scholarly journals SIFAT KIMIA TANAH PASCA KEBAKARAN LAHAN DI KEBUN KELAPA SAWIT DI KABUPATEN TULANG BAWANG PROVINSI LAMPUNG

2020 ◽  
Vol 8 (1) ◽  
pp. 19-25
Author(s):  
Omar Nurcholis ◽  
Syahrul Kurniawan
Keyword(s):  
Oil Palm ◽  
Base Cations ◽  
Soil Nutrient ◽  
Soil Surface ◽  
Exchange Capacity ◽  
Fire Intensity ◽  
Survey Method ◽  
Soil Base ◽  
The Impact ◽  
Mg Content

Fire is a serious problem that must be faced in the management of forest or plantation areas. Land fires have caused huge losses of soil nutrient. Lampung is one of the provinces in Indonesia having a problem related to land fires. The purpose of this study was to analyze the impact of land fires on the soil base cations (K, Mg, Ca, Na) and cation exchange capacity (CEC) in three different planting zones (i.e. fertilization, harvesting path, and frond stack areas) within oil palm plantations between land with low fire intensity and land with high fire intensity. Observations were made using a survey method in three zones of oil palm plantations, including fertilization area, harvesting path, and frond stack area. Soil samples were collected by using a soil drill at two depths, namely 0-10 cm and 10-30 cm from the soil surface. The study showed that at depth 0-10 cm, land A (land with low fire intensity) had higher K, Na, and Ca contents, as well as higher CEC as compared to land B (land with high fire intensity). At depth 10-30 cm, field A had higher K and CEC content, and lower Mg content than land B. comparing among different zones of oil palm plantations also showed that soil exchangeable K and Mg were significantly different, especially at depths of 10-30 cm. This was due to differences in land management (i.e. fertilization and liming).

scholarly journals Soil fertility changes following conversion of grassland to oil palm

Soil Research ◽  
2014 ◽  
Vol 52 (7) ◽  
pp. 698 ◽  
Author(s):  
P. N. Nelson ◽  
M. Banabas ◽  
S. Nake ◽  
I. Goodrick ◽  
M. J. Webb ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Oil Palm ◽  
Soil Structure ◽  
Volcanic Ash ◽  
Oil Industry ◽  
Soil Bulk Density ◽  
Exchange Capacity ◽  
Forest Sites ◽  
Exchangeable Magnesium ◽  
Mg Content

Impacts of palm oil industry expansion on biodiversity and greenhouse gas emissions might be mitigated if future plantings replace grassland rather than forest. However, the trajectory of soil fertility following planting of oil palm on grasslands is unknown. We assessed the changes in fertility of sandy volcanic ash soils (0–0.15 m depth) in the first 25 years following conversion of grassland to oil palm in smallholder blocks in Papua New Guinea, using a paired-site approach (nine sites). There were significant decreases in soil pH (from pH 6.1 to 5.7) and exchangeable magnesium (Mg) content following conversion to oil palm but no significant change in soil carbon (C) contents. Analyses to 1.5 m depth at three sites indicated little change in soil properties below 0.5 m. There was considerable variability between sites, despite them being in a similar landscape and having similar profile morphology. Soil Colwell phosphorus (P) and exchangeable potassium (K) contents decreased under oil palm at sites with initially high contents of C, nitrogen, Colwell P and exchangeable cations. We also assessed differences in soil fertility between soil under oil palm (established after clearing forest) and adjacent forest at two sites. At those sites, there was significantly lower soil bulk density, cation exchange capacity and exchangeable calcium, Mg and K under oil palm, but the differences may have been due to less clayey texture at the oil palm sites than the forest sites. Cultivation of oil palm maintained soil structure and fertility in the desirable range, indicating that it is a sustainable endeavour in this environment.

scholarly journals Palm Oil Mill Efluent - Zeolite Mixture Improves Acid and Base Cations in Acid Sulfate Soil

