element was Glyphosate at a dosage of 0, 5, 6, 7 L/ha. The study was conducted at the Department of Greenhouse Agriculture, Andalas University, from July to November 2022. The results showed that although there was no interaction and statistically significant between treatments for the total bacteria population. However, the treatment used lime and low volumes of Glyphosate gave the total bacteria population high density. β-Glucosidase, an enzyme produced from a specific type of bacteria in soil, decreased activity while combining lime treatment and Glyphosate, especially from the dosage at 6 L/ha, and had a statistically significant interaction between lime factor and herbicide after the second spray (p<0.05). In conclusion, Glyphosate and lime can alter and reduce microbial soil activity and number, particularly at high 6 and 7 L/ha volumes.
EFFECT OF PLASTIC MULCHING AND PESTICIDE APPLICATION ON ACTIVE AND STABLE CARBON IN VOLCANIC SOILS, WEST SUMATRA Maulana Kamil; Annisa Rachim; Irwin Mirza Umami; Khairun Nisa Kamarudin; Hermansah Hermansah
Jurnal Ilmu-Ilmu Pertanian Indonesia Vol 25 No 1 (2023)
Publisher : BPFP Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jipi.25.1.59-65

Abstract

Agricultural intensification plays an important role in sustaining productivity. Plastic mulching and the application of pesticides in crop cultivation have become inevitable to achieve high yield production. This study was aimed to determine the effect of plastic mulching and pesticide applications on carbon (C) fractions. The field experiment was designed using a completely randomized design with two factors consisting of plastic mulching and the application of pesticide at two levels (with and without) at each treatment. All the treatments were prepared for three replications. The soil carbon fractions data collected includes active C and humic acid as stable C fractions. The findings of this research showed that both active and stable C fractions were not significantly influenced by plastic mulching and pesticide applications. The active and stable C fractions were ranging from 1.40 to 1.42 g/kg and from 193.3 to 220 g/kg, respectively. These results might be attributed to the period of the study. The duration of this study might be not sufficient to capture any potential long-term changes in soil C fractions induced by the treatments. Thus, further research should consider extending the experiment duration to assess the long-term effects of the agricultural practices to C fractions.
SPATIAL DISTRIBUTION   OF SILICON AVAILABILITY IN THE HIGHLAND PADDY FIELDS OF WEST SUMATERA, INDONESIA Adilla Sy Mahdiyah; Hermansah; Gusnidar; Maulana Insanul Kamil
Jurnal Ilmu-Ilmu Pertanian Indonesia Vol 26 No 1 (2024)
Publisher : BPFP Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jipi.26.1.33-39

Abstract

Silica (Si) is a functional element in rice fields that is rarely studied, especially in Solok Regency. Intensive management without a fallow period causes silica to be transported out through high uptake by rice plants. This research aims to determine the distribution of available Si in the highland rice fields in Gunung Talang District, Solok Regency, West Sumatra. The research was carried out using a survey method. Soil samples were taken following the topo-sequence of the area of 600–1,100 meters above the sea level, which consists of 3 groups of rice fields based on height differences, namely the lower, middle, and upper fields. These rice fields have two types of straw management, namely burning and immersing. The research showed that the available Si content was 10.48–293.66 mg/kg  with an average of 133.34 mg/kg. The available Si content is higher in the upper paddy fields compared to the lower and middle paddy fields. Based on differences in straw management, the available Si content is lower in fields with straw buried compared to burned straw. The application of Si fertilizer is highly recommended to obtain the available Si content in the soil.  
Co-Authors . Gusmini Adilla Sy Mahdiyah Agustian Agustian Annisa Rachim Annisa Rachim Auzar Syarif Burhanudin Burhanudin Dina Oktaviani Enita Enita Ermadani Ermadani Eti Farda Husin Gusnidar, G Irwin Mirza Umami Irwin Mirza Umami Khairun Nisa Kamarudin Khairun Nisa Kamarudin Maulana Insanul Kamil Maulana Insanul Kamil Maulana Kamil Nguyen Thi Hong Tho Nurhajati Hakim PANJI ROMADHAN Rafdea Syafitri Sismiyanti Sismiyanti Sri Muhara Teguh Budi Prasetyo Yulnafatmawita Yulnafatmawita