Arabica coffee also known as mountain coffee is one of the plantation crops that has great potential to be developed on agribusiness scale in Solok Regency due to its suitability on agro-climate region for growth and also may provide great expectation of financial benefit for farmers as well as for economical aspect for the region. A study of soil physical properties under different age of arabica coffee was conducted from April to November 2020 in Lembah Gumanti, Pantai Cermin and Danau Kembar subdistricts, Solok Regency, West Sumatra. The aim of this study was to analyse some of soil organic matter, particle size distribution (soil texture), bulk density, total porosity, and aggregate stability index on different ages from five locations of arabica coffee plantation. Results showed that the soil physical properties of the arabica coffee of 1, 4, 8, and 13 years old, and secondary forest has been changed. The only the soil permeability of the 20-40 cm depth showed significantly different. These may be due to the difference in organic matter application and management in different age of arabica coffee plantation.
This research on the escalation of nutrient status aims to determine the effect of giving Terra Preta Biochar Padi (Tetadi) on ex-gold mining land to P-available land in Nagari Padang Sibusuk Sijunjung Regency, West Sumatra. Soil samples were taken from the former gold mining soil with a depth of 0-20 cm randomly. This research was conducted using a completely randomized design with 6 treatments and 4 replications consisting of control (A), Tetadi 10 tons / ha (B), Tetadi 15 tons / ha (C), Tetadi 20 tons / ha (D), Tetadi 25 tonnes / ha (E), and Tetadi 30 tonnes / ha. The results showed that giving Terra Preta Biochar Rice to ex-gold mining land could increase the highest available P of soil in the treatment of rice Terra Preta Biochar 30 tonnes / ha with the results of the 5% DMRT statistical test very significantly different from the control treatment and 10 tonnes / ha and 15 tonnes / ha. Soil pH also showed the highest increase in the treatment of 30 tonnes / ha with a pH value of H2O of 5.7 and followed by a pH of KCl with a value of 4.6 and statistical test results showed that the treatment of 30 tonnes / ha was also very significantly different from control and treatment.
The process of physical and chemical properties of the former gold mining soil which is caused by the transformation of different land conditions in natural rice fields, reclaimed rice fields, and mine fields. This study aims to determine the differences in the characteristics of the former gold mining soil in natural rice fields, reclaimed rice fields and mining fields in Sijunjung Regency. There were three sampling locations with three sample points each and the samples were analyzed physically and chemically. Results of this study showed that natural paddy soil has optimal conditions for the growth of rice plants followed by reclaimed lowland soil and the worst was in mining paddy soil based on soil physical and chemical properties. The difference in soil physical properties in the form of natural paddy soil texture was smoother compared to land conditions in reclaimed rice fields and mining rice fields. This was due to intensive inundation processes, which created a plough tread layer, low volume weight accompanied by a moderate total pore space. The difference in chemical properties was in the stable pH of natural paddy soil due to inundation and high organic carbon accompanied by rice reclamation and very low organic carbon in mining soils, which would affect the growth of rice plant.
Indonesia is necessary to develop an increase in soil productivity. The decline in soil productivity for agriculture can be caused by several factors, namely land conversion to a decrease in groundwater quantity. The actual pattern of providing irrigation water with the application of dielectric sensor technology is carried out in soil cultivation to create efficiency in providing irrigation water. This research was conducted using a single factor experimental method with repeated measurements on three types of land use, such as land without vegetation, soil with tomato cultivation, and soil with grass. Measurements were carried out using an automated application of soil moisture monitoring based on dielectric technology with two measuring periods. Each measuring period consists of two weeks or fourteen days. Soil sample analysis was carried out at the Bengkulu University soil laboratory. The results of the observations were analyzed using variance (ANOVA) on the 5% F test table, the LSD test was carried out at the 5% level on data that had a significant effect. The results showed that the daily irrigation water for vegetated land was lower than for tomato cultivation and without vegetation in each measurement period. The frequency of irrigation water application in the two observation periods also showed that the land without vegetation had a higher amount and frequency of water application compared to the other two types of land use.
