Alida Lubis
Universitas Sumatera Utara

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EFFECT OF CRAB SHELL POWDER ON SOIL PH AND AL-DD ON ULTSIOL Rais, Muhammad; Lubis, Alida
Jurnal Agroekoteknologi Vol 5, No 1 (2017)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jaet.v5i1.14943

Abstract

This research was conducted at the Laboratory of Chemistry and Soil Fertility Faculty of Agriculture, University of North Sumatra, Medan in March 2016 to May 2016. This research aims to establish the incubation period and determine the best dosage application crab?s shell powder to increase the soil pH and aluminum adsorption in increasing available soil P on Ultisol. This research used non factorial randomized block design with three replications. Factor dosage ofcrab?s shell powder with eight treatments (0; 0.58; 1.08; 1.62; 2.16; 2.70; 3.24 and 3.78 tonnes/ha). The results of this researchhas shown that the incubation periods was significantly different inexchanging soil pH and AlddUltisol with application crab?s shell powder at 2 weeks of incubation. The best dosage of crab shell powder on soil pH, Aldd and soil available P (3.24 tonnes/ha). Application crab shell powder add C - organic soil although not significantly different at Ultisol.
PENENTUAN JENIS MINERAL LIAT ALOFAN TANAH ANDISOL DI DESA DOLAT RAKYAT KECAMATAN TIGA PANAH KABUPATEN KARO Simamora, Jupri; Marpaung, Purba; Lubis, Alida
Pertanian Tropik Vol 2, No 3 (2015)
Publisher : Pasca Sarjana FP USU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (434.742 KB)

Abstract

The aim of the research was to determinate type of Allophane minerals by means of Thermogram and to know type of Allophane minerals with Allophane–Organic Matter relations. The research was done in Dolat Rakyat villages, District of Tiga Panah Karo Regency, In Soil Fertility Laboratory University of North Sumatera, and College of Chemical Industry (PTKI), Medan in June - October 2014. Soil type is Andisol. The result of the research in Dolat Rakyat Village Tiga Panah District, Regency of Karo Thermogram interpretation showed that type of Allophane minerals Andisol that is Allophane B. Allophane-Organic Matter relations showed that type of Allophane minerals is Allophane B with positive relations between Allophane-Humic Acid; negative relations between Allophane-Fulvic Acid, and Allophane-Humic Acid+Fulvic Acid.Key Word : Allophane, Andisol, Organic Matter