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AGRIVITA, Journal of Agricultural Science
Published by Universitas Brawijaya
ISSN : 01260537     EISSN : 24778516     DOI : https://doi.org/10.17503
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
AGRIVITA Journal of Agricultural Science is a peer-reviewed, scientific journal published by Faculty of Agriculture Universitas Brawijaya Indonesia in collaboration with Indonesian Agronomy Association (PERAGI). The aims of the journal are to publish and disseminate high quality, original research papers and article review in plant science i.e. agronomy, horticulture, plant breeding, soil sciences, plant protection and other pertinent field related to plant production. AGRIVITA is published three times per year. The Journal has been indexed in SCOPUS, Scimago Journal Ranks (SJR), Emerging Source Citation Index ( ESCI-Web of Science), EBSCO, ProQuest, Google Scholar and others international indexing. AGRIVITA is accredited first grade (Sinta 1/S1) for five years (2018-2023) based on Decree No: 30/E/KPT/2018 by Ministry of Research, Technology and Higher Education (Ristek Dikti), The Republic of Indonesia. We accept submission from all over the world. All submitted articles shall never been published elsewhere, original and not under consideration for other publication.
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Articles 13 Documents
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Search results for , issue " Vol 33, No 3 (2011)" : 13 Documents clear
A Study of Using QUEFTS Model for Establishing Site Specific Fertilizer Recommendation in Maize on The Basis of Farmer Fields Wijayanto, Yagus; Prastyanto, Edy
AGRIVITA, Journal of Agricultural Science Vol 33, No 3 (2011)
Publisher : Faculty of Agriculture University of Brawijaya and Indonesian Agronomic Assossiation

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Abstract

Nutrient Use Efficiency (NUE) of Maize is considered low. There are two important factors  responsible for this condition: (a) uniform fertilizer recommendation, (b) lack of consideration on soil variability, Indigenous Nutrient Supply and plant nutrient needs.  A method for studying low NUE and the capability of studying these two factors are urgently required. This study used Quantitative Evaluation of Fertility on Tropical Soils (QUEFTS) model. The main aim of this study was to employ and evaluate QUEFTS model for establishing site specific fertilizer recommendation in maize on the basis of farmer fields. Due to a unique characteristic of farmer field, it may be interesting to observe the pattern of soil fertility in relation to yields.  Six farmers fields and thirty soil samples were taken and analysed in the laboratory. The results showed that QUEFTS model was a valuable tool to make fertilizer recommendation by using yields as an integrated indicator. The results also showed that QUEFTS model was a promising method for establishing fertilizer recommendation for maize. The merits of model for determining Indigenous Nutrient Supply, nutrient yield limiting factors, balanced fertilizer recommendation show that QUEFTS model is a valuable tool for site specific fertilizer recommendation.   Keywords: QUEFTS, recommendation, site specific, yield
Pathogenicity, Development and Reproduction of The Entomopathogenic Nematode Steinernema sp., in Mealworm Tenebrio molitor Baliadi, Yuliantoro; Sastrahidayat, Ika Rochdjatun; Djauhari, Syamsuddin; Rahardjo, Bambang Tri
AGRIVITA, Journal of Agricultural Science Vol 33, No 3 (2011)
Publisher : Faculty of Agriculture University of Brawijaya and Indonesian Agronomic Assossiation

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Abstract

The pathogenicity, development and reproduction of Steinernema sp., isolate Skpr-20/Str, were studied using Tenebrio molitor. Results revealed that pathogenicity, development and reproduction were significantly influenced by nematode doses. Although the number of invading IJs increased with increasing dose, percentage penetration declined. The IJs reached adulthood within 3 days. Females laid eggs from day 4-7. All eggs remaining inside uterus develop inside the maternal body. The first female bearing endotokia matricida was observed on day 5. In a sand-based assay, nematode was more pathogenic at lower dose instead of higher ones, where optimum dose was 80 nematodes per larva and average number of progeny per female was 5438. Under crowded conditions, development proceeds to IJ stage instead of the J3. The average length and width decreased with increasing of nematode doses. The IJ produced in cadavers infested with 640 nematodes per larva was significantly smaller (492 ± 6.4 µm) than offspring from other doses. The number of days which nematodes first emerged from the cadavers decreased with increasing dose. IJ first emerged at the average of 10-13 days at high IJ densities. It is concluded that the wide experimental characteristic of EPNs is also true for Steinernema sp., isolate Skpr-20/Str.Keywords: development, emergence period, endotokia matricida, entomopathogenic nematode, isolation, pathogennicity, Steinernema sp., isolate Skpr- 20/Str
Biosulfo Fertilizer Development for Horticulture Crops II. The Effect of Phosphate Rock Content and Inoculum Ratio of Biosulfo on P and S Uptake and Yield of Red Onion in Acid and Alkaline Soils Sudadi, Sudadi; Sumarno, Sumarno; Widada, Jaka
AGRIVITA, Journal of Agricultural Science Vol 33, No 3 (2011)
Publisher : Faculty of Agriculture University of Brawijaya and Indonesian Agronomic Assossiation

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Abstract

Research aimed to study the influence of phosphate rock-sulfur (PRS) content and inoculum ratios of biosulfo on P and S uptake and red onion yield on acid (Alfisol) and alkaline (Vertisol) soils.  Two factors evaluated were PRS content (0%, 60%, 80%) and inoculums of A.niger/P.nalgiovensis ratio of biosulfo (0:0, 1:1 and 3:1). As much of 12 kg of soil (Ø 2 mm) mixed thoroughly with biosulfo, basic fertilizer and manure, put into polybag then watering at field capacity moisture content. One bulb of red onion was planted to each polybag and incubated in the green house. The experiments arranged in completely randomized design with three replications. Variables observed included P and S uptake, and onion yield. Data analyzed with F test at 5% level of significant followed with DMRT if any significant influences. The result shows that the increases of PRS content as well as A. niger ratio of biosulfo tend to increase P and S uptake, especially on acid Alfisol.   Highest P and S uptake and onion yield were achieved with treatment combinations of P80I11, P80I31, and P60 I11 for Alfisol,   and  P80 I11,  P60 I11 and P60 I11  for Vertisol respectively.   Keywords:  phosphate, rock content, inoculums ratio,P and S uptake, onion yield

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