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hardy guchi
university of sumatera utara
Agriculture, Biological Sciences & Forestry

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Response on Growth of Oil Palm Seedling (Elaeis guineensis Jacq.) by Adding Dolomite, Fertilizer and Sulphate Reduction Bacteria on Acid Sulphate Soils in Green House Muhammad Ramadhan; Asmarlaili Sahar Hanafiah; Hardy Guchi
Jurnal Agroekoteknologi Vol 6, No 3, Juli (2018)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (314.889 KB) | DOI: 10.32734/jaet.v6i3, Juli.18085

Abstract

Soil fertility is an important aspect of increasing the growth of oil palm seedling. This research aimed to determine the effect of dolomite, fertilizer and sulphate reduction bacteria (SRB) on the growth of oil palm seedlings. This research was conducted at green house used acid sulphate soils. The research used Randomized Block Design with 3 treatments : Dolomite (without dolomite, dolomite 15,80 tonnes/ha, dolomite 31,60 tonnes/ha), fertilizers (without fertilizer, fertilizer 2,5 grams/seedling, fertilizer 5 grams/seedling) and sulphate reduction bacteria (without SRB and given SRB) with 3 replications. The results showed that the application of dolomite (15,8 and 31,6 tonnes/ha) increased soil pH (4.90 and 4.78) statistically significant. Application of sulphate reduction bacteria increased soil pH (4,59) statistically significant. Application of fertilizers (2,5 and 5 grams/seedling) increased the plant height (40,19 and 44,59 cm) and stem diameter (25,33 and 26,90 mm) statistically significant. Application of dolomite and sulphate reduction bacteria inoculum could increase the plant height and stem diameter of oil palm seedlings more than control. The application of dolomite, fertilizers and also sulphate reduction bacteria inoculum could increase the plant height and stem diameter of oil palm seedlings more than control. The best treatment was dolomite 31,60 tonnes/ha, fertilizer 5 grams/seedling and sulphate reduction bacteria inoculum. Application of dolomite could be replaced with sulphate reduction bacteria inoculum. Keywords :   Acid Sulphate Soil, Dolomite, Fertilizer, Soil Fertility, Sulphate Reduction Bacteria
Mapping Of Soil Infiltration In Publik Green Open Space In Medan City Muhammad Arief Siddiq; Hardy Guchi; Sarifuddin Sarifuddin
Jurnal Agroekoteknologi Vol 6, No 3, Juli (2018)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (943.478 KB) | DOI: 10.32734/jaet.v6i3, Juli.18095

Abstract

This study aims to identify and map soil infiltration in public green open space in Medan city.The research was conducted in Public Open Space of Medan City. Soil sampling and measurement of innfiltration was done by using purposive sampling method based on overlapping map of green open space type and soil type map, and got 22 sample points for analysis.The result shows that the ability of soil infiltration in public Open Space in Medan City is classified as slow, slow and moderate criterion. The highest soil infiltration is found at Al Abraar Mosque grave (SPL 20) with infiltration value 30.122 mm / h in medium criteria. The lowest soil infiltration is found in Forest of Taman Beringin City (SPL 10) with infiltration value 1,111 mm / h in medium criterion. Infiltration in the city's open public green space, influenced by the type of soil and vegetation above it.   Keywords: green open space, infiltration, mapping
The Influence of Applying Fertilizer Dose Complete N, P, K, and Mg and Soil Nutrient Indexes Against the Growth of Vegetative Rice Plant (Oryza Sativa L.) Eliasyb Parhorasan Sitanggang; Erwin Masrul Harahap; Hardy Guchi
Jurnal Agroekoteknologi Vol 6, No 3, Juli (2018)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (410.347 KB) | DOI: 10.32734/jaet.v6i3, Juli.18097

Abstract

Rice is the main food needs for the community in Indonesian. Fertilization is one of the activities is very important in increasing the production of rice plant. This research aims to study the influence of granting demand fertilizer plant and soil nutrient indexes against the growth of vegetative rice plant. This research was carried out in lawland district Medan Baru at the points of coordinates 3.331810 LU and 98.385300 BT from August until December 2016. The experimental design used completely randomized design with two factor. The first factor was the provision of Urea, SP36, KCL, and Dolomit. P1= 121,36 gram/plot, P2= 161,82 gram/plot, P3=202,27 gram/plot, P4= 242,73 gram/plot and the second factor was based on soil nutrient index B1= 0,8 (dose less 20), B2= 0,9 (dose less 10%) B3= 1 (100% standart nutrient index), B4= 1,1 (dose plus 10%), B5= 1,2  (dose plus 20) were repeat twice.The result of experiment showed that P2B1 =129,45 gram/plot  the best combination of the application of fertilizers and soil nutrient index P4= 242, 72 gram/plot was the best fertilizer dose treatment B2=0,9 (dose less 10%) was treatment of soil nutrient index.   Keywords : fertilizers, nutrient indexes, paddy
Co-Authors alfikri, m reza asmarlaili sahar asmarlaili sahar hanafiah Eliasyb Parhorasan Sitanggang Erwin Masrul Harahap Muhammad Arief Siddiq Muhammad Ramadhan Mutia Lisdiyanti Sarifuddin Sarifuddin