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Irsal Irsal
University of North Sumatera
Agriculture, Biological Sciences & Forestry

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Respons pertumbuhan dan produksi tembakau Deli (Nicotiana Tabacum L.) terhadap intensitas dan dosis pemberian pupuk organik Lamhot Gultom; Meiriani Meiriani; Irsal Irsal
Jurnal Agroekoteknologi Vol 5, No 2 (2017)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (337.422 KB) | DOI: 10.32734/jaet.v5i2.15472

Abstract

Penelitian ini bertujuan untuk mengetahui respons pertumbuhan dan produksi tembakau Deli terhadap intensitas dan dosis pemberian pupuk organik. Penelitian dilaksanakan di Kebun PTPN II Bulu Cina, Sumatera Utara pada bulan Maret sampai Mei 2016. Rancangan yang digunakan adalah rancangan acak kelompok faktorial dengan dua faktor. Faktor pertama yaitu intensitas pemupukan dengan dua taraf (2x aplikasi: 10 dan 25 hari setelah pindah tanam (HSPT); dan 3x aplikasi: saat pindah tanam, 10, dan 25 HSPT), faktor kedua yaitu dosis pupuk organik dengan lima taraf (5g; 10g; 15g; 20g; dan 25g per tanaman). Hasil penelitian menunjukkan bahwa intensitas pemupukan 3x nyata meningkatkan pertumbuhan dan produksi tembakau Deli pada bobot basah daun pasir, bobot kering daun pasir dan bobot basah daun kaki 1. Dosis pupuk organik 10 g/tan nyata meningkatkan pertumbuhan dan produksi pada bobot basah daun kaki 1, bobot kering daun kaki 1 dan bobot kering daun kaki 2. Interaksi antara intensitas pemupukan dan dosis pupuk organik terbaik (pada kombinasi intensitas pemupukan 3x dan dosis pupuk organik 10 g/tan) berpengaruh nyata pada bobot basah daun pasir dan bobot kering daun pasir.
The Impact of Rainfall and Rainy Days on Tobacco Crop (Nicotiana tabacum L.) in PTPN II Division of Klumpang Aprianto Aprianto; Ratna Rosanty Lahay; Irsal Irsal
Jurnal Agroekoteknologi Vol 5, No 2 (2017)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (448.022 KB) | DOI: 10.32734/jaet.v5i2.15479

Abstract

This study aims to determine the effect of rainfall and rainy days as well as the correlation of both on Tobacco Crop production in 2012 - 2014 in PTPN II Divisi of Klumpang Hamparan Perak District of Deli Serdang. The analytical method used is multiple linear regression analysis and correlation analysis. The model was tested for feasibility with classic assumption test including normality test, heteroscedasticity test, multicolinearity test, and autocorrelation test by using statistical tools SPSS.v.18 for windows.The results showed that variable rainfall and rainy day have a real effect on alpha 5% (Sig> α 0.05) to increased production of Leaf Tobacco In 2012 - 2014. Correlation results in crop years 2012 - 2014 with two-way analysis at the level of 1% and 5% test showed variable rainfall and rainy days have a strong relationship, real and (positive) direction. Correlation value of rainfall and rainy days in a row is 0.943 (0,005)with a significance value <α 0:01. Variable tobacco production with rainfall and rainy days have a strong relationship but (negative)direction with value correlation -0,926 (0,008) with significance < α 0.01 and -0,811 (0,050) with significance < α 0.05.
Pengaruh Curah Hujan Dan Hari Hujan Terhadap Produksi Kelapa Sawit Berumur 7, 10, Dan 13 Tahun Di Kebun Huta Padang PT. Perkebunan Nusantara III Persero Tengku Sofi Hans Hamdan; Irsal Irsal; Lisa Mawarni
Jurnal Agroekoteknologi Vol 6, No 4,Okt (2018)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (433.676 KB) | DOI: 10.32734/jaet.v6i4,Okt.19112

Abstract

ABSTRACT   Palm oil production depend on the rain and the age composition of plants. The purpose of this research was to determine the effect of rainfall and rainy day as well as the correlation of both on palm oil production in plants aged 7, 10 and 13 years. This research used primary data available in company administration, in the form data of production of fresh fruit bunches (FFB); componen production data as total bunches, average bunches weight, and total of productive trees in 2013, 2014,2015.  Rainfall and rainy days data were taken a year before the production data in 2012, 2013, 2014. Analysis method used are double linier regression and correlation analysis. Model tested by classic asumption consists of normality test, heteroskedasticity test, multicollinearity, and autocorellations test by using statistic software SPSS.v.20 for windows. The result of t-partial test showed that rainfall variable had an effect not significantly on age 7, 10 and 13 years at alpha 5% (Sig > α 0.05). While on rainy day variable showed that rainy day had significant effect at age 7 year at alpha 5% (Sig < α 0.05)  while at age 10 and 13 year rainy day had an effect not real. While on the regression analysis shows that rain fall and rainy day simultaneously variables unsignificanted with  alpha 5% (Sig <α 0.05) to increase the production of FFB at the age of 7, and 10 years. While rain fall and rainy day variables significanted to increase the production of FFB at the age of 13 years. The influence of rainfall and rainy days the FFB production each from ages 7, 10 and 13 years  was 50,4%, 44,7%, and 43,8% influence by other variables not included on the model. Correlation results in plants was 7, 10, and 13 years with two-way analysis test at 1% level showed variable rainfall and rainy days have a strong relationship, and positive direction. Keywords: FFB production, rainfall, rainy day.
Co-Authors Aprianto Aprianto Lahay, Ratna Rosanty Lamhot Gultom Lisa Mawarni Meiriani Meiriani Tengku Sofi Hans Hamdan