Momon Sodik Imanudin, Momon Sodik
Research Center for Suboptimal Land, Universitas Sriwijaya, Jalan Sriyaja Negara Ilir Barat I Palembang Sumatera Selatan

Published : 6 Documents
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Changes to Some Physical Properties due to Conversion of Secondary Forest of Peat into Oil Palm Plantation Junedi, Heri; Armanto, M Edi; Bernas, Siti Masreah; Imanudin, Momon Sodik
Sriwijaya Journal of Environment Vol 2, No 3 (2017): Low Land
Publisher : Program Pascasarjana Universitas Sriwijaya

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Abstract

The purpose of this study was to study how the physical properties of peat change due to the conversion of secondary forest into oil palm plantations.  It was done by comparing the three conversion stages of the secondary forest into shrubs and oil palm plantations.  The study was conducted in Ogan Komering Ilir District, South Sumatera Province, about 100 km south of Palembang, Indonesia from August to December 2016.  Data collection was done randomly at all sites, each of five points for field sampling, observation of soil profile and measurement of hydraulic conductivity and water table depth.  The samples were collected at a depth of 0-30 cm, both for undisturbed cores and bulk samples.  The hydraulic conductivity was measured in the field using the auger holes method.  The peat strength was determined by using the hand operated cone penetrometer.  Data analysis was done descriptively and regression correlation test.  The results showed that conversion of secondary forests into oil palm plantations has led to the decline in the quality of some of the physical properties of peat by decreasing total porosity, water table depth, hydraulic conductivity, organic matter content, moisture content and increasing the bulk density and peat strength.
VARIABILITY OF GROUND WATER TABLE AND SOME SOIL CHEMICAL CARACHTERISTIC ON TERTIARY BLOCK OF TIDAL LOWLAND AGRICULTURE SOUTH SUMATERA INDONESIA Imanudin, Momon Sodik
Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 14, No 1 (2017)
Publisher : Faculty of Agriculture, Universitas Sebelas Maret

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Abstract

Agriculture and irrigation policies in the tidal wetlands are often too general, thus at the level of farm units they are often inaccurate in term of quality and quantity. The research purpose was to analyze the groundwater levels and to determine the effect of groundwater levels in relation to some soil chemical characters in tidal wetlands P17-5S Mulyasari village Delta Telang II Banyuasin.  Indicators of potential land can be analyzed from parameters of variability of soil acidity, Al and Fe content, organic matter and phosphorus and nitrogen status of the soil. Managed limited area was the smallest unit of water management (tertiary plots). The decision was taken based on the dominant values of the hydro-physical and chemical characters. Input criteria design involved the nature of the soil, land use, and hydrology. The field study and analysis showed dominance in soil physical variability. Around 50% of hydraulic conductivity was classified rapid soil with soil acidity is relatively high, moderate nitrogen, low phosphorus, and moderate potassium. Based on these conditions, cropping pattern applied was rice-corn, rice-water melon, soil fertility can be improved through fertilization of N and P; increasing water gate in the tertiary plots, and the water management aimed to controlled drainage
Option for Land and Water Management to Prevent Fire in Peat Land Areas of Sumatera, Indonesia Imanudin, Momon Sodik; Wildayana, Elisa; Armanto, M. Edi
Journal of Wetlands Environmental Management Vol 6, No 1 (2018): January-June, 2018
Publisher : Center for Journal Management and Publication

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Abstract

Investment development for oil palm plantation in Indonesia was increasing and it clear away into peat land area. Land clearing activities without considering peat ecological function may have impact on environmental degradation. The objective of this research was to study development potential of oil palm plantation at peat land by using land evaluation approach. The field survey method was observation scale and land suitability assessment was based on FAO standard with adjustment. Assessment results showed that land had peat thickness higher than 3 m covering 28% of total area so that it can be opened for oil palm plantation. The main constraint factors for the clearing of feasible area were soil reaction, flooding condition and nutrients status. These parameters could be potentially improved. However, final assessment of land showed that it was classified as less feasible (S2) due to relatively high investment.  Cultivation can only be conducted with provision of drainage facility. Caution should be taken in designing open channel in order to prevent excessive water drainage. Therefore, hydrologic analysis can be based on 5 years return period only. Computer simulation of DRAINMOD was applied to determine the operational effect of control structures in elevating of water table during dry season. Simulation results showed that during the opening operation of open channel without control structures at dry season, water table was dropped up to 90 cm below soil surface. Water retention effort in tertiary channel at 70 cm level could elevated water up to 30-40 cm below soil surface. The key success for oil palm plantation development at peat land was highly depended on availability of control structure at tertiary channel. Flap water gate type from fibre material was very suitable for field application. Retention system by using soil sack or stoplog water gate could be implemented at initial stage in order to economize the cost.  
Spatial Analyses of Landuse Changing under Different Hydrotopography Classes in Tidal Lowland Reclamation Areas (A Case Study of Saleh Delta Areas in Banyuasin Regency, South Sumatera) Imanudin, Momon Sodik
Journal of Wetlands Environmental Management Vol 6, No 2 (2018): : (July-December)
Publisher : Center for Journal Management and Publication