This service activity to optimize the suitability of mushroom cultivation land on cocopeat media was carried out in the community in Sumber Urip, Selupu Rejang District, Rejang Lebong Regency, Bengkulu Province. This community service activity aims to provide knowledge and practice of oyster mushroom cultivation on cocopeat media to optimize land suitability and improve the economy of the community, especially those in Sumber Urip. This service is carried out by the method of providing material related to mushroom cultivation on cocopeat media in the form of discussions and questions and answers as well as the practice of oyster mushroom cultivation procedures at the inoculation stage in the community of Sumber Urip Village. The tools and materials used in this service have been provided previously from the community service team. in collaboration with the Dangau Datuk Agribusiness Vocational School, Bengkulu City, namely baglog, seeds, masks, alcohol, spatulas, spirit, and rubber bands. The results obtained from this activity are an increase in the knowledge and interest of the people of Sumber Urip Atas in mushroom cultivation with cocopeat media and it is hoped that the enthusiasm of the community to continue this cultivation to produce quality oyster mushrooms and continue to other types of household businesses..
Degraded former gold mining land so that soil fertility is very minimal. Ameliorant mining with an open system causes increased oxidation of sulfurous minerals which reduces nutrient levels and accumulation of heavy metals on the soil surface. This research aims to improve the physical properties of the former gold mining area. This study used a completely randomized design method of 6 treatments with 4 replications. The treatment dose used was 40 tons/ha. The results of this study are that the application of rice husk biochar with manure can provide the best nutrients and growth for sunflower plants.
Soil erodibility index (K) is a complex concept and it is influenced by many soil properties, which can reflect the soil resistance to erosion. The K index indicates soil aggregate resistency to disperse and particle transported by rainfall. Higher the erodibility index, the soil is more susceptible to erosion or in reverse. This study was aimed to show spatial feature of soil erodibility index in the fragile landscape of Bengkulu watershed conducted from July to November, 2021. Spatial analysis used some map and Landsat 8 OLI satellite imagery and ArcGIS version 10.3. The analysis depicted spatial distribution of soil textures, soil structures, soil organic matter contents, soil permeabilities and soil erodibility indices. Actually, soil organic matter content in the hilly range and undulating areas in the upper part of the watershed are categorized moderate to very high classes, however, soil texture classes in the upstream dominantly are covered by sandy loam, and loamy sand. Soil aggregate formation through the soil organic matter and soil texture binding has composed the fine and very fine granular soil structures in the upper part and in the middle part of the watershed. In the upper part and in the middle part of the watershed landscape, in fact, soil permeabilities are classified as from moderate to fast. Overlying the all inherit soil attributes, in short, the soil erodibility indices in the fragile landscape of Bengkulu watershed are not prone to precipitation detachment causing soil erosion and soil productivity deterioration.
The former gold mining land is a land that has a deficient fertility level and is contained heavy metals such as mercury (Hg). The purpose of this research is to study the role of biochar, manure, and clay and the role of sunflowers in reducing mercury (Hg) in the restoration of the former gold mining land. The researcher used a random design method with groups of 3 treatments and 3 repetitions. The treatment consists of 0 ton/ha, 10 ton/ha, and 20 ton/ha biochar, manure, and clay. The result of this research shows the effect of biochar, manure, and clay in reviving the chemical properties of the soil and able to reducing mercury levels in the soil and increasing the production of sunflowers. The best treatment happened in the dose of 20 tons/ha, increasing the chemical properties with the value pH 6.12, P-available 30,89 ppm, C-organic 2,457%, N-total 0,1459%, CEC 23.87 me.100g-1, K-dd 0,1309 me.100g-1, Mg-dd 0,254 me.100g-1, Na-dd 0,116 me.100g-1, Hg 19,748 ppm, sunflower production 4,14 g/100 seeds and sunflowers able to accumulate mercury in the trunk 15,05 ppm and 6,69 ppm in the root.
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