2020 ◽  
Vol 25 (1) ◽  
pp. 21
Author(s):  
IDA NUR SANTI
Keyword(s):  
Palm Oil ◽  
Cation Exchange Capacity ◽  
Base Cations ◽  
Exchange Capacity ◽  
Base Saturation ◽  
Acid Sulfate Soil ◽  
Soil Base ◽  
Acid Sulfate ◽  
Exchangeable Al ◽  
Palm Oil Mill

Acid sulfate soil contains high acid cations. Palm oil mill effluent (POME) mixed with zeolite can increase pH of acid sulfate soil. Base cations (Ca, K and Mg) on zeolite are exchangeable with H+  and Al3+ ions in acid sulfate soil. The aim of this study was to investigate the effects of application of POME-zeolite mixture on acid cations of acid sulfate soil. The study was arranged in a Completely Randomized Design, with 9 treatments of POME applied on 10 kg of acid sulfate soil. Acid sulfate soil was put into 45cm x 40cm polybag. POME plus zeolite powder (60 mesh, type clinoptilolite) was applied on soil by watering evenly and incubated for 4 weeks at room temperature. The results showed that the content of acid cations of exchangeable-Al and exchangeable-H decreased by 71.21% and 27.71%, respectively after application of POME -zeolite. The application of POME without zeolite decreased the content of exchangeable-Al and exchangeable-H by 46.54% and 42.75%, respectively. Aluminium saturation has decreased after POME-zeolite application from 42.68% (high) to 8.52% (very low). Base saturation increased after application of POME-zeolite application from 17.64% (very low) to 34.88% (low). Application of palm oil mill effluent-zeolite mixture decreased acid cations in acid sulfate soil. Base saturation correlates positively to pH and cation exchange capacity and negatively correlates to Al saturation. The main factors controlling the increase of pH, base saturation and cation exchange capacity of acid sulfate soil after POME-zeolite application were the decrease of exchangeable-H, followed by exchangeable-Al and total-Fe.

scholarly journals Variations of Soil Properties on Post Shifting Cultivation area in Primary Forest

2021 ◽  
Vol 305 ◽  
pp. 04004
Author(s):  
Malihatun Nufus ◽  
Budiadi ◽  
Widiyatno
Keyword(s):  
Tropical Forest ◽  
Soil Properties ◽  
Shifting Cultivation ◽  
Soil Depth ◽  
Soil Nutrient ◽  
Soil Surface ◽  
Exchange Capacity ◽  
Dynamic Monitoring ◽  
Primary Forest ◽  
Soil Recovery

Shifting cultivation in tropical forest was presumed as the major cause of soil degradation and soil nutrient depletion, and need several years--namely forest-fallow periods-- to be recovered. Soil properties dynamic monitoring has been done in the tropical forest in Central Kalimantan at one, five and ten year after abandonment, and compared to primary forest, to predict the time for soil recovery in term of Calcium (Ca), Magnesium (Mg), Potassium (K), Natrium (Na) content and cation exchange capacity (CEC). The soil properties status can be beneficial for rehabilitation activities through practicing agroforestry by the forest dwellers. The results showed that soil properties (i.e. Ca, Mg, K, CEC) were significantly different among soil depth (P<0.05), but not for Na. Highest value of Ca, Mg, K and Na were observed in the soil surface (0-20 cm), Soil nutrient contents were significantly changed with the time of abandonment, the highest value of CEC, Ca, K, and pH were found in five years after the abandonment. It suggested that soil nutrients were distributed in the soil surface composed from litter of pioneer trees. The research suggested that soil recovery was probably occurred during early fallows, and agroforestry can be practiced at five year after the abandonment.

