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All Journal Jurnal Agroteknos Agroista: Jurnal Agroteknologi
Candra Ginting
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Journal : Agroista: Jurnal Agroteknologi

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INCREASING LATEX PRODUCTION OF RUBBER TREE (Hevea brasiliensis) BY NUTRIENT INFUSION Candra Ginting; Yohana Theresia Maria Astuti
AGROISTA : Jurnal Agroteknologi Vol. 1 No. 2 (2017): NOVEMBER
Publisher : Program Studi Agroteknologi INSTIPER

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (266.184 KB) | DOI: 10.55180/agi.v1i2.17

Abstract

Penelitian bertujuan untuk mengetahui pengaruh pemberian nutrisi secara infus pada batang karet terhadap produksi latex. Penelitian dilaksanakan di Perkebunan karet milik PTPN VIII di Garut, Tasikmalaya pada bulan April sampai Agustus 2015. Larutan nutrisi terdiri dari unsur ara makro dan mikro yaitu: N-NH2 + : 0,2 %, N-NO3 - : 2,3 %, P2O5 total: 1,0%, total K2O : 2,4%, total Ca : 0,08 %, total Mg : 0,07 %; total SO4 2- : 0,28 %.; total Fe :67,9 mg.kg-1 , total Cu : 28,9 mg.kg-1 , total Mn : 38,7 mg.kg-1 , total Zn : 16,4 mg.kg1 . Larutan nutrient diencerkan 100 x sebelum aplikasi, dengan nilai electrical conductivity 3,83 mS/cm dan pH 5,52. Larutan tersebut diaplikasikan dengan cara infus batang karet. Hasil yang diperoleh menunjukkan adanya peningkatan berat latex dan kadar karet kering. Tanaman karet yang telah mengalami kering sadap akibat penggunaan stimulan sebelumnya, setelah dilakuakan aplikasi infus nutrisi, dapat memproduksi latex kembali.
PERKEMBANGAN FRUIT SET TANDAN KELAPA SAWIT (Elaeis guineensis Jacq.) DENGAN PERLAKUAN BERBAGAI FORMULA HARA Candra Ginting; Muslim Panjaitan
AGROISTA : Jurnal Agroteknologi Vol. 2 No. 1 (2018): MEI
Publisher : Program Studi Agroteknologi INSTIPER

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (197.057 KB) | DOI: 10.55180/agi.v2i1.26

Abstract

The production of bunches fruit set in the palm oil is influenced by several factors such as water, nutrients and pollination. Sex ratio of an oil palm tree is affected by both genetic and environmental factors. Male and female inflorescences development are influenced by nutrients. The research was conducted with seven treatments nutrient formula for seventy stand to know fruit set development of oil palm. The number of male and female inflorescences have been calculated three months after fertilizer application. Increasing in male and female inflorescences as effect of several treatments of nutrient formula. Change in sex ratios to average 0,4 after treatments from 0.5 before. Productivity potential of fresh fruit bunch in communal or population increased with application of nutrient formula. Keywords: fruit set, sex ratio, male and female inflorescences, nutrient formula
PRODUKTIVITAS KEBUN KELAPA SAWIT DENGAN APLIKASI BERBAGAI KOMBINASI PUPUK DAN JANJANG KOSONG PADA LAHAN PASIRAN Candra Ginting; Dino Prasetio
AGROISTA : Jurnal Agroteknologi Vol. 3 No. 1 (2019): MEI
Publisher : Program Studi Agroteknologi INSTIPER

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (250.02 KB) | DOI: 10.55180/agi.v3i1.47

Abstract

The main problem of sandy soils is low water holding capacity, resulting an occurance of water deficit. To overcome the problem, application of empty fruit bunch (EFB) is important. EFB application increases growth and development of fruit set and productivity, which causes an increase of palm oil absorbing ability to nutrients. Therefore, increasing potential effectivity of fertilizer in sandy soil is needed. Applying of EFB 79 to 268 kg.plant-1 .year-1 combine with inorganic fertilizer 2.8 to 6.0 kg.plant-1 .year-1 increased productivity simultaneously in years. Results showed that fertilizer application was more effective when applied under the heap of EFB, particularly in sandy soils. Keyword: empty fruit bunch, sandy soils, productivity, fruit set, inorganic fertilizer.
Co-Authors Dino Prasetio DIRVAMENA BOER Muslim Panjaitan Teguh Wijayanto WA ODE AFU Yohana Theresia Maria Astuti