Host range and saprophytic competence of Sinorhizobium meliloti — a comparison of strains for the inoculation of lucerne, strand and disc medics

2005 ◽  
Vol 45 (3) ◽  
pp. 209 ◽  
Author(s):  
R. A. Ballard ◽  
J. F. Slattery ◽  
N. Charman
Keyword(s):  
Sinorhizobium Meliloti ◽  
Effective Strain ◽  
South Australia ◽  
Colony Growth ◽  
Field Trials ◽  
Plant Hosts ◽  
Medicago Littoralis ◽  
Inoculant Strain ◽  
The Media ◽  
Annual Medics

Strains of Sinorhizobium meliloti were compared for their saprophytic competence (ability to survive and colonise) in mildly acidic (pHCa 4.8–5.4) soils, using a ‘cross-row’ technique at 3 field locations in the south-east of South Australia. Some strains of rhizobia had greater saprophytic competence than others. Strain WSM879 performed consistently well, nodulating 36% of lucerne seedlings (mean of 3 sites and 4 sampling regions) compared with former inoculant strain WSM826 which nodulated 27% of lucerne seedlings. At one site, strain WSM879 was compared with the former and current Australian inoculant strains (WSM826 and RRI128, respectively). Here, all 3 strains nodulated a similar percentage of lucerne seedlings. However, the addition of 5 t/ha of lime to the soil at this site increased the percentage of lucerne plants nodulated from 23 to 43%. This increase was due to a combination of better strain survival and colonisation and indicates there remains some potential to further improve these aspects of strain performance. The growth of 4 of the rhizobial strains from the field trials was measured on acidified agar media (between pH 4.0 and 7.5). There was virtually no colony growth (<10% of growth at pH 7.0) by strains WSM826, RRI128 and WSM879, at or below pH 6.0. Although strain MSUR52a was still able to grow (40% of potential) at pH 6.0 (in the absence of aluminium) this was not always reflected in better nodulation of lucerne seedlings by this strain in the field. Inclusion of aluminium in the media increased the sensitivity of the strains to acidity. The ability of 6 selected S. meliloti strains to form effective symbioses with 15 plant hosts (from Medicago sativa, Medicago littoralis and Medicago tornata) was compared. All S. meliloti strains formed effective symbioses with all plant hosts. Overall, strain RRI128 was the most effective strain with both the lucernes and the annual medics, resulting in shoot weights similar to those of plants supplied with mineral nitrogen.

PENGEMBANGAN MULTIMEDIA PEMBELAJARAN MATA KULIAH PENGETAHUAN ALAT PENGOLAHAN DAN PENYAJIAN MAKANAN PROGRAM STUDI TATA BOGA

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Theodora Aruan ◽  
Abdul Hamid K ◽  
Samsidar Tanjung
Keyword(s):  
Small Group ◽  
Food Processing ◽  
Field Trials ◽  
Learning Design ◽  
Study Program ◽  
Processing Program ◽  
The Media ◽  
The Subject ◽  
Two Stages ◽  
Program Knowledge