Is the use of trees with superior growth a threat to soil nutrient availability? A case study with Norway spruce

2004 ◽  
Vol 34 (3) ◽  
pp. 560-572 ◽  
Author(s):  
Nicolas Bélanger ◽  
David Paré ◽  
Mireille Bouchard ◽  
Gaëtan Daoust
Keyword(s):  
Norway Spruce ◽  
Base Cations ◽  
Soil Nutrient ◽  
Exchange Capacity ◽  
Mineral Weathering ◽  
Nutrient Pools ◽  
Total N ◽  
Nutrient Immobilization ◽  
Exchangeable Ca ◽  
High Treatment

The renewed interest in the use of fast-growing tree species is accompanied by concerns about the adverse effects that these trees may have on soil. Four Norway spruce (Picea abies (L.) Karst.) provenance trials in Quebec were used to test the hypothesis that a more vigorous growth would not occur at the expense of marginalizing available nutrient pools. On these sites, the provenance showing the greatest overall productivity (high treatment) and the one showing the lowest productivity (low treatment) were studied. The divergence in total aboveground nutrient contents between the high and low treatments was high in all sites (i.e., 161%–209%). Increased nutrient immobilization in trees did not cause any significant soil depletion of available base cations or total N at any site. Moreover, exchangeable Ca concentrations, cation-exchange capacity, and exchangeable Ca pools in the forest floor were significantly higher in the high treatment. It is concluded that in the short term, increased nutrient immobilization in trees does not create an apparent depletion of available base cations, perhaps because of a stimulation of soil mineral weathering and (or) a better retention of nutrients by the trees. Also, an effort to simulate mineral weathering using PROFILE showed the need for model improvement for applications at the plot level.

scholarly journals DAMPAK PERKEBUNAN KELAPA SAWIT RAKYAT TERHADAP PENDAPATAN WILAYAH DESA DI PROVINSI JAMBI

2013 ◽  
Vol 12 (1) ◽  
pp. 109-121
Author(s):  
Armen Mara ◽  
Yanuar Fitri
Keyword(s):  
Oil Palm ◽  
Land Development ◽  
Survey Method ◽  
Economic Sectors ◽  
Location Quotient ◽  
Secondary Sources ◽  
Oil Revenue ◽  
The People ◽  
The Impact ◽  
The Village

Smallholder oil palm estate in Jambi Province is growing. Some indicators are land development, production, and employment. Smallholder oil palm estate can be a major driver of the economy so that the country can move other economic sectors, such as trade, transport, electricity and gas, manufacture small industrial and other sectors, which in turn increases the income of the village as a whole. This study aimed to determine (1) the development of oil palm estate seen from land, production, and employment in the province of Jambi (2) Impact of smallholder oil palm estate against Gross Regional Domestic Product Villages in Jambi Province. The research method used in this study is a survey method. This method of research was done deductively, by conducting an analysis of the object. Data were collected from primary sources and secondary sources. The development of oil palm plantations quantitatively analyzed descriptively. To determine whether the development of oil palm plantations had such an impact is determined by the formula LQ (Location Quotient) and the magnitude of the impact made by Formula ME (multiplier effect). To determine the value of LQ and ME the sample villages can be determined that a major driver of the sector (Prime mover sector) in the village economy.  These results indicate that oil palm plantations have grown rapidly both views of land, production, and employment. Oil palm plantations have an impact on the income of the people of the village, where 9 of 20 samples villages have values LQ>1 with the average ME value was 1.4107, which means that any increase in palm oil revenue amounted toRp1, -it will be able to increase the income of the region village as a whole amounted to1.4107times. The impact is especially true of the sub-sectors of trade, transport sub-sector, and electricity and gas sub-sector. The impact is small relative to the manufacturing sector.Key words: smallholders oil palm estate, GRDB of villages, LQ, and ME.   

scholarly journals Market Liberalization and Performance of Oil Palm Smallholder Farmer’s Household

