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Ida Bagus Putu Bhayunagiri
Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana, Jln. PB. Sudirman Denpasar, Bali 80232, Indonesia
Agriculture, Biological Sciences & Forestry

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Aplikasi Sistem Informasi Geografis untuk Pemetaan Kerapatan Vegetasi dan Penutup Lahan Hubungannya dengan Daerah Resapan Air di Kawasan Pariwisata Ubud, Gianyar, Bali Isabella Tiurmauli; Ni Made Trigunasih; Ida Bagus Putu Bhayunagiri
Nandur Vol 3 No 3 (2023)
Publisher : Fakultas Pertanian, Universitas Udayana

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In urban environments, the land cover composition plays a crucial role in determining the hydrological processes, particularly the infiltration rate. The Normalized Difference Vegetation Index (NDVI) is widely used to assess vegetation abundance and health. This discussion paper aims to investigate the relationship between land cover types and NDVI values in the context of infiltration in urban areas. Ubud District is one of the urban and tourism areas with a population and tourism that continues to increase resulting in the conversion of land functions into residential areas, highways, and industrial development. This research employed a descriptive qualitative method, with data analysis techniques utilizing digital classification and spectral index transformation on Sentinel 2A remote sensing data from the year 2022. The results of the study revealed that areas with forest and vegetation cover, characterized by high vegetation density (values ranging from 0.59 to 0.95), contribute to favorable infiltration conditions in urban and tourism areas.Vegetation cover, as indicated by higher NDVI values, positively influences infiltration rates by improving soil structure and water absorption. Incorporating green spaces and vegetation into urban planning strategies can help mitigate stormwater runoff issues and promote sustainable stormwater management practices. However, further research is needed to comprehensively understand the complexities associated with the relationship between land cover, NDVI, and infiltration under various urban contexts.
Evaluasi Kesuburan Tanah pada Lahan Sawah Berbasis Sistem Informasi Geografis di Kecamatan Rendang Dwiki Sinatrya Putra; Ida Bagus Putu Bhayunagiri; Ni Made Trigunasih
Nandur Vol 4 No 1 (2024)
Publisher : Fakultas Pertanian, Universitas Udayana

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Indonesia is an agricultural country which rice is the main food source The productivity of rice plants in Rendang District continues to decline. Rice productivity from 2011 to 2014 decreased from 6.51 tons/ha down to 5.28 tons/ha according to BPS data for Rendang District in 2021. This study aims to determine soil fertility status, limiting factors, and soil management efforts to improve soil fertility. This research was carried out in Rendang District from July to September 2023. The methods used include survey methods and soil tests in the laboratory. The chemical properties of the soil tested include CEC, base saturation, P-total, K-total, C-organic. Assessment of soil fertility status based on the results of soil chemical properties analysis is matched with Soil Fertility Status Assessment Criteria according to PPT in 1995. The results showed that there were two classes of soil fertility status, namely low and medium. Low fertility status is found in homogeneous land units I (Rendang, Nongan, and Pesaban Villages) and homogeneous land units III (Menanga Village). Low fertility status is being found in homogeneous land units II (Menanga, Rendang, Nongan, Pesaban Villages). The parameters that become limiting factors are P-total and K-total. Based on the results of the study, it is recommended to fertilize SP-36, KCl, and the addition of organic fertilizers according to the constraints of soil fertility parameters and an analysis of the fertilizer needs should be carried out to determine the right dose according to the cultivated plants.
Co-Authors Dwiki Sinatrya Putra Isabella Tiurmauli NI MADE TRIGUNASIH