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Eva Sartini Bayu

Unknown Affiliation

Author-ID : 2947184

Agriculture, Biological Sciences & Forestry Humanities Earth & Planetary Sciences Energy Environmental Science

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Articles

PENDUGAAN CADANGAN BIOMASSA DI ATAS PERMUKAAN TANAH PERKEBUNAN KELAPA SAWIT DI SUMATERA UTARA Muhdi Muhdi; Iwan Risnasari; Eva Sartini Bayu
Bumi Lestari Journal of Environment Vol 15 No 1 (2015)
Publisher : Environmental Research Center (PPLH) of Udayana University

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The objective of the research was to find the model of above ground biomass in the oil palmplantation, North Sumatera. The research was done at the oil palm plantation, North Sumatera. Theeffect of oil palm plantation to biomass stock in the plots were studied by using the data ofthree plots with each size 100 m x 100 m. The plots are placed based on purposive sampling.Above ground biomass stocks are counted by allometric equation. The results of the researchshowed that allometric equation of oil palm trees was W = 0,003 D. The result showed thatabove ground biomass of oil palm plantation in the North Sumatera were 64.20 Mg ha

Application of Empty Fruit Bunches of Oil Palm Compost and Phosphate Fertilizers in Sorghum Planting (Sorghum bicolor (L.) Moench) at Rubber Planting Strip Oktri Fadhilah Nasution; T Irmansyah; Eva Sartini Bayu
Jurnal Agroekoteknologi Vol 5, No 1 (2017)
Publisher : Universitas Sumatera Utara

The aim of the research was to know the effect of empty fruit bunches of oil palm (EFBOP) compost and phosphate fertilizers in sorghum planting (Sorghum bicolor (L.) Moench) at rubber planting strip. Research was conducted at Sei Putih Research Institute, Galang, Medan with altitude ± 80 meters above sea level from April until August 2015, using randomized block design with two factors : EFBOP compost (without EFBOP, 7.5kg/plot and 15 kg/plot) and phosphate fertilizers (without fertilizer, 37.5 g/plot, 75 g/plot and 112.5 g/plot).Observed paramaters were plant height, number of leaves, diameter of stem, days of flowering, panicle number per sample, panicle number per plot and weight of 1000 seeds. The results showed the treatment of EFBOP compost had a significant effect to the plant height at 6,7,8,9, and 10 weeks after planting and number of leaves at 5,6,7, and 8 weeks after planting, best result at application of EFBOP compost range between T1 - T2 (7.5 kg/plot – 15 kg/plot). Phosphate fertilizers had a significant effect to the weight of 1000 seeds ,the number of panicle per sample, number of panicle per plot , phosphate fertilizer having optimum point at 60.93 g/plot – 62 g/plot.

Critical periode of weed control in Zea mays L. wilter januardi padang; Edison Purba; Eva Sartini Bayu
Jurnal Agroekoteknologi Vol 5, No 2 (2017)
Publisher : Universitas Sumatera Utara

Weeds are really making disadvantages on corn (Zea mays L.). Since they compete to obtain light, water and nutrient. The competition may occur in the beginning until the harvesting time. The aims of this research is to determinate the critical periode of weed control on corn (Zea mays L.). The present study was conducted at exfarming field of corn, Tanjung Sari, Medan selayang. Variable factor being observed were plant height, initiation time of flower, dry weight of grain per sample, dry weight of grains per plot, weight of 100 corn grains, value harvesting indeks, height of weeds, dry weight of weeds and density of weeds. There were 12 treatments conducted, no weeds 2 week after planting : P1, no weeds 4 week after planting : P2, no weeds 6 week after planting : P3, no weeds 8 week after planting : P4, no weeds 10 week after planting : P5, no weeds are found till the harvesting time : P6, weedy until 2 week after planting : P7, weedy until 4 week after planting : P8, weedy until 6 week after planting : P9, weedy until 8 week after planting : P10, weedy until 10 week after planting : P11, weedy until the harvesting time : P12. The treatment were arranged in a randomized block design with three replication. The result showed that the weeding time for corn has non significantly affected to the plant height, dry weight of grains per sample, value harvesting indeks and dry weight of grains per plot, but significantly affected to the weight of 100 grain of corn.The filed of research was dominated by Eleusine indica. The critical periode of corn was happened of 21 day after planting up to 28 days after planting. Key words: corn, critical periode, weed, weeding periode

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