Abstrak: Penelitian ini bertujuan untuk: (1) mengembangkan multimedia pembelajaran pada mata kuliah Pengetahuan Alat Pengolahan dan Penyajian Makanan yang layak digunakan pada mahasiswa program studi Tata Boga. (2) mengetahui efektifitas multimedia pembelajaran pada mata kuliah Pengetahuan Alat Pengolahan dan Penyajian Makanan program studi Tata Boga. Penelitian menggunakan model pengembangan produk Borg and Gall yang dipadu dengan model desain pembelajaran dari Dick and Carey. Metode penelitian ini terdiri dari dua tahapan, yang mana pada tahap I merupakan tahap uji coba produk yang terdiri dari: (1) validasi ahli desain pembelajaran, (2) validasi ahli materi pelajaran, (3) validasi ahli media pembelajaran, (4) uji coba perorangan, (5) uji coba kelompok kecil, dan (6) uji coba lapangan terbatas. Hasil penelitian menunjukkan: (1) uji ahli desain pembelajaran berada pada kualifikasi sangat baik (82,17%), (2) uji ahli materi berada pada kualifikasi sangat baik (89,5%), (3) uji ahli media berada pada kualifikasi sangat baik (85%), (4) uji coba perorangan berada pada kualifikasi sangat baik (87%),  (5) uji coba kelompok kecil berada pada kualifikasi sangat baik (86%), dan (6) uji coba lapangan terbatas berada pada kualifikasi sangat baik (83,8%). Kata Kunci: multimedia, pembelajaran, pengetahuan alat pengolahan dan penyajian makanan Abstract: This study aims to: (1) develop learning multimedia in the subject of Knowledge Processing and Presentation Tools that are suitable for use in culinary study program students. (2) knowing the effectiveness of learning multimedia in the subject of Food Processing and Food Processing Program Knowledge and Processing Tools. The study used the Borg and Gall product development model combined with learning design models from Dick and Carey. This research method consists of two stages, which in stage I is the product testing phase which consists of: (1) validation of learning design experts, (2) expert material validation, (3) validation of learning media experts, (4) test try individuals, (5) small group trials, and (6) limited field trials. The results showed: (1) the learning design expert test was in very good qualification (82.17%), (2) the material expert test was in very good qualification (89.5%), (3) the media expert test was in the qualification very good (85%), (4) individual trials are in very good qualifications (87%), (5) small group trials are in very good qualifications (86%), and (6) limited field trials are at very good qualification (83.8%). Keywords: multimedia, learning, knowledge of processing and serving food

scholarly journals Pengembangan Media Pembelajaran Fisika Berbasis Frezi pada Materi Usaha dan Energi

2019 ◽  
Vol 2 (2) ◽  
pp. 217-226
Author(s):  
Fira Amanta ◽  
Indra Gunawan ◽  
Wan Jamaluddin
Keyword(s):  
High School ◽  
Junior High School ◽  
Junior High ◽  
Field Trials ◽  
School Level ◽  
Average Score ◽  
Expert Assessment ◽  
High School Level ◽  
Physics Learning ◽  
The Media

Abstract: This study aims to produce products through the development of Frezi-based physics learning media on business materials and energy at the VIII grade of junior high school level, knowing the feasibility of the media according to the validators and knowing the responses of students to the media. This research is R & D research. The types of data produced are quantitative and qualitative data which are analyzed by the guideline of assessment criteria to determine product feasibility. This study resulted in Frezi-based learning media products on business materials and energy at the junior high school class VIII the final product produced had shown to be very feasible with an average score of material expert assessment 81%, media experts with an average score of 80%. learning media obtained in small group trials are very good with an average score of 87%. In the field trials obtained very good criteria with an average score of 88.33%. This frezi-based physics learning media has been qualified to use as a learning mediaAbstrak: Penelitian ini bertujuan untuk menghasilkan produk melalui pengembangan media pembelajaran fisika berbasis Frezi pada materi usaha dan energi tingkat SMP kelasVIII, mengetahui kelayakan media menurut para validator dan mengetahui respon peserta didik terhadap media. Penelitian ini merupakan penelitianR&D. Jenis data yang dihasilkan adalah data kuantitatif dan kualitatif yang dianalisis dengan pedoman kriteria penilain untuk menentukan kelayakan produk. Penelitian ini menghasilkan produk media pembelajaran berbasis Frezi pada materi usaha dan energi tingkat SMP kelas VIII produk akhir yang dihasilkan telah menunjukan sangat layak dengan skor rata-rata dari penilaian ahli materi 81%, ahli media dengan skor rata-rata 80% Respon peserta didik terhadap media pembelajaran yang diperoleh pada uji coba kelompok kecil yaitu sangat baik dengan skor rata-rata 87%. Pada uji coba lapangan diperoleh kriteria sangat baik dengan skor rata-rata sebesar 88,33%. Media pembelajaran fisika berbasis Frezi ini sudah terkualifikasi digunakan sebagai media pembelajaran.