2020 ◽  
Vol 9 (2) ◽  
pp. 190-201
Author(s):  
Andi Irawan
Keyword(s):  
Oil Palm ◽  
Smallholder Farmers ◽  
Simple Random Sampling ◽  
Primary Data ◽  
Survey Method ◽  
Household Economy ◽  
Farm Production ◽  
Output Market ◽  
And Performance ◽  
The Impact

This study aimed to analyze the impact of market The data used in the study are cross-section primary data related to the household economy of oil palm smallholder farmers.  Data collection was carried out in three provinces of production center of oil palm in Indonesia i.e. Jambi, Sumatera Selatan, and Bengkulu. One district of oil palm production center is chosen for each province i.e. Muaro Jambi, Banyu Asin, and Bengkulu Utara, respectively.  Total samples in this research are 155 farm households by using simple random sampling method, consist of 52 samples for Bengkulu Utara, 57 samples for Sumatera Selatan and 46 samples for Jambi, respectively.  Primary data are collected from farmer household samples by survey method using questionnaires. The smallholder farmer’s oil palm household economic model in this study was formulated in a system of simultaneous equations. The results indicated that liberalization of the output market but still gave protection in the input market at least subsidized fertilizer will contribute positively not only to farming performance i.e. farm production and investment but also to farmer household welfare i.e. increased farming profit and consumption of basic need commodities and other goods which bought in the market.

scholarly journals Biochar Reduces the Stability of Soil Aggregates during Intensive Leaching Experiment

Agronomy ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1910
Author(s):  
Nikola Teutscherova ◽  
Bohdan Lojka ◽  
Marta Benito ◽  
Alberto Masaguer ◽  
Eduardo Vázquez
Keyword(s):  
Negative Impact ◽  
Soil Aggregates ◽  
Chemical Properties ◽  
Base Cations ◽  
Exchange Capacity ◽  
Soil Aggregation ◽  
The Stability ◽  
Moisture Conditions ◽  
The Impact ◽  
Higher Sensitivity

The interplay of different mechanisms shaping the biochar impact on soil structure remains relatively unexplored. We investigated the impact of biochar application to two contrasting soils on the stability of soil aggregates under an intensive intermittent leaching regime. A greenhouse experiment was established using PVC columns filled with 500 g soil from an Acrisol or Calcisol amended with three biochar applications (0, 1 and 2% w/w). The columns were watered weekly (100 mL) during two leaching cycles (each lasting 10 weeks). The amount of leached base cations, the stability of 1–2 mm aggregates fraction and soil chemical properties were determined. Biochar enhanced the leaching of the studied cations, but the content of base cations and effective cation exchange capacity remained higher in the biochar-amended Acrisol when compared to control soil. In both soils, biochar reduced the amount of water-stable aggregates, which seemed to be attributed to the increase of K in the exchange complex in the Acrisol while no significant correlation was detected between aggregation in Calcisol and other variables. The negative impact of biochar on soil aggregation is likely linked to higher sensitivity of biochar-amended soils to aggregate disruption under changing moisture conditions caused by frequent and intensive leaching events. These results highlight the gaps in our understanding of biochar impact on soil aggregation, which have implications for soil erodibility or restoration of degraded lands under changing climate.

scholarly journals INTENSITAS KEBAKARAN LAHAN GAMBUT BERDAMPAK PADA KEMASAMAN TANAH DI KEBUN KELAPA SAWIT, KABUPATEN TULANG BAWANG, PROVINSI LAMPUNG

2020 ◽  
Vol 8 (1) ◽  
pp. 107-114
Author(s):  
Ghani Ilham Prawiradijaya ◽  
Syahrul Kurniawan
Keyword(s):  
Soil Ph ◽  
Oil Palm ◽  
Soil Acidity ◽  
Soil Depth ◽  
Fire Intensity ◽  
Survey Method ◽  
Nutrient Elements ◽  
Oil Palm Plantation ◽  
Top Soil ◽  
Peat Fires

