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All Journal Agromet Bumi Lestari Teknotan: Jurnal Industri Teknologi Pertanian Journal of Tropical Soils Jurnal Keteknikan Pertanian Forum Geografi SAINS TANAH - Journal of Soil Science and Agroclimatology Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Jurnal Agrotek Tropika Jurnal Agrotropika Jurnal Pengabdian Masyarakat Indonesia Jurnal Pengabdian Fakultas Pertanian Universitas Lampung
Tumiar Katarina Manik
Faculty Of Agriculture, University Of Lampung
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Energy Engineering Environmental Science Public Health Social Sciences Other

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Journal : Agromet

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ANALISIS DERET WAKTU CURAH HUJAN UNTUK MENGKAJI PERUBAHAN IKLIM DI DAERAH TANGKAPAN AIR PROPINSI LAMPUNG TIME SERIES ANALYSIS OF RAINFALL TO STUDY CLIMATE CHANGE IN WATERSHED AREA, LAMPUNG PROVINCE Tumiar Katarina Manik
Agromet Vol. 23 No. 1 (2009): June 2009
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (254.824 KB) | DOI: 10.29244/j.agromet.23.1.61-70

Abstract

One important climate factor for tropical area is rainfall. Changes in rainfall pattern will cause numerous problems especially in agricultural activities. Rainfall pattern could also lead to either flood or drought; problems which will not only affect agricultural activities but also socio-economic situation of broad community. Therefore, study of local climate variability focusing on rainfall related to the global warming is important. Time series analysis ( correlogram and periodogram) of daily rainfall was chosen to investigate the phenomena of global warming in local scale. Data (1974-2004) was collected from Sumberjaya, Air Hitam and Fajar Bulan; three stations located inside one of the important watershed in Lampung Province. From the collelogram, in general daily rainfall in this upland and forest area shows independency up to the year of 1990. No seasonal pattern could be an indicator that rains in this area are controlled more by local topography and land cover condition then by larger scale of climate system such as monsoon. After 1990 there were some weak sign of seasonal pattern. This could be interpreted as a sign that larger climate system started influence the local rainfall and as the global warming increases, it could be predicted that local rainfall pattern will be controlled more by the larger climate system. The periodogram shows that rainfall in this area has weak annual periodic. Data from Sumberjaya on 1990-1994 and 1999-2006 showed that annual periodic were getting stronger; a sign that larger climate system started dominating the area.
Effect of Rainfall Intensity on Glyphosate Herbicide Effectiveness in Controlling Ageratum conyzoides, Rottboellia exaltata, and Cyperus rotundus Weeds Manik, Tumiar Katarina; Saputra, Dwi; Sambodo, Dad Resiworo Jekti
Agromet Vol. 34 No. 1 (2020): JUNE 2020
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (280.347 KB) | DOI: 10.29244/j.agromet.34.1.11-19

Abstract

Glyphosate is one of herbicide active ingredient which is mostly used to control weeds in crops. However, in rain season herbicide effectiveness decreases as it is washed by rain. This research aimed to study effect of rainfall intensity on the effectiveness of herbicide (Round up 486 SL 2.5 l/ha.) with isopropilamina glyphosate as the active ingredient in controlling specific weeds Ageratum conyzoides, Rottboellia exaltata, and Cyperus rotundus. The experiment was consisted of six treatments and arranged in randomized block design with 8 replications. The treatments were level of rain intensity which were 5 mm/hour, 10 mm/hour, 20 mm/hour, 40 mm/hour, no rain and control (no herbicide no rain). Rainfall intensity was determined by conducting simulation trials prior to the treatments and applied 30 minutes after herbicide applications. The results showed that herbicide effectiveness decreased as the rainfall intensity incresed, even though with longer time the herbicide was still able to control the weeds. The effect of rainfall intensity on herbicide effectiveness was different for different weeds. Up to intensity 40 mm/hour herbicide was capable to control weeds but with level of weeds destruction 20-60%.
Co-Authors , Agustiansyah Agus Karyanto Agus Karyanto Agustiansyah Agustiansyah Agustiansyah Agustiansyah Ardian Ardian Bustomi Rosadi Bustomi Rosadi dwi saputra Eko Pramono Eko Pramono Eva Nurhayati Eva Nurhayati, Eva Fadhilatul Adha Hadi, Muhammad Syamsoel Kukuh Setiawan Mua’ddin Mua’ddin Nelita Aryani Paul B. Timotiwu Paul Benyamin Timotiwu Pusvika, Niluh D. R. Bustomi Rosadi R.A. Bustomi Rosadi Ridho Ernando Rugayah Rugayah Salsabila, Erika Fadia Sambodo, Dad Resiworo Jekti Samsun, Achmad Sanjaya, Purba Setiawan, Wawan A Timotiwu, Paul Benjamin Tundjung Tripeni Handayani, Tundjung Tripeni Widyastuti, R.A Diana Wirastiti, Ni Ketut Yohanes Cahya Ginting Yohanes Cahya Ginting, Yohanes Cahya Yohannes Cahya Ginting