An Area Survey Method of Investigating the Distribution of Light Intensity in Woodlands, with Particular Reference to Sunflecks

1956 ◽  
Vol 44 (2) ◽  
pp. 391 ◽  
Author(s):  
G. C. Evans
Keyword(s):  
Light Intensity ◽  
Survey Method ◽  
Area Survey

scholarly journals PRODUKSI KELAPA SAWIT (Elais guineensis Jacq.) DENGAN SISTEM PEREMAJAAN YANG BERBEDA

2020 ◽  
Vol 5 (1) ◽  
pp. 6
Author(s):  
Nasamsir Nasamsir ◽  
Edi Romadoni
Keyword(s):  
Light Intensity ◽  
Soil Ph ◽  
Oil Palm ◽  
Crop Production ◽  
Sampling Method ◽  
Plant Production ◽  
Survey Method ◽  
Systematic Sampling ◽  
Physical Plant ◽  
Systematic Sampling Method

Abstract This study aims to determine the production of oil palm with a different replanting system. The study was conducted in the area of simultaneous fallen replanting system and underplanting system area located in Panca Mulya Village, Sungai Bahar District, Muaro Jambi Regency. The material used in this study was the Tenera variety of oil palm plants aged 4.5 years and 5.5 years. The study used a survey method with systematic sampling method. The main variables observed were plant production as well as physical plant additional variables, soil pH, light intensity, temperature, and humidity. The results showed that the replanting system significantly affected the production of oil palm plants and plant physicality, soil pH, light intensity, temperature, and air humidity. Palm oil crop production is higher in areas with simultaneous fallen replanting systems. Key words: replanting system, oil palm

scholarly journals Performan Produksi Kambing Saburai Jantan Pada Dua Wilayah Sumber Bibit di Kabupaten Tanggamus

2017 ◽  
Vol 14 (2) ◽  
pp. 22
Author(s):  
Kusuma Adhianto ◽  
M. Dima Iqbal Hamdani ◽  
Sulastri Sulastri ◽  
Indah Listiana
Keyword(s):  
Birth Weight ◽  
Sampling Method ◽  
Source Area ◽  
Production Performance ◽  
Survey Method ◽  
Purposive Sampling ◽  
Area Survey ◽  
Student Test ◽  
Daily Gain ◽  
Test Result

<p class="Default">Saburai goat was crossing breed by grading up between male Boer and female Ettawah grade goat. This research was conducted to compare production performance of male Saburai goat at Gisting subdistrict and Sumberejo subdistrict as Saburai goat breeding source area. Survey method were used in this research by observation to 90 at Gisting subdistrict and 90 at Sumberejo subdistrict tails male Saburai goat as sample. The sample were choosed by purposive sampling method. Variables observed were birth weight (BW), weaning weight (WW), yearling weight (YW), average of preweaning daily gain (APreDG), average of postweaning daily gain (APostDG). The data was analyzed by t-student test. Result of research indicated that BW (3,42+0,28 kg), WW (16,22+3,77 kg), YW (36,56+4,85 kg), APreDG (140,00+0,04 g/tail/day), APostDG (70,00+0,02 g/tail/day) of Saburai goat at Gisting subdistrict was not different (P&gt;0,05) with Saburai goat at Sumberejo subdistrict (BW 3,48+0,41 kg, WW 16,85+258 kg, YW 38,30+5,35 kg, APreDG 150,00+0,03 g/tail/day, APostDG 80,00+0,02 g/tail/day).</p><p class="Default"> </p><p>Keywords: performance production, Saburai male goat, Tanggamus</p>

scholarly journals Distribution of natural resources and population density in the merapi volcano area

2020 ◽  
Vol 35 (2) ◽  
pp. 55
Author(s):  
Sutikno Sutikno ◽  
Widiyanto Widiyanto ◽  
Langgeng Wahyu Santosa ◽  
Andri Kurniawan ◽  
Taufik Hery Purwanto
Keyword(s):  
Population Density ◽  
Natural Resources ◽  
Secondary Data ◽  
Qualitative Approach ◽  
Survey Method ◽  
Populated Area ◽  
Merapi Volcano ◽  
Thematic Map ◽  
Landform Unit ◽  
Area Survey

