Garuda - Garba Rujukan Digital

Kemala Sari Lubis

University of Sumatera Utara

Author-ID : 2980638

Agriculture, Biological Sciences & Forestry

Published : 3 Documents Claim Missing Document

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Articles

Effect Consetration of Mollucicides and Variance of Water Height on Paddy Growth and Population of Golden Snail(Pomacea canaliculata L.)at Paddy Field in Tanjung Mulia Village Tanjung Morawa District Verda Klara Sari Tarigan; Erwin Masrul Harahap; Kemala Sari Lubis
Jurnal Agroekoteknologi Vol 6, No 1, Januari (2018)
Publisher : Universitas Sumatera Utara

Golden snail (Pomacea canaliculata L.) able breed quickly at flood area and hold out at 6-8 weeks at dry condition. Modification of water heights and concetrations of mollucicides are be expected decrease the population of golden snail (Pomacea canaliculata L.). This research was studied at paddy field of Tanjung Mulia Village, Tanjung Morawa District from April 2016 until August 2016. This research used completely randomized design with two factors consist of water heights of paddy field (H) such as, 0 cm; 2,5 cm; 5 cm and consetrations of mollucicides (M) such as, 0 g/15L water;100 g/ 15L water; 300 g/ 15 L water. Combinations treatment are repeated at three times and there are 27 treatments. The results showed the decreasing of water heights at paddy field can decre the population of golden snail (Pomacea canaliculata L.) and dry grain weight brutto; application of mollucicides showed response about golden snail (Pomacea canaliculata L.) and many parameters of rice; combination of decrease water height in paddy field and consetration of mollucicides did not show response about golden snail (Pomacea canaliculata L.) and many parameters of rice. Key words : golden snail, height water, mollucicides

Study of Soil Acidity, Organic Carbon and Texture of Ultisol in Several Vegetation at Durian Baggal, District of Raya Kahean (Case Study: Semi Critical Land in Region Of Sibarau Water-Shed) Rio Andreas Tambunan; Kemala Sari Lubis; Ir Razali
Jurnal Agroekoteknologi Vol 7, No 1,Jan (2019)
Publisher : Universitas Sumatera Utara

Sibarau Sub-Watershed is one of the Sub-Watershed of Padang Watershed. Land area with semi critical criteria in the Sibarau Watershed is 1471.83 hectares or 20% of the total entire Sibarau Watershed critical land area.This research was conducted to analyze and determinecharacteristic of soil physical and soil chemical in semi critical land area at sub-watershed Sibarau Durian Baggal village, Raya Kahean. research area are palm, rubber, mix plant, duku and forestry.The research was conducted at Soil Chemistry and Biology Laboratory and Research and Technology Laboratory of Faculty of Agriculture, University of North Sumatera. The Research Held in July until September 2017.The research was conducted by using survey method of sampling surveys with. Analyzed of soil pH with methods electrometry, soil organic matter with Walkley and Black method, and soil texture with Hydrometer Bouyoucos method. The results showed that on palm land soil acidity was acidic, C-organics very low and texture wasis sandy loam.On rubber land soil acidity was acidic, C-organics low and very low, texture is sandy loam. On mix plant land soail acidty is acidic, C-organics was low til very low and soil texture was sandy loam. On duku land soil acidity was acidic , C-Organics was low and soil texture was sandy loam. On forestry lan soil aciity was medium acidic, C-organics was medium and soil textutre was loamy sandKeywords: soil acidity, organic carbon, texture,semi critical land, sibarau sub-watershed

Study Of Texture, Organic Carbon, and Acidity of Ultisols in Several Vegetations at Gunung Datas Village Raya Kahean Sub District (Case Study: Semi Critical Land Bah Sumbu Sub Watershed) Egiya Muspa Tarigan; Kemala Sari Lubis; Hamidah Hanum
Jurnal Agroekoteknologi Vol 7, No 1,Jan (2019)
Publisher : Universitas Sumatera Utara

Land use at the area of Bah Sumbu Sub Watershed has intensified, causing the decrease of soil organic matter. Land area with criteria critically / semi critically at Bah Sumbu sub watershed area is 8742,949 hectares or 79,41% of the total entire Bah Sumbu Sub Watershed. This research was conducted to study texture, organic carbon and acidity of the soil moderate critical area of land at Bah Sumbu sub Watershed, Gunung Datas , Raya Kahean Subdistrict. The research was conducted by using survey method with soil sampling randomly based on some vegetations and slopes. Soil samples was taken at each vegetation for 3-6 samples. Analyzed of soil pH with methods electrometry, soil organic matter with Walkley and Black method, and soil texture with Hydrometer Bouyoucos method. Based on the results of soil analysis of several land uses in Gunung Datas Village, Bah Sumbu sub-watershed area is known that soil pH is included in very acidic to slightly acidic criteria with acidity range of 3,73 to 5,82. The C-organic content is included in very low to moderate criteria with a range of organic carbon between 0,77% to 2,02%, and the texture is dominant sandy loam soil texture.Keywords: vegetation, texture, pH, organic carbon

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