Spanish Journal of Agricultural Research
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Tunisian consumer preferences for local forest honey attributes: A market segmentation analysis
No full textAim of study: This study focuses on the segmentation of local forest honey market based on consumer preferences for its origin and other sensory attributes.
Area of study: Tunisia
Material and methods: The empirical analysis relies on a face-to-face questionnaire survey of 200 respondents, conducted in 2019 among Tunisian consumers. A cluster analysis was used to identify the market segments and multinomial logit analysis was used to determine segment membership characteristics.
Main results: Three distinct market segments were identified. The first segment of consumers (44% of the sample) prefer eucalyptus and multifloral honey from the Northwest origin; the second segment (39%) is composed of consumers that tend to buy honey mainly produced in the eastern region of the country; in the third (17%), consumers prefer thyme-rosemary' honey.
Research highlights: Consumer preferences for local forest honey mainly depend on its geographical origin, flower type, flavor and color. Findings suggest that gender, income, and grocery shopping task are the main determinants of the importance of these attributes
Assessment of consumer-grade camera-derived vegetation indices for monitoring nitrogen and leaf relative water content of maize
No full textAim of study: To develop non-destructive and rapid monitoring of water and nitrogen status in maize crops.
Area of study: Bu-ali Sina University, Hamedan province, Iran.
Material and methods: We used a low-cost modified consumer-grade camera to extract 40 vegetation indices for monitoring leaf N concentrations, SPAD values and relative water content (RWC). In this regard, 528 images taken by the low-cost camera in two consecutive years (2017 and 2018) from maize plants cultivated in a greenhouse under different irrigation and N treatments were evaluated.
Main results: Results showed that the best performance outcomes regarding the studied vegetation indices were MCARI, CTVI and CR for SPAD values; MCARI, HUE and CTVI for leaf N concentrations; and TRVI, NDVI and DVI for RWC. In order to increase accuracy of estimated measured data, multiple linear regression equations with combinations of the MCARI, TRVI, NDVI and EVI indices were used. As observed, R2 value was 0.91, 0.60 and 0.90 for SPAD, leaf N concentration and RWC estimation, respectively.
Research highlights: The combination of MCARI, TRVI, NDVI and EVI indices provided more accuracy to most of the previous single variable regression models
Pathogenesis of domestic pigs submitted to mycobacterial sensitizations previous to experimental infection with Mycobacterium bovis
No full textAim of study: To demonstrate the virulence of a Mycobacterium bovis local pig isolate in order to contribute to a better understanding of the pathological and immunological consequences of M. bovis infection in previous sensitized animals.
Area of study: Buenos Aires, Argentina
Material and methods: One group of ten pigs received two oral doses of killed M. bovis suspension and a comparative intradermal tuberculin test (CIT) (multiple sensitized) and then was infected with the M. bovis strain. Another group only received the CIT (single sensitized) and the infective dose. Humoral immune response was followed monthly, and gross pathology, histopathological and bacteriological analysis were performed at necropsy 100 days after infection.
Main results: M. bovis oral infection induced lesions and allowed bacterial growth in most of the animals. Previous sensitization with killed M. bovis suspension slightly raised the intensity of the response, as the multiple sensitized group showed higher lesion scores and humoral response.
Research highlights: Although the differences in lesion scores were not statistically significant, oral route infection after sensitization can modify the course of infections towards a fast development of lesions with a higher fibrotic component suggestive of increased resistance to infection in the right conditions
RETRACTED ARTICLE Fuzzy multicriteria analysis of “Better Cotton” farmers’ adoption and experts’ recommendation on cotton pest and disease management practices
No full textRETRACTATION
The SJAR Editorial Board, following the Guide to Good Practices of Editorial CSIC and the international recommendations of editorial ethics, due to a conflict of duplicity, has agreed to formally retract the following article: Fuzzy multicriteria analysis of “Better Cotton” farmers’ adoption and experts’ recommendation on cotton pest and disease management practices (2022), by Absar M. Jiskani, Manzoor A. Abro, M. Ibrahim Khaskheli and Khadim H. Wagan. Spanish Journal of Agricultural Research, Volume 20, Issue 4, e1006. https://doi.org/10.5424/sjar/2022204-18953.
