Hubungan Intensitas Penyakit Karat dengan Produktivitas Tanaman Kedelai (Glycine Max (L.) Merr.) pada Beberapa Varietas Berbeda

The severity of plant disease is closely related to the development of the disease itself, including rusts caused by pathogenic fungi. This research aimed to determine the difference of rusts disease severity and to determine the correlation between rusts disease severity with the productivity of different varieties of soybean. The material used was inoculum of rusts pathogenic fungi, Phakopsora pachyrhizi Syd., and four varieties of soybean, i.e., Slamet, Lokon, Bromo, and Ringgit. This research was a split-plot design experimental with subplot was four different varieties of soybean, and the main plot was the control without the treatment of inoculation (In0). The spores suspension density of inoculum of P. pachyrhizi Syd applied was 104 spores/ml (In1). The main parameters observed in this study were the height of plants, the number of pods per plant, the number of seeds per plant, the wet and dry weight of the plant, and the total weight of 100 grains seed. The supporting parameters were the disease severity, the soil acidity, the humidity, and the air temperature. The results showed the plant with lowest rusts disease severity was Slamet variety (18,38%), and the highest was Ringgit variety (35,92%). The correlation test showed the increment of rusts disease severity reduced the number of pods and dry weight of the plant in Lokon variety

Unjuk Kerja Teknik Penyaradan Kayu Dengan Metode Tree Length Logging Pada Hutan Alam Lahan Kering

Di Indonesia, kegiatan pembalakan di hutan alam dilakukan dengan metode pemotongan kayu sepanjang batang bebas cabang dan menyaradnya ke tempat pengumpulan kayu. Pada penelitian ini, dilakukan pengamatan unjuk kerja penyaradan pada metode tree length logging, dimana pemotongan batang dilakukan di atas cabang pertama sampai diameter minimal 20 cm dan panjang minimal 1,30 m, yang dimanifestasikan oleh produkstivitas dan biaya penyaradan. Penelitian dilakukan di 4 areal ijin USAha pemanfaatan hasil hutan kayu pada hutan alam (IUPHHK-HA). Hasil penelitian menunjukkan bahwa produktivitas penyaradan berkisar antara 10,909 - 48,174 m3/jam dengan rata-rata 22,217 m3/jam, tergantung jarak sarad. Sedangkan biaya penyaradan berkisar antara Rp 13.544,14 - Rp 59.810,12/m3 atau rata-rata Rp 28.628,10/m3dengan jarak sarad berkisar antara 100 -25 m

Aktivitas Fosfatase Tanah Dilingkungan Bentang Hutan Alami Dan Non-alami [Phosphatase Activity in Soil Belongs to Natural and Non-natural Forest Landscape]

The spatial dispersal of acid and alkaline phosphates activity in forest soils appears to be controlled by position in the landscape and its soil microbial density. Soil bacteria expressively produced significant level of acid phosphatase in the investigation.The variety of acid phosphatase activity (8.25-37.55 />-nitrophenol.g"'soil.h"') noted higher and followed by alkaline (0.78-7.15 p-nitrophenol.g-'soil.h" ), correspondingly. Acid and alkaline phosphates were exist in both of soil of natural as well as for non-natural forest soil landscape, with the value (po/o=0.6210) of correlation are 0.6889 and 0.6532, respectively. Phosphate Solubilizing Bacteria (PSB) average density in natural forest soil equivalent to 0.61xl0Â colony forming unit (cfu) and total bacteria is 160xl0 cfu, while the PSB in non-natural forest soil is 7.75xl0 cfu and total bacteria is 48.25x10' cfu. Concerning to the forest environment as soil bacteria inhabitants of PSB, there were significantly difference of PSB population in natural and non-natural landscape forest. Forest environment is negatively affect the soil enzymes activities under Pinus maritima and Caliandra calothyrsus as the lowest activities, and to the highest ones under the Schima wallichii and Eucalyptus saligna vegetation

Metode Tutor Sebaya Untuk Meningkatkan Hasil Belajar Matematika Pada Materi Pengolahan Data

By using Methodology of peer tutoring is to increase the result of mathematics study on statistic at sixth grade of elementary school This research is aimed (1) To know the result of mathematics study on tutor methodology (2) To know empirical of the effected of peer tutoring to mathematics study result. The research has been using experiment. The hypothesis result found that, there is deferent between using of tutor and lecture methodology

Holistic Academic Supervision Model for Cultural Art Teachers of Vocational High Schools

This study is aiming at (1) describing and analyzing the current implementation of academic supervision (factual model), (2) generating and analyzing academic supervision model as needed (hypothetical model), and (3) identifying and analyzing the effectiveness of a holistic model of academic supervision (the final model). The method employed in this research was the Research and Development (R&D) method, which was divided into three phases: a preliminary study, stage of development and evaluation stages. The data sources were the school superintendents, teachers, as well as students. Further, the data were collected by conducting interviews, questionnaires, and observations. Results showed that the current implementation of academic supervision was considered less effective. The academic supervision which is considered as appropriate for cultural art teachers is a holistic academic supervision. It involves school superintendents and cultural art teachers who are supervised, starting from the planning stage up to the follow-up stage, so that, a good relationship between them will be established. It is concluded in this study that a holistic academic supervision model is effective to enhance the professional competence of cultural art teachers

Pengaruh Inokulasi Bakteri Terhadap Pertumbuhan Awal Jarak Pagar (Jatropha Curcas L.)

Bacterial inoculants affect the early growth of Jatropha (Jatropha curcas L). Genera ofAzotobacter, Bacillus, Chromobacterium, Citrobacter, Nitrosomonas, Rhizobium, andSpaerotillus natans were soil bacterial isolates. The soil was collected from numerous placesaround Pontianak, West Kalimantan. Those isolates were used as inoculants, and formulatedto single and mixed bacterial inoculants, then used to stimulate the early growth of jatrophaseedling in 15 weeks at greenhouse condition. Bacterial inoculations caused better growthperformance compared to its control as pure soil garden medium without inoculations, andneither to bare soil dresses with compost. In the presence of inoculants, plant height wasaccelerated quickly while other inoculants affected to stalk diameter development. Daily growthperformance of jatropha peaked in 8 and 11 weeks after inoculation of Citrobacter andNitrosomonas bacterial component were used as single inoculant, respectively. The increasingof shoot biomass accumulation was three times as caused by single inoculants (Bacillus sp),and the highest one up to four times of biomass weight caused by a mixture inoculants asconsortium of Azotobacter, Bacillus, and Nitrosomonas spp. That selective inoculant hasopportunity to be used for jatropha farming, and this basic study is meaningful to jatropacultivation for standing to bio-fuel resources.Keywords: Jatropha curcas L., inoculants, Azotobacter, Bacillus, Chromobacterium,Citrobacter, Nitrosomonas, Rhizobium , Spaerotillus natans