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All Journal AGRIVITA, Journal of Agricultural Science Social, Humanities, and Educational Studies (SHEs): Conference Series
Yuni Widyastuti
Balai Besar Penelitian Tanaman Padi, Jl. Raya 9, Sukamandi, Subang, Jawa Barat Telp. (0260) 520157, Faks. (0260) 520158
Agriculture, Biological Sciences & Forestry Education Languange, Linguistic, Communication & Media Social Sciences

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PERFORMANCE OF PROMISING HYBRID RICE IN TWO DIFFERENT ELEVATIONS OF IRRIGATED LOWLAND IN INDONESIA Widyastuti, Yuni; Satoto, Satoto; Rumanti, I.A.
AGRIVITA, Journal of Agricultural Science Vol 37, No 2 (2015)
Publisher : Faculty of Agriculture University of Brawijaya and Indonesian Agronomic Assossiation

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Abstract

The hybrid rice program has been established since early 1990’s at the Indonesia Center for Rice Research (ICRR). Twenty-four experimental hybrid rice varieties which have been developed were tested in lowland rice fields in Sukamandi (West Java) and Batang (Central Java) during the dry season and the rainy season of 2012. Randomized complete block design (RCBD) with three replications was used in each location. The results showed that grains yields were affected by locations, seasons, and genotypes. The genotypes x locations x seasons interaction effect was significant; therefore, the best hybrid was different for each location and season. A7/PK36 hybrid has the best performance in Batang during the dry season, while A7/PK40 and A7/PK32 are the best hybrids in the rainy season. In Sukamandi, nine hybrids were identified as better yielder than that of the check cultivar in the dry season, but not so in the rainy season. Using the correlation and path analysis, we found that the number of panicles per hill and the number of filled grains per panicle could be used as selection criteria for yield in hybrid rice. Keywords: agronomic performance, correlation, hybrid rice, lowland 
YIELD STABILITY OF NEW HYBRID RICE ACROSS LOCATIONS Satoto, Satoto; Rumanti, Indrastuti Apri; Widyastuti, Yuni
AGRIVITA, Journal of Agricultural Science Vol 38, No 1 (2016): FEBRUARY
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v38i1.675

Abstract

The adaptation of hybrid rice varieties mostly are in specific location and season, but there are some of the varieties have a wide adaptation then adopted by the farmer in the large area. Replicated yield trials were conducted to study the stability of hybrid rice yield and identify the best location to optimize their yield per ha. We have conducted the trials in three location such as Sukamandi, Salatiga and Malang during two seasons in 2011. We are analyzing data across location and season  using AMMI and Eberhart Russel methods. The AMMI analysis showed that the  IR79156A/PK88 was adaptable to favorable environments but unstable. This hybrid is always performing well and produce the higher yield compare to check variety. Some of other hybrids  were good only in specific location, i.e. IR62829A/BP2280-1E-12-22 and IR58029A/BP2 280-1E-12-22. Those hybrids produced higher yield in Salatiga and Malang, respectively. Seem to AMMI analysis, the result of Eberhart and Russells method also showed that IR79156A/PK81  was the best hybrid with regression slope (b) around 1 with the yield average higher than average of all hybrids. It indicated that this hybrid has a wide adaptation and probably can be cultivated in the wider ecosystem.
Improving the Quality of Thematic Learning through the Discovery Learning Model in Class V SDN Legok Kebasen Students Widyastuti, Yuni
Social, Humanities, and Educational Studies (SHEs): Conference Series Vol 3, No 3 (2020): Social, Humanities, and Educational Studies (SHEs): Conference Series
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (165.849 KB) | DOI: 10.20961/shes.v3i3.45868

Abstract

The background of this research is the low quality of thematic learning and the use of less varied methods. The aim of this Classroom Action Research is expected to improve the quality of thematic learning through the Discovery Learning model for fifth grade students of SDN Legok Kebasen. This Classroom Action Research was conducted in 2 cycles, each cycle consisting of four stages, namely planning, implementing, observing and reflecting. The implementation of the action uses the Discovery Learning model with a systematics of initial activities, core activities and final activities. The results showed that students' learning completeness increased from 47.62% in the initial study to 66.67% in the first cycle and 90.48% in the second cycle. Student activity also increased from 23.86 in the initial study to 24.95 in the first cycle and 27.38 in the second cycle. The class average increased from 61.43 in the initial study to 70.00 in the first cycle and 75.24 in the second cycle. From the research results it can be concluded that the application of the Discovery Learning model can improve the quality of learning.
Co-Authors I.A. Rumanti Indrastuti Apri Rumanti Satoto Satoto Satoto Satoto