The retractation is based on the following: in addition to authorship and funding disputes that we cannot arbitrate, the article was submitted to two journals at the same time: Spanish Journal of Agricultural Research (SJAR) and Academia Journal of Agricultural Research (AJAR). This evidence came to light once the article was published in SJAR.
The article was also published in AJAR 10(3), 042-053, March 2022: Fuzzy multi-critaria analysis of better Cotton farmers' adoption and experts' recommendation on Cotton pest and disease management practices, by Absar Mithal Jiskani, Noor Nabi Bhutto and Abdul Rehman, https://www.academiapublishing.org/journals/ajar/content/2022/Mar.htm, DOI: 10.15413/ajar.2021.0128. Currently there is neither access to the pdf nor there is any information.
Only the author Absar M. Jiskani is common to both articles.
Both journals indicate in their instructions the same. In the case of AJAR (https://www.academiapublishing.org/journals/ajar/policy.htm), “Authors must not submit the same work, in whole or in part, to two places of publication at the same time, or at any time while the manuscript is under review at ACADEMIA PUBLISHING”. In the case of SJAR (https://revistas.inia.es/index.php/sjar/about/submissions): “Submission of a manuscript implies the work described has not been published previously in any language (except in a book of abstracts, in the proceedings of a scientific meeting or as part of a thesis); the work is not under consideration for publication elsewhere, etc. “.
When comparing the submitted version to SJAR to the article published in AJAR (pdf file supplied by the claimant), both articles present more than 80% similarity, with the abstract, tables and figures being identical. This similarity is unacceptable
Inclusion of olive by-products in growing diets causes minor effects on meat quality of Iberian pigs fattened in a traditional system
No full textAim of study: To evaluate two experimental diets based on olive cake supplied during the growth period as an alternative to the restricted feeding applied in the production of Iberian pigs fattened with acorn (Montanera system).
Area of study: Southwest of Badajoz, Spain
Material and methods: 44 Iberian pigs were divided in three diet groups: 1) control (C) group (n=15), 2) dry olive pulp (DOP) group, fed a compound feed elaborated with olive pulp (n=14), and 3) wet crude olive cake (WCOC) group, fed a compound feed and olive cake silage supplied ad libitum (n=15). Subcutaneous fat biopsies were taken and backfat thickness and longissimus thoracis et lumborum (LTL) area were measured. In addition, quality traits (intramuscular fat percentage, color, pigment content, water holding capacity and shear force) were measured in LTL. Backfat fatty acid profile and intramuscular fat were also analysed.
Main results: Significant differences were observed between groups for most of the fatty acids in backfat at 95 kg but differences were of lower magnitude at 160 kg and affected only to C16:1, C18:0, C18:1, C20:0, C20:1 and ΣSFA. Otherwise, lower values for red color and myoglobin content and higher for thawing water losses were observed for DOP pigs. The WCOC did not affect the analysed quality traits.
Research highlights: Experimental diets did not have an important impact on growth, carcass composition or meat quality. Therefore, WCOC dietary treatment could be an interesting alternative that could reduce the undesirable effects of feed restriction
Determinants of organic wine production: An application in the DOC Rioja wine industry
No full textAim of study: To analyse the role that valuable resources and agglomeration would play in the decision to produce organic wines.
Area of study: The Controlled Designation of Origin (DOC) Rioja wine industry in Spain, the leading qualified denomination of origin of Spain.
Material and methods: Taking into account the nature of the dependent variable, a binomial logit model was used.
Main results: This paper confirms the significance of valuable resources such as financial resources and human resources, but also of knowledge-based spillovers from proximate organic wineries in improving the probability of producing organic wines. Contrary to expectations, technological resources and experience in the wine industry have no significant effect.
