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All Journal Journal of the Indonesian Tropical Animal Agriculture Jurnal Agroplasma
D.W. Widjajanto
Faculty of Animal Agriculture, Diponegoro University, Semarang, Central Java
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences

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PHOSPHATE ROCK APPLICATION ON ALFALFA (Medicago sativa L.) PRODUCTION AND MACRONUTRIENTS IN LATOSOL SOIL Liani, Y.; Hong-Qing, Hu; Sumarsono, S.; Widjajanto, D.W.; Guanjie, Jiang
Journal of the Indonesian Tropical Animal Agriculture Vol 36, No 4 (2011): (December)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.36.4.290-296

Abstract

The objective of this study was to evaluate the effectiveness of phosphate rocks (PRs) fertilizercompared to chemical P fertilizer for the best crop production and macronutrients of alfalfa. Acompletely randomized design under 3x3 factorial patterns was used in this research. The first factorwas different sources of P fertilizer: Guizhou Phosphate Rock (GPR), Jingxiang Phosphate Rock (JPR),and Single Super Phosphate (SSP). The second factor was level of P fertilizer: 75, 100, and 125 mgP2O5/kg soil. A control treatment (without addition of P fertilizer, CK) was added as a comparison withthe treatments. The results showed that JPR was the best for alfalfa production, whereas GPR and SSPwere better for nutrient content in the alfalfa tissue than JPR. On the whole, phosphate rocks had similareffect on alfalfa growth compared to SSP at the experimental conditions.
Produksi Tanaman Ubi Jalar Ungu dan Rumput Gajah Odot pada Sistem Tanam Tumpangsari dengan Jarak Tanam Berbeda Asmoro, Zherlin; Widjajanto, D.W.; Sumarsono, Sumarsono
JURNAL AGROPLASMA Vol 9, No 1 (2022): AGROPLASMA VOL 9 NO 1
Publisher : UNIVERSITAS LABUHANBATU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/agroplasma.v9i1.2732

Abstract

The aim of the study was to examine the treatment of purple sweet potato spacing and elephant grass cv. Odot (Pennisetum purpureum cv. Mott) spacing on the production of purple sweet potato and elephant grass cv. Odot. Field experiment was conducted in Kalongan Village, East Ungaran Sub-district, Semarang District (7o08’27”-7o15’72”Sand 110o40’88”-110o.48’14” E). Analysis of soil, fertilizer and dry matter of purple sweet potato and elephant grass cv. Odot were carried out at the Ecology and Plant Production Laboratory, Department of Agriculture, Faculty of Animal and Agricultural Sciences, Diponegoro University, Semarang from March to August 2021. A 2 x 4 factorial experiment based a randomized block design with 3 replications was used throughout the experiment. The first factor was the spacing of purple sweet potatoes consisted of V1: 90 cm x 30 cm, V2: 90 cm x 40 cm, V3: 90 cm x 50 cm and V4: 90 cm x 60 cm. The second factor was the spacing of elephant grass cv. Odot, namely T1: 90 x 60 cm and T2: 90 x 45 cm. The data obtained were statistically analyzed using analysis of variance (ANOVA) and significantly different parameters were tested by Duncan's Multiple Distance Test at 5% level. The results showed that the spacing of purple sweet potato and spacing of elephant grass cv. Odot had no significant effect on the production of purple sweet potato but had a significant effect on the production of elephant grass cv. Odot. Based on the results of the competition index, it was concluded that the purple sweet potato plant was more dominant than the elephant grass cv. Odot. Keywords : dry matter production, intercropping, Pennisetum purpureum cv. Mott, sweet potato
Co-Authors Asmoro, Zherlin Hu Hong-Qing Jiang Guanjie Sumarsono Sumarsono Y. Liani