PENGEMBANGAN MEDIA BELAJAR PJOK PADA MATERI SENAM LANTAI (ARTISTIK)

2020 ◽  
Vol 8 (2) ◽  
pp. 86
Author(s):  
Zulbahri Zulbahri ◽  
Yuni Astuti ◽  
Erianti . ◽  
Pitnawati . ◽  
Damrah .
Keyword(s):  
Research And Development ◽  
Small Group ◽  
Quantitative Data ◽  
Early Stage ◽  
Field Trials ◽  
Development Research ◽  
Initial Product ◽  
Initial Stage ◽  
Stage 4 ◽  
The Media

This research is motivated by the limited development of learning media for the subjects of Physical Education, Sports and Health on floor exercise (artistic) material, especially for schools in the regions. This study aims to produce a learning media product for students and students in learning gymnastics. The subjects or samples of this research were FIK UNP students who attended basic and advanced / learning gymnastics courses with a total of 12 people for small group subject trials and 15 people for field trials. The data used in this research are qualitative and quantitative data. Qualitative data in this study is data obtained through validation from material experts, media experts, while quantitative data in this study were obtained through assessment questionnaires which were analyzed with descriptive statistics.This research was conducted using "Research and Development" (Research and Development), namely the research method used to produce certain products. The model used as a reference is the Borg & Gall development research model with 10 developments, in this study the researcher adopted the following stages: 1) Preliminary Study (research and data collection). 2) Prepare a plan and analyze the media to be made. 3) Initial product development by producing learning media with validation by media experts and material experts. 4) Conduct small group trials. 5) Product Revisions. 6) Conduct field trials. 7) Revise the final product. For this early stage research, it has only arrived at the fourth stage (4), namely the initial stage validation by media experts and material experts. Research results in the form of learning media products for practical material with a score of 3.67 with good criteria and for media with a score of 3.3 with a fairly good category.

Differential tolerance of annual medics, Nungarin subterranean clover and hedge mustard to broadleaf herbicides

1992 ◽  
Vol 32 (1) ◽  
pp. 49 ◽  
Author(s):  
RR Young ◽  
KJ Morthorpe ◽  
PH Croft ◽  
H Nicol
Keyword(s):  
Sodium Salt ◽  
Dry Matter ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Effective Control ◽  
Medicago Littoralis ◽  
Annual Medics ◽  
Seed Yields ◽  
Test Plants ◽  
Degree Of Recovery

The tolerance of 5 species of annual medics (Medicago spp.), Trifolium subterraneum cv. Nungarin, and hedge mustard (Sisymbrium orientale) to a range of post-emergence broadleaf herbicides was tested over 2 years. The least damaging to M. truncatula was 2,4-DB, which provided more consistent and effective control of hedge mustard than the other chemicals tested, including the less expensive tank mix of 2,4-DB + diuron. MCPA amine or sodium salt (300 g a.i./ha), bromoxynil (420 g a.i./ha), and tank mixes containing MCPA amine (150-175 g a.i./ha) severely damaged annual medics, particularly M. truncatula, with flowering delayed by up to 21 days, and dry matter and seed yields often significantly (P<0.05) reduced. Seed yields of most test plants indicated a degree of recovery from herbicide damage assessed visually after 10 days. Hedge mustard was not always as severely damaged by MCPA amine as was M. truncatula. Nungarin subterranean clover and M. aculeata SAD 2356 were more tolerant than the M. truncatula cultivars of MCPA amine, MCPA sodium salt, MCPA tank mixes, and bromoxynil, and less tolerant of 2,4-DB. Medicago littoralis, M. polymorpha and M. laciniata were severely damaged by bromoxynil but were more tolerant of MCPA than M. truncatula.