The objective of this research is to study spatial distribution of natural resources and their relation to population density of the Merapi volcano area Survey method was used in this research, and started by thematic map and remote sensing imagery imerpretationdieldwork was carried out to check the interpretation result and to observe the actual natural resources in the sample areas were determined by purposive sampling. Population density data were collected by secondary data from sub-district. Descriptive, qualitative approach was used to data analysis and landform unit was used for evaluation of the natural resources.. The findings of this research are: spatially the natural resources, potency varies according to landform unit, and each landform unit has specific natural resources potency, it). the availability of the natural resources in the landform unit has closed relationship to the population density, high and enormous of natural resources usually followed by densely populated, the high densely populated area not always influenced by the existing of the natural resources but also by the functional of the area.

scholarly journals Keanekaragaman Jenis Kupu-kupu Familia Nymphalidae dan Pieridae di Kawasan Cirengganis dan Padang Rumput Cikamal Cagar Alam Pananjung Pangandaran

Agrikultura ◽  
2018 ◽  
Vol 29 (1) ◽  
pp. 1
Author(s):  
Virda Catur Lestari ◽  
Tatang S. Erawan ◽  
Melanie Melanie ◽  
Hikmat Kasmara ◽  
Wawan Hermawan
Keyword(s):  
Light Intensity ◽  
Diversity Index ◽  
Abiotic Factors ◽  
Tectona Grandis ◽  
Survey Method ◽  
Abiotic Factor ◽  
Butterfly Diversity ◽  
Melastoma Malabathricum ◽  
The Family

ABSTRACTThe diversity of butterflies’ family of Nymphalidae and Pieridae at Cirengganis area and Cikamal Savannah area of Pananjung Sanctuary of PangandaranThe research reported the diversity o.f butterflies of Nymphalidae and Pieridae Families at Cirengganis area and Cikamal Savannah area which located at Pananjung Sanctuary, Pangandaran. The experiment was conducted using visual encounter survey method. The butterflies were caught using sweeping technique. The butterflies were collected and identified. Abiotic factors such light intensity and temperature were measured during observation. The result showed that 13 species of nymphalidae family were identified whilst only 2 species were identified belongs to the family of Pieridae. Butterfly diversity index at Cirengganis and Cikamal Savannah categorized as moderate with value of 2.285647. Vegetation that interacted with the butterflies were Tectona grandis), Psychotria aurantiaca, and Melastoma malabathricum. Furthermore, light intensity and temperature at Cirengganis were detected at 12473.33 lux and 28.6oC, respectively. While at Cikamal Savannah, the light intensity was measured at 26900 lux and temperature reached 33.6oC.Keywords: Visual encounter survey, Abiotic factor, VegetationABSTRAKPenelitian ini melaporkan mengenai keanekaragaman Jenis Kupu-Kupu Famili Nymphalidae dan Pieridae di kawasan Cirengganis dan Padang Rumput Cikamal Cagar Alam Pananjung Pangandaran. Metode yang digunakan adalah metode Visual Encounter Survey (VES). Penangkapan kupu-kupu dilakukan dengan teknik sweeping. Kupu-kupu yang diperoleh dikoleksi dan diidentifikasi. Faktor abiotik seperti intensitas cahaya dan suhu diukur selama pengamatan. Serta diamati pula vegetasi sekitar lokasi pengamatan yang berinteraksi dengan kupu-kupu. Hasil pengamatan diperoleh total kupu-kupu famili Nymphalidae sebanyak 13 spesies dan kupu-kupu famili Pieridae sebanyak 2 spesies. Nilai indeks keanekaragaman kupu-kupu di kawasan Cirengganis dan Padang Rumput Cikamal tergolong kategori sedang yaitu 2,285647. Hasil vegetasi yang diketahui berinteraksi dengan kupu-kupu yaitu jati (Tectona grandis), ki kores (Psychotria aurantiaca), dan harendong (Melastoma malabathricum). Sementara rata-rata intensitas cahaya dan suhu di Cirengganis sebesar 12473,33 lux dan 28,6oC dan di Padang Rumput Cikamal sebesar 26900 lux dan 33,6oC.Kata Kunci: Visual Encounter Survey, Faktor abiotik, Vegetasi

scholarly journals KAJIAN EKOLOGI PASAK BUMI (Eurycoma longifolia Jack) DAN PEMANFAATAN OLEH MASYARAKAT DI SEKITAR HUTAN LARANGAN ADAT RUMBIO, KABUPATEN KAMPAR PROVINSI RIAU