Peatlands have specific characteristics, namely irreversible drying, so that become flammable. Peat fires have an impact on changes in soil pH. The study aimed to analyze the soil acidity after peatland fires in oil palm plantation. This study used a survey method on two main plots (low and high fire intensity). Samples were taken at two soil depth including 0-10 cm and 11-30 cm in three zones (fertilization area, harvest path and frond pile zone) and repeated three times. Data were analyzed by ANOVA using the 5% nested test, then LSD test, and analyzed for correlation. The results showed that the soil pH on all land was included in the very acid category. Soil pH in the land B (land with high fire intensity) is higher than those in the land A (land with low fire intensity), both in top soil and sub soil. The micro-nutrient elements of Fe and Al in the land B are lower than land A, while the micro-nutrients of Mn in land B are higher than land A. The correlation of soil pH towards Fe and Al is negative, while for Mn is positive (pH increases, acid cations of Fe and Al will decrease while acid cations of Mn will increase). This was presumably due to competition in occupying the land-catchment complex.

HEALTHINESS OF OIL PALM PLANTATION TOWARDS SUSTAINABILITY OF ENVIRONMENT

2020 ◽  
Vol 7 (1) ◽  
pp. 21
Author(s):  
Faradina Marzukhi ◽  
Nur Nadhirah Rusyda Rosnan ◽  
Md Azlin Md Said
Keyword(s):  
Oil Palm ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Satellite Image ◽  
Vegetation Indices ◽  
Soil Nutrient ◽  
Oil Palm Plantation ◽  
Sustainable Environment ◽  
Moisture Analysis ◽  
The Relationship

The aim of this study is to analyse the relationship between vegetation indices of Normalized Difference Vegetation Index (NDVI) and soil nutrient of oil palm plantation at Felcra Nasaruddin Bota in Perak for future sustainable environment. The satellite image was used and processed in the research. By Using NDVI, the vegetation index was obtained which varies from -1 to +1. Then, the soil sample and soil moisture analysis were carried in order to identify the nutrient values of Nitrogen (N), Phosphorus (P) and Potassium (K). A total of seven soil samples were acquired within the oil palm plantation area. A regression model was then made between physical condition of the oil palms and soil nutrients for determining the strength of the relationship. It is hoped that the risk map of oil palm healthiness can be produced for various applications which are related to agricultural plantation.

The Role of Career Self-Efficacy on the Effect of Parental Career Behaviors on Career Exploration: A Study on School of Tourism and Hotel Management’ Students

2016 ◽  
Vol 3 (1) ◽  
pp. 143 ◽  
Author(s):  
Selahattin Kanten ◽  
Pelin Kanten ◽  
Murat Yeşiltaş
Keyword(s):  
Undergraduate Students ◽  
Self Efficacy ◽  
Structural Equation ◽  
Career Exploration ◽  
Equation Modeling ◽  
Survey Method ◽  
Hotel Management ◽  
Mediating Role ◽  
The Impact

This study aims to investigate the impact of parental career behaviors on undergraduate student’s career exploration and the mediating role of career self-efficacy. In the literature it is suggested that some social and individual factors facilitate students’ career exploration. Therefore, parental career behaviors and career self-efficacy is considered as predictors of student’s career exploration attitudes within the scope of the study. In this respect, data which are collected from 405 undergraduate students having an education on tourism and hotel management field by the survey method are analyzed by using the structural equation modeling. The results of the study indicate that parental career behaviors which are addressed support; interference and lack of engagement have a significant effect on student’s career exploration behaviors such as intended-systematic exploration, environment exploration and self-exploration. In addition, it has been found that one of the dimensions of parental career behaviors addressed as a lack of engagement has a significant effect on career self-efficacy levels of students. However, research results indicate that student’s career self-efficacy has a significant effect on only the self-exploration dimension. On the other hand, career self-efficacy has a partial mediating role between lack of engagement attitudes of parents and career exploration behaviors of students.

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