Influence of cereal cyst nematode (Heterodera avenae) on wheat yields in South Australia

1981 ◽  
Vol 21 (112) ◽  
pp. 516 ◽  
Author(s):  
AD Rovira ◽  
PG Brisbane ◽  
A Simon ◽  
DG Whitehead ◽  
RL Correll
Keyword(s):  
Wheat Variety ◽  
South Australia ◽  
Field Trials ◽  
Cyst Nematode ◽  
Analysis Of Covariance ◽  
Cereal Cyst Nematode ◽  
Heterodera Avenae ◽  
Yield Increase ◽  
Significant Yield ◽  
Yield Responses

Significant yield responses of up to 0.9 t/ha were obtained with the nematicides aldicarb and dibromochloropropane in seven of eleven field trials with the wheat variety, Condor. Both nematicides reduced the numbers of white cysts of Heterodera avenae on the roots of wheat. With aldicarb the increase in wheat yields varied directly as the decrease in white cysts: dibromochloropropane gave similar increases in yield as aldicarb with a greater reduction in cyst numbers. There was no yield increase with either nematicide when cereal cyst nematode was not present. An analysis of covariance indicated that over all the sites 64% of the increase in yield due to aldicarb could be explained in terms of cysts of cereal cyst nematode.

Effect of glyphosate on the establishment, growth and nodulation of 14 pasture legume cultivars

1985 ◽  
Vol 25 (2) ◽  
pp. 347 ◽  
Author(s):  
WM Blowes ◽  
KJ Schmalzl ◽  
SM Jones
Keyword(s):  
Adverse Effect ◽  
Adverse Effects ◽  
South Australia ◽  
Subterranean Clover ◽  
Field Trials ◽  
High Rate ◽  
Rapid Absorption ◽  
Seed Placement ◽  
Pasture Legume ◽  
Topsoil Layer

In field trials carried our in 1983 at Gama and Horsham (Victoria), Hart (South Australia) and York (Western Australia), the effect of two rates of glyphosate (0.54 and 1.08 kg/ha active ingredient), applied 1-8 days before sowing, on the establishment, growth and nodulation of four cultivars of subterranean clover and 10 medic cultivars was investigated. No significant adverse effects were observed on establishment, growth or nodulation even at the high rate (2x field rate) of glyphosate. The absence of any adverse effect was attributed to rapid absorption and inactivation of glyphosate in soil and possibly also the manner of seed placement below the glyphosate-treated topsoil layer.

Aboriginal Studies at Year 12 in South Australia and Northern Territory

1989 ◽  
Vol 17 (5) ◽  
pp. 21-26
Author(s):  
Adele Pring
Keyword(s):  
Aboriginal People ◽  
South Australia ◽  
Northern Territory ◽  
Aboriginal Communities ◽  
The Media ◽  
Media Form ◽  
Senior Secondary

Aboriginal Studies is now being taught at Year 12 level in South Australian schools as an externally moderated, school assessed subject, accredited by the Senior Secondary Assessment Board of South Australia.It is a course in which students learn from Aboriginal people through their literature, their arts, their many organizations and from visiting Aboriginal communities. Current issues about Aborigines in the media form another component of the study.

PENGEMBANGAN MEDIA BERBASIS SOFTWARE ARCGIS UNTUK MENINGKATKAN MOTIVASI BELAJAR MAHASISWA PENDIDIKAN ILMU PENGETAHUAN SOSIAL PADA MATERI PETA UNIVERSITAS ISLAM NEGERI MAULANA MALIK IBRAHIM MALANG

2016 ◽  
Vol 3 (1) ◽  
pp. 13
Author(s):  
Ninja Panju Purwita ◽  
Ulfah Muhayani ◽  
Darma Nurfianto ◽  
Achmad Hadi Alfian
Keyword(s):  
Field Tests ◽  
Field Testing ◽  
Field Trials ◽  
Second Phase ◽  
Digital Map ◽  
Second Stage ◽  
The Media ◽  
Media Learning ◽  
Map Function ◽  
Academic Year