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Abstract

The aim of this research is to identify the changing of landuse in the tidal lowland areas and to determine the cropping pattern in each secondary block in related to drainage network system and hydrotophography class. The study was carried out in Saleh Deltaic areas. The used methodology was field survey and remote sensing technique. It was combined with GIS technology for spatial analysis.  The research result showed that the paddy fields field is still the widest areas. However, according to Landsat Imaginary analysis showed that for 1992 up to 2002, there has been change of landuse pattern. The paddy field was significantly decreasing from 23,639.40 ha to become 18,518.40 ha or about 27,65 %.  Some paddy fields field was converted to coconut areas and it was due to poor maintenance of the water system on canal, high sedimentation and the water become unavailable in the field. Thus the paddy field was changed to coconut areas. Analyzing cropping pattern show that the most available cultivation in the area is paddy fields-fallow (Cropping index 100 %). There was only about 10 % having cropping index 200 %.  For that reason the improving land quality is very essential to increase landuse intensity and especially for paddy fields cultivation. Therefore, the rehabilitation of canal system and installing the hydraulic structure is the first priority for implementing agriculture program. Otherwise the paddy fields area would be reduced every year.  The main impact of these is threatening to the food security inSouth Sumatera.
Land And Water Management Option of Tidal Lowland Reclamation Area to Support Rice Production (A Case Study in Delta Sugihan Kanan of South Sumatra Indonesia) Imanudin, Momon Sodik; Bakri, Bakri; Armanto, Muhammad Edi; Setiawan, Budi Indra; NP, Ratmini S
Journal of Wetlands Environmental Management Vol 6, No 2 (2018): : (July-December)
Publisher : Center for Journal Management and Publication

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The main problem for agriculture at tidal lowland swamp is low soil quality and high acidity of soil and high water. The research objective was to investigate how far the effort in increasing tertiary canal network to improve water quality (increasing pH and reducinf iron) in channel and tertiary plot. Field study was conducted at Bandarjaya Village of Jalur 25, Delta Sugihan Kanan, South Sumatra. Field activities were consisted of network investigation  land use and farm enterprise system which located at Primr 13 of Sugihan Kiri and Primer 25 of Sugihan Kanan. The network improvement perfomance was conducted by constructing micro water management (installed the tertiary gate and developen quartey canal) at tertiary plot which consisted of collector channel, sub tertiary channel and control plot which was outfall at quarterly channel downstream end. Water gate having goose neck pipe system was constructed to control water table in tertiary channel. Results of field study showed that land use at the study area was still dominated by rice crop with magnitude of 83% and the rest of 17% was used for rubber plantation, orange planation and mix plantation. The depth of phyrite layer was in the range of 60 to 100 cm below soil surface. Water table surface in October was in the range of 10 to 35 cm. Field adaptation showed that water gate was operated in closed condition (water retention) during vegetative phase. Water retention showed significant to improve rice yield in which water table since November had increased from -10 cm to flooding condition of 15 cm in January. This condition provide sufficient water for rice crop which was similar as the result found at irrigation area. The addition of ameliorant substances such as coconut fiber, and sand semen block at outfall of tertiary and kuartely channels also increase water quality in which water pH was increased from  2.95 to 3.7 and iron concentration was decreased from 4.01 to 0.32 mg/liter. Rice yield was increased from average production of 2 ton/ha to 3 ton/ha. This low production was due to land flushing process which need longer time process for at least 2 to 3 years from current condition as well as other production inputs such as fertilization and ameliorant substances.
Ratoon Systems in Tidal Lowland: Study of Groundwater Dynamics and the Change of Nutrient Status on Rice Growth Imanudin, Momon Sodik; Bakri, Bakri; Jelita, Raina
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 15, No 2 (2018): December
Publisher : Universitas Sebelas Maret

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Abstract

It has been widely known that crop cultivation in tidal lowland areas in the second crop (March-April) is not conducted by farmers in a maximum way. Thus, this research aims at investigating the dynamics of groundwater and its nutrient status condition for the purpose of supporting plant cultivation in the second crop after rice planting. The study was conducted in Banyu Urip Village, Tanjung Lago Telang II, Banyuasin. The plant used in this activity was paddy, with the treatment of a ratoon cultivation system. The ratoon system is paddy cultivation by using the first paddy planting season shoots. A urea treatment was given with a dose of 0 kg/ha (control) and a dose of 150 kg/ha. The results of soil analysis showed that, although not significant, there was an increase in the nutrient status of the soil condition. Therefore, it can be concluded that fertilizing was considered ineffective for the system of ratoon cultivation. The study of groundwater dynamics showed that at the early phase, a groundwater table was dropped above 30 cm (critical) but it could increase by the rain and water retention in the canal. The average of the groundwater table during the ratoon period was at the depth of 5-30 cm below the soil surface, allowing it to be suitable for plant growth. The plant growth at B treatment was better and its production was 2.8 ton/ha. This 2.8 ton/ha plant production was classified as a high category for paddy with the ratoon cultivation system. There is no effect of the fertilizer treatment on the nutrient status in the soil. Moreover, the application of fertilizer did not give a significant result on the production of rice.