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All Journal Jurnal Penelitian Kelapa Sawit
Dhimas Wiratmoko
Indonesian Oil Palm Research Institute
Agriculture, Biological Sciences & Forestry

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PENGHITUNGAN INDEKS VEGETASI CITRA WORLDVIEW-2 UNTUK ESTIMASI PRODUKSI KELAPA SAWIT Dhimas Wiratmoko; Hartono Hartono; Sigit Heru Murti BS
Jurnal Penelitian Kelapa Sawit Vol 24 No 3 (2016): Jurnal Penelitian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1499.494 KB) | DOI: 10.22302/iopri.jur.jpks.v24i3.17

Abstract

Remote sensing application that used integrated with environmentally factors for oil palm yield estimating using Worldview-2 Imagery vegetation index (VI) was done. The aims of this study to get : 1) Red Edge Normalized Different Vegetation Index (RENDVI) and C h l o r o p h y l l I n d e x R e d E d g e ( C IRE ) ; 2) Correlation both of VI and oil palm yield; 3) oil palm yield estimation. The methods that used in this study were VI calculation by using RENDVI [(λNIR -λRED EDGE)/(λNIR +λRED EDGE )] and CIRE = [(λNIR /λRED EDGE )-1]. Oil EDGE NIR RED EDGE NIR RED EDGE palm yield estimation done by using linier regression and multiple linier regression. Linier regression used oil palm yield as dependent factor (Y) and VI as independent factor. Multiple linier regression used oil palm yield as dependent factor (Y), vegetative factors (oil palm yield, population per hectars, leaf area index) and environmentally factor (% clay, soil fertility index, altitude and water balance) as independent factors. The results of this study were: 1) the RENDVI value range -1 to 0.493 with average 0.30; while the CIRE value range -1 until 1.845 with average value 0.85. 2) The RENDVI dan CIRE have low positive linier correlation with oil pal yield rendah (rRENDVI = 0.355 dan rCIRE = 0.354); 3) Oil palm RENDVI CIRE yield estimation that using RENDVI and CIRE , vegetatation factors, environmentally factors data integration have similar correlation (r=0.763). Overall estimation model accuration get more than 90% estimation accuration on current month.
Kesuburan Tanah, Pertumbuhan dan Produktivitas Tanaman Kelapa Sawit (Elaeis guineensis) pada Tiga Kedalaman Mineral Pirit Edy Sigit Sutarta; Dhimas Wiratmoko; Erwin Nyak Akoeb
Jurnal Penelitian Kelapa Sawit Vol 28 No 2 (2020): Jurnal Penelitian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iopri.jur.jpks.v28i2.104

Abstract

Acid sulfidic land is one of the marginal land that has been used for oil palm development. Low soil acidity (pH) and high content of Al and Fe are limiting factors for oil palm development in this area. Oil palm yield in this area was very limited and could not reach the standard of oil palm productivity in mineral soils. The objectives of this study were mapping the pyritic depth distribution, and observing the soil fertility on three pyritic depth (40 – 60 cm, 60 - 90 cm, and >90 cm). The results of this study showed that Paya Rambe plantation had varied pyritic depths, between 40-110 cm. The shallow pyritic depth was found along the river to the sea estuary. Shallow pyritic depth soil has lower soil fertility than the deeper one. Soil with shallow pyritic layer has high acidity, Fe, S, and Al contents, also contain low macro nutrients (N, P, K, and Mg) availability. Furthermore, shallow pyritic depth reduced the oil palm growth, nutrients uptake and oil palm productivity.
Co-Authors Edy Sigit Sutarta Erwin Nyak Akoeb Hartono Hartono Sigit Heru Murti