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All Journal Jurnal Ilmu Pertanian Indonesia MAJALAH ILMIAH GLOBE Soil REns
Muhammad Amir Solihin
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Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Education

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Identifikasi Taksa Tanah di Situs Megalitik Gunung Padang Kabupaten Cianjur Mahfud Arifin; Ridha Hudaya; Apong Sandrawati; Muhammad Amir Solihin; Ganjar Herdiansyah
Soilrens Vol 14, No 2 (2016)
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (471.28 KB) | DOI: 10.24198/soilrens.v14i2.11128

Abstract

Mount Padang was famous megalith sites placed in Cianjur District. Mani discipline of science studied Mount Padang sites in order to find out the truth of histories. Based on geological studies, Mount Padang sites constructed by andesitic rock, this argument need more fact for get the real data. This research aimed to analysis pedological proses in Mount Padang sites. The result of study was soil classification which description by soil profile. Based on result of reseach the soil in Mount Padang formed in Qv rock formation. The result of soil profile analized with 2 meters depth, there was 10 layer formed e.g Ap, AB, Bw1, Bw2, BC1, BC2, CB1, CB2, C1, and C1. The genesis of Mount Padang soil was in viril levels, due to molic epipedon and cambic that found as below horizon diagnostics. Based on soil taxonomy, this pedon were classified as Typic Dystrudepts.Key words: megalith sites, andesitics rock, soil profile, viril, cambic
PENGARUH KONDISI TOPOGRAFI TERHADAP SEBARAN SUHU PERMUKAAN LAHAN: Studi Kasus di Hulu Sub DAS Cikapundung, Jawa Barat Noviani Putri; Muhammad Amir Solihin
Majalah Ilmiah Globe Vol. 25 No. 1 (2023): GLOBE VOL 25 NO 1 TAHUN 2023
Publisher : Badan Informasi Geospasial

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Abstract

ABSTRAK Wilayah hulu daerah aliran sungan (DAS) merupakan area resapan air yang penting dalam siklus hidrologi. Sebaran suhu permukaan lahan (Land Surface Temperature/LST) dapat menjadi prediktor perubahan kondisi hidrologi. Sebaran vegetasi dan kondisi topografi di Hulu Sub-DAS Cikapundung dapat mempengaruhi sebaran LST. Penelitian ini bertujuan mengetahui hubungan LST dengan kondisi topografi berupa elevasi, slope dan aspek melalui data penginderaan jauh. Nilai LST diperoleh dengan metode Mono Window Algorithm menggunakan citra multispektral Landsat 8 OLI, sedangkan sebaran vegetasi menggunakan metode Normalized Difference Vegetation Index (NDVI) dari pengolahan citra Sentinel 2A-MSI. Kondisi topografi dianalisis menggunakan DEMNAS. Analisis statistik korelasi dan regresi dilakukan untuk mengetahui hubungan LST dan kondisi topografi. Hasil penelitian menunjukkan bahwa sebaran LST berkorelasi negatif signifikan dengan NDVI, elevasi dan slope. Namun, LST tidak signifikan berkorelasi dengan aspek. Pengaruh elevasi terhadap LST pada bulan basah dan kering yaitu 41-45%, sedangkan pengaruh slope sebesar 26-31%. Karakteristik tutupan lahan melalui nilai NDVI juga mempengaruhi hubungan antara LST dan kondisi topografi. Elevasi rendah dan slope yang datar memperbesar ruang penerimaan radiasi matahari sehingga LST lebih tinggi. Tutupan lahan tegalan dan permukiman pada wilayah hulu DAS menyebabkan evapotranspirasi dan LST yang tinggi sehingga mengganggu fungsi hidrologi. Oleh karena itu, pemantauan LST dengan mempertimbangkan kondisi topografi sangat penting dilakukan terutama terhadap wilayah yang mengalami perubahan tutupan lahan. Hasil penelitian ini dapat digunakan sebagai basis data pemantauan kondisi hidrologi, perencanaan tata ruang dan antisipasi perubahan iklim di wilayah hulu DAS.
Combination Effect of NK and P Fertilizers on Soil Available-K, K Absorption, and Sweet Corn Productivity in Inceptisols Emma Trinurani Sofyan; Muhammad Amir Solihin; Oviyanti Mulyani; Annisya Salsabilla; Asty Nesya; Irwandhi, Irwandhi
Jurnal Ilmu Pertanian Indonesia Vol. 30 No. 1 (2025): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18343/jipi.30.1.187

Abstract

One factor affecting sweet corn's (Zea mays saccharata Sturt.) productivity refers to soil fertility and proper fertilization. This study aimed to determine the optimal combination of NK and P fertilizer doses to enhance the growth and yield of corn grown on Inceptisols. This research was conducted at the Soil Chemistry and Plant Nutrition Experimental Field, Faculty of Agriculture, Universitas Padjadjaran. The Randomized Block Design consisted of 10 treatments with three replicates each. The treatments included: A, control; B, standard NPK; C, ¼ dose NK + 1 P + ½ N; D, ½ dose NK + 1 P + ½ N; E, ¾ dose NK + 1 P + ½ N; F, 1 dose NK + 1 P + ½ N; G, 1¼ dose NK + 1 P; H, 1 dose NK; I, ½ dose NK + ½ single N,P,K; and J, ¾ dose NK + ¼ single N,P,K. The results showed that the combination of NK and P fertilizers significantly affected the growth and yield of sweet corn. The treatment with ¾ NK + 1 P + ½ N had a notable impact on cob weight (0.33 kg/cob), cob diameter (5.05 cm), and cob length (21.2 cm). This treatment also increased K absorption to 34.49, available soil K to 2.45 cmol kg-1, and the sweetness level of corn to 13.56%. This study provides new recommendations for corn fertilization to improve the growth and yield on Inceptisols. Keywords: optimal fertilizer dosage, corn growth, corn productivity, nutrient uptake
Co-Authors Annisya Salsabilla Apong Sandrawati Asty Nesya Emma Trinurani Sofyan Ganjar Herdiansyah Irwandhi, Irwandhi Mahfud Arifin Noviani Putri Oviyanti Mulyani Ridha Hudaya