2016 ◽  
Vol 11 (2) ◽  
pp. 34-48
Author(s):  
Sapruddin Hasibuan ◽  
Eni Suhesti ◽  
Enny Insusanty
Keyword(s):  
Light Intensity ◽  
Blood Circulation ◽  
Survey Method ◽  
Air Humidity ◽  
Sloping Ground ◽  
Know How ◽  
Ecological Conditions ◽  
Eurycoma Longifolia ◽  
Average Temperature ◽  
Eurycoma Longifolia Jack

Pasak bumi is one kind of medicinal plants commonly consumed by people and grow in Prohibition of Indigenous Forests Rumbio. Information on the ecological conditions Pasak bumi in Prohibition of Indigenous Forests Rumbio is important known as an indicator of the presence of Pasak bumi, and their population in the forest. The purpose of this study to analyze the ecological conditions Pasak bumi in Prohibition of Indigenous Forests Rumbio , and know how to use Pasak bumu conducted by people around the Prohibition of Indigenous Forests R umbio. The method used in this study was a survey method, the implementation of the research started from the observation, creating a plot, measurement, and data acquisition. The average temperature in the research location 28,09 0 C, average air humidity 85.38%, and the average light intensity of 582.20 lux, type of soil is Red Yellow Podzolic, w ith a pH of 5.5-6.4. Pasak bumi found in site which it is flat and slopes for 15%, with an altitude of 600-750 m above sea level. Pasak bumi grown on sloping ground that is not waterlogged. Communities around the Prohibition of Indigenous Forests Rumbio utilize Pasak bumi from the leaves, stems, bark and roots. The perceived benefits of the Pasak bumi by society is to improve blood circulation, eliminate fatigue, malaria drugs, smooth urination, mouth sores, itching disease medicine, a tonic after childbirth and fever.

scholarly journals KAJIAN SIFAT FISIKA TANAH DAS SUMPUR BAGIAN HULU KABUPATEN TANAH DATAR

Jurnal Solum ◽  
2007 ◽  
Vol 4 (1) ◽  
pp. 18
Author(s):  
Yulnafatmawita Yulnafatmawita ◽  
Asmar Asmar ◽  
Aulia Rahman
Keyword(s):  
Land Use ◽  
Physical Properties ◽  
Soil Texture ◽  
Rice Field ◽  
Soil Physical Properties ◽  
Survey Method ◽  
Water Drainage ◽  
West Sumatra ◽  
Area Survey ◽  
The Impact

A research about study of soil physical properties in upper part of Sumpur Watershed in Tanah Datar Regency, West Sumatra was conducted in 2005.  The objective of the research was to supply information about soil physical properties in the upper part of Sumpur watershed.  These data are important to predict the erosion that can happen in that area and the impact to the surrounding area.  Survey method with purposive random sampling was employed to this research for sampling soil in the field.  Soil was sampled from each land use randomly.  There were four types of land use found in the area, those were forest, mixed wood, annual season crops, and rice field.  Based on field observation it was found that  there were two classes of soils there, Andisols and Inceptisols.  The results of laboratory analyses showed that soil texture in Andisols was silt loam, it was the same for each land use.  Soil texture in Inceptisols, however, was finer than that in Andisols, it was clay.  Bulk volume and total pores of both Andisol and Inceptisol for each land use were not yet different from those in the forest land use.  Then, the value for plant available water, drainage pores, and water retaining pores in each land use for both soils were still comparable to those in forest and use.   However, soil organic carbon (OC) content tended to decrease as land use change from forest to mixed wood, annual season crops, and rice field at both soils except for mixed wood land use in Inceptisol.  The soil OC in that land use was slightly higer than that in the forest.  Key Words: land use, soil OC, soil physical properties

scholarly journals Performan Produksi Kambing Saburai Jantan Pada Dua Wilayah Sumber Bibit di Kabupaten Tanggamus

2017 ◽  
Vol 14 (2) ◽  
pp. 22
Author(s):  
Kusuma Adhianto ◽  
M. Dima Iqbal Hamdani ◽  
Sulastri Sulastri ◽  
Indah Listiana
Keyword(s):  
Birth Weight ◽  
Sampling Method ◽  
Source Area ◽  
Production Performance ◽  
Survey Method ◽  
Purposive Sampling ◽  
Area Survey ◽  
Student Test ◽  
Daily Gain ◽  
Test Result

