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All Journal AGROEKOTEKNOLOGI PERTANIAN TROPIK
kemala sari lubis
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Agriculture, Biological Sciences & Forestry

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Journal : AGROEKOTEKNOLOGI

 1 
Kajian Jumlah Biji Basah dan Berat Bji Basah Kopi Robusta (Coffea robusta Lindl.)Pada Beberapa Ketinggian, Kemiringan Lereng dan Jenis Tanah di Kecamatan Silima Pungga-Pungga Kabupaten Dairi Syahputra Abadi Sembiring; posma marbun; kemala sari lubis
Jurnal Agroekoteknologi Vol 4, No 1 (2016)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (256.477 KB) | DOI: 10.32734/jaet.v4i1.12342

Abstract

The purpose of reviewing robusta coffee (Coffea robusta Lindl.) production at some height, slope, and soil type in Silima Pungga-Pungga regency of Dairi. After overlaying map of ground tipe, elvation, and slope it was found 18 SPT (set of land)  with the scale  1 : 25.000. The population of the research is coffee tree in the study field. Sum of point of sampling for coffee trees are 540 sample points. The result of data analysis showed the higest sum of ripe seed coffee production at Great Group Hydrudands as SPL (set of land) 12 and the lowest sum of ripe seed coffee production at Great Group Kadiudults as  SPL 1. The highest weight production of ripe seed coffee production at Great Group Hydrudands as SPl (set of land) 12 and the lowest weight production of ripe seed coffee production at Great Group Kadiudults as  SPL 1. Keywords : height, slope, soil type, coffee production
Evaluasi Sifat Fisik Tanah Terhadap Laju Infeksi Ganoderma di Perkebunan Kelapa Sawit (Studi Kasus : PT. PD. PATI) Kartika Utami; Supriadi Supriadi; Kemala Sari Lubis
Jurnal Agroekoteknologi Vol 4, No 3 (2016)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (764.297 KB) | DOI: 10.32734/jaet.v4i3.13385

Abstract

Penyakit busuk pangkal batang (Ganoderma sp.) menurunkan produktifitas kelapa sawit di perkebunan kelapa sawit PT. PD. PATI. Perbaikan kondisi lingkungan tanah perlu dilakukan agar wilayah perakaran hingga pangkal batang dapat terhindar dari penyakit ini.  Penelitian ini bertujuan untuk mengevaluasi sifat fisik tanah antara lain persentase fraksi liat, fraksi pasir, kelembaban tanah, dan kandungan karbon organik tanah terhadap laju infeksi penyakit busuk pangkal batang. Penelitian dilakukan di perkebunan kelapa sawit PT.PD.PATI dengan metode survey. Sampel diambil dengan metode proportional purposive random sampling. Data diuji dengan asumsi data klasik, analisis korelasi dan analisis regresi. Hasil penelitian menunjukkan laju infeksi penyakit busuk pangkal batang dipengaruhi oleh kelembaban tanah tetapi tidak dipengaruhi oleh fraksi liat, debu dan kandungan karbon organik tanah.
Co-Authors Ida Ayu Putu Sri Widnyani Kartika Utami Posma Marbun Suhardi, Silvira Supriadi Supriadi Syahputra Abadi Sembiring Zulkifli Nasution