Yudhi Ahmad Nazari
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Pengaruh Pemberian Bahan Organik Pada Lubang Resapan Biopori Modifikasi Terhadap Kontribusi Ketersediaan Unsur Hara Bagi Tanaman Kelapa Sawit

ZIRAA'AH MAJALAH ILMIAH PERTANIAN Vol 40, No 3 (2015): Ziraa'ah Vol 40 No. 3 Oktober 2015
Publisher : Pusat Penerbitan Ilmiah Universitas Islam Kalimantan

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Abstract

          The productivity of palm oil plantations are generally still low compared to the potential productivity of the land. Fertilization is an important factor in acheving high productivity, mainly to meet the requirement of nutrient avaibility. The research objective was to determine the avaibility of nutrient in oil palm leaves from the application of organic matter in modified biopore infiltration pit. This research was conducted in palm oil plantation PTPN 13 Pelaihari Tanah Laut,in 2013 and 2014. Sample collection were done by taking a leaf on the 17th oil palm midrib, which was taken using a purposively sampling spread system. The results showed a low level of nutrient content of nitrogen, potassium, and magnisium in plant leaf tissue in the palm oil plantation. Content of Phosfat in optimum level, and Calcium elements found  in a state of excess.

Deteksi Perakaran Kelapa Sawit Pada Lubang Biopori Modifikasi Dengan Metode Geolistrik Resistivitas

ZIRAA'AH MAJALAH ILMIAH PERTANIAN Vol 40, No 1 (2015)
Publisher : Pusat Penerbitan Ilmiah Universitas Islam Kalimantan

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Abstract

Palm has a fibrous root system, consisting of a primary root, secondary, tertiary and quaternary. In general, palm root system is closer to ground level, however, in certain cases it may penetrate deeper. One of the root functions is to absorb water and nutrients from the soil. Palm roots dispersion can be determined by using the geoeletric resistivity method. Geoelectric resistivity data using Wenner configuration method is measured in three trajectory forming an equilateral triangle on palm plant row with a variation of 9 m (AB / 2) in accordance with palm plant spacing, with potential electrode spacing of 30 cm (MN / 2). Collection of geoelectric resistivity data is done by injecting electric current into the earth through two electrodes, the potential difference is then measured through two potential electrodes. Measurements were performed by varying the distance of the electrodes and potentials, gradually from the smallest distance to the largest. Measurement of palm root dispersion detection consists of 3 tracks (L1, L2, and L3). Measurements on June 24, 2014 carried out on track 1 (L1) between rows of palm plants, track 2 (L2) between the palm plant within the same row, and track 3 (L3) diagonally between the rows of plants (Figure 1). Measurement on July 8, 2014 were on track 1 (L1) is between rows of palm plants, track 2 (L2) and track 3 (L3) diagonally between the rows of plants.Geoelectric on diagonal trajectory where modified biopore infiltration pit is in place resulted in low resistivity values. This is related to soil water availability, where it affects the development of the root towards the biopore pits.