<p>Advancement in science and technology have enormous influence in the field of education. The media is one of tool that has an important role so that learning becomes more attractive, have variation and not boring. Making ArcGIS software-based media in learning how to create a digital map function shows the image and informations  contained in the map so that students can understand well. The purpose of this study   are:</p><p>(1) Describe the procedures for developing ArcGIS software media learning IPS mapmaterial. (2) To determine the extent of ArcGIS software can improve the results of student motivation. The data in this development was obtained from the initial trials through expert validation results media and subject matter experts. Then, the data is retrieved from field trials in the form of a questionnaire to 10 students. After that, the data was obtained from the questionnaire results of the field test to the class C in academic year 2013 major in Social Education UIN Maulana Malik Ibrahim Malang. The results of questionnaire before media was revised in field trials at 76%. While the results of questionnaire after media was revised in field trials at 83%. The results of questionnaire before media was revised in field testing at 80%. While the media after result was revised in field tests at 96%. The second stage shows the percentage of 85% and 84%. While the second phase material comprehension test showed results of 81% and 76%.</p><p><strong>Keywords: </strong><em>ArcGIS software, digital map</em></p><p><em> </em></p>

Field-based comparison of platinum and wax impregnated graphite redox electrodes

Soil Research ◽  
1995 ◽  
Vol 33 (3) ◽  
pp. 415 ◽  
Author(s):  
DL Biddle ◽  
DJ Chittleborough ◽  
RW Fitzpatrick
Keyword(s):  
South Australia ◽  
Sampling Period ◽  
Field Trials ◽  
Redox Potentials ◽  
Pt Electrodes ◽  
Inert Electrode ◽  
Average Rainfall ◽  
Using Data ◽  
Redox Electrodes

An inert electrode was constructed using wax-impregnated graphite (WIG) as an alternative to Pt for permanent installation in the regolith. The performance of WIG electrodes has not previously been systematically evaluated by using data from field trials, although Pt and WIG measure similar Eh values in laboratory solutions. We compared the performance of the WIG electrode when installed adjacent to Pt redox electrodes in the A, B and C horizons of duplex soils in a X-eralf-Aqualf toposequence near Mount Crawford in the Mt Lofty Ranges, South Australia. Lower potentials, commonly in the order of 200 mV, were measured from WIG electrodes, relative to Pt electrodes. Measurements of potential from adjacently installed WIG and Pt electrodes did not show significant correlation. Generally oxidizing redox potentials were measured in all soils in which electrodes were installed due to below average rainfall during the sampling period. Further testing of WIG electrodes in reduced regolith is needed. Interpretation of Eh trends, measured using Pt electrodes, between the A, B and C horizon are presented.

Field performance of tomato varieties resistant to root-knot nematodes

1982 ◽  
Vol 22 (117) ◽  
pp. 357 ◽  
Author(s):  
GR Stirling ◽  
MF Wachtel
Keyword(s):  
Sweet Corn ◽  
South Australia ◽  
Field Performance ◽  
Nematode Resistance ◽  
Field Trials ◽  
Root Knot Nematode ◽  
Root Knot Nematodes ◽  
Tomato Variety ◽  
Resistant Varieties ◽  
Susceptible Tomato

The performance of 15 potentially useful nematode-resistant tomato varieties (Ace Hy, Better Boy, Bigset, Bonus, Calmart, Magnifico, Monte Carlo, Patriot, Red Supreme, Rich Reward, Surprise, Terrific, VFN Bush, VFN 8 and Vine Ripe) was assessed in field trials at Loveday and Loxton, South Australia. All varieties showed some nematode resistance when grown in sites heavily infested with root-knot nematodes (Meloidogyne javanica) and most produced yields which were not significantly less than the commonly used susceptible varieties (Burnley Gem, Floradade, Grosse Lisse and Q3) grown in soil treated with nematicides. However, the nematode-resistant varieties were of limited value commercially because the fruit was either susceptible to cracking or too soft to be transported long distances. In glasshouse tests, biotypes of root-knot nematode capable of attacking resistant varieties were not observed. All resistant varieties exhibited resistance against populations of M. javanica from grape, peach, sweet corn, tomato (variety Floradade), tomato (variety VFN Bush), and against field populations of Meloidogyne from both resistant and susceptible tomato varieties. These results suggest that agronomically acceptable nematode-resistant varieties would be useful in management programs to control root-knot nematodes in the Murray Valley.

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