<p class="Default">Saburai goat was crossing breed by grading up between male Boer and female Ettawah grade goat. This research was conducted to compare production performance of male Saburai goat at Gisting subdistrict and Sumberejo subdistrict as Saburai goat breeding source area. Survey method were used in this research by observation to 90 at Gisting subdistrict and 90 at Sumberejo subdistrict tails male Saburai goat as sample. The sample were choosed by purposive sampling method. Variables observed were birth weight (BW), weaning weight (WW), yearling weight (YW), average of preweaning daily gain (APreDG), average of postweaning daily gain (APostDG). The data was analyzed by t-student test. Result of research indicated that BW (3,42+0,28 kg), WW (16,22+3,77 kg), YW (36,56+4,85 kg), APreDG (140,00+0,04 g/tail/day), APostDG (70,00+0,02 g/tail/day) of Saburai goat at Gisting subdistrict was not different (P&gt;0,05) with Saburai goat at Sumberejo subdistrict (BW 3,48+0,41 kg, WW 16,85+258 kg, YW 38,30+5,35 kg, APreDG 150,00+0,03 g/tail/day, APostDG 80,00+0,02 g/tail/day).</p><p class="Default"> </p><p>Keywords: performance production, Saburai male goat, Tanggamus</p>

scholarly journals Komunitas Makrozoobentos di Sungai Gua Pintu Ngalau pada Kawasan Karst di Sumatera Barat

2018 ◽  
Vol 5 (1) ◽  
pp. 41
Author(s):  
Husnul Mar’i ◽  
Izmiarti Izmiarti ◽  
Nofrita Nofrita
Keyword(s):  
Organic Matter ◽  
Light Intensity ◽  
Organic Material ◽  
Random Sampling ◽  
Diversity Index ◽  
Survey Method ◽  
Stratified Random Sampling ◽  
Total Density ◽  
Irrigated Rice ◽  
Dark Zone

Pintu Ngalau cave is flowed by river from irrigated rice fields that flows into the cave. This cave has a source of organic matter derived from bats and swallow dirts, litter that falls on enterance of the cave and the organic material carried by the flow of the river. The study on the macrozoobenthos communities of river in Pintu Ngalau Cave has been conducted from October until November 2016. The study used survey method, where stratified random sampling was applied in three zones (light zone, dim zone and dark zone) at study site. Macrozoobenthos samples was collected by surber net. This study also measured the physic-chemical of water. The results showed the composition of macrozoobenthos in the Pintu Ngalau cave river consisted of 43 genera i.e Gastropods (2 genera), Hirudinea (2 genera), Insects (36 genera) and Oligochaetas (3 genera). Total density of macrozoobenthos in this site was 2100 ind/m2 and the highest density was found in dark zone. The highest total relative density (KR total=79,89%) on genus level at every zone was Hydropsyche. Diversity index of macrozoobenthos was classified as medium (H'=2.68) with evenness distribution was evenly (E=0.61) and no dominant genus (C=0.14). The existence of macrozoobenthos was not influenced by light intensity, but instead was more influence by the condition of the substrate and the flow of water in the cave.

Fine structure of the retina of the giant scallop, Placopecten magellanicus

1984 ◽  
Vol 42 ◽  
pp. 312-313
Author(s):  
C.V.L. Powell
Keyword(s):  
Fine Structure ◽  
Electron Microscope ◽  
Light Intensity ◽  
Scanning Electron Microscope ◽  
Eye Development ◽  
Preliminary Observation ◽  
Columnar Epithelium ◽  
Placopecten Magellanicus ◽  
Environmental Light ◽  
Scanning Electron

The overall fine structure of the eye in Placopecten is similar to that of other scallops. The optic tentacle consists of an outer columnar epithelium which is modified into a pigmented iris and a cornea (Fig. 1). This capsule encloses the cellular lens, retina, reflecting argentea and the pigmented tapetum. The retina is divided into two parts (Fig. 2). The distal retina functions in the detection of movement and the proximal retina monitors environmental light intensity. The purpose of the present study is to describe the ultrastructure of the retina as a preliminary observation on eye development. This is also the first known presentation of scanning electron microscope studies of the eye of the scallop.

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