Research highlights: The resource based-view and the cluster approach are complementary to improving the predictive elements of producing organic wine in the DOC Rioja wine industry. The authors were unable to pre-register the analysis involving primary data collection before the data collection exercise starts. This requirement is from January 2022 and the survey period of this paper was on 2017. According to the editorial policy of the journal this analysis should be considered exploratory
English
No full textCorn is the most cultivated and consumed cereal in the world. The overall objective of this review was to study the methodologies to measure and evaluate the in-row seed spacing for precision planting as well as to determine the technological alternatives that would allow obtaining information about seed mapping for corn crop planting in precision agriculture applications. As a conceptual synthesis about the electronic measurement system, there are two strategies for determining in-row seed spacing in the precision planting. Indirect methods correspond to the measurement before the seeds reach the furrow, while direct methods correspond to the measurement with the seeds placed in the furrow. The indirect measurement strategy is the most widely used in research publications and commercial planter monitors. Within this method, the seed spacing measurement systems use optical or radio wave type seed sensors. Corn seed counting accuracy through electronic measurement systems with optical-type seed sensor is at least 96%. The microwave seed sensor is used commercially by a few companies whose technologies are patented. The direct measurement strategy is under development and requires further research. The main limitation of these technologies is the seed detection in the furrow, which limits the planter travel speed and the equipment cost. The conceptual proposal for the term ‘seed mapping’ is to provide integrated and geo-referenced information on in-row seed spacing and depth for precision planting
Total phenolics, quercetin glycosides and antioxidant activity in organic and conventional orchards in three apple cultivars during fruit growth
No full textAim of study: To evaluate whether organic and conventional management practices, cultivar and fruit growth stage affect total phenolic content, antioxidant activity and quercetin glycosides in apples of three cultivars.
Area of study: The trials were conducted in commercial orchards located in Chimbarongo, O’Higgins Region, Chile.
Material and methods: Two types of orchard management (organic and conventional) were studied in three apple cultivars: Gala 'Brookfield', Granny Smith and Fuji 'Raku Raku'. Total phenolic content, antioxidant activity and quercetin glycosides were evaluated according to management practices, fruit growth stage, cultivar, fruit weight and skin surface. Data were analyzed statistically using a truncated multiple regression model.
Main results: No differences were found between organic and conventional management regarding polyphenol concentration and antioxidant activity, except for specific quercetin glycosides. However, significant differences were observed between cultivars in both variables, as well as in fruit development throughout the season, which showed a significant dilution of polyphenols and antioxidant activity as the fruit grew.
Research highlights: Cultivar and fruit growth stage were decisive in total phenolic content, glycosidic quercetins and apples antioxidant activity. Conventional and organic management practices were significant for quercetin glycoside concentration, which is the main polyphenol in apples
Replacement of inorganic trace minerals by chelated minerals in pullet diets (12 to 20 weeks of age)
No full textAim of study: An experiment was carried out aimed to evaluate the effects of different levels and sources of trace mineral to laying pullets with two initial body weights (BWs).
Area of study: The experiment was carried out in Federal University of Goiás, Goiânia, Goiás, Brazil
Material and methods: Two hundred and eighty eight Bovans White pullets aged 12 weeks old were allotted in a completely randomized design and a 2×3 factorial arrangement, wherein the main effects included initial BW (light-weight and heavy-weight) and three dietary trace mineral sources and levels (100% inorganic, 100% chelated and low-dose corresponding to 50% chelated), totalizing six treatments with eight replicates of six birds. The performance, the metabolizability coefficient of nutrients, and the onset of lay were evaluated at rearing phase (12 to 20 weeks). At 17th and 20th weeks of age, the relative weight of reproductive and digestive organs, abdominal fat, and tibia quality were assessed. A residual effect was evaluated at production phase on productive performance and egg quality.
Main results: The mineral source did not affect the performance of pullets. Birds fed 50% chelated mineral produced the lowest eggshell. The heavy-weight birds showed higher egg weight and eggshell quality. The lighter birds showed lower abdominal fat weight and lower tibia robustness index.
Research highlights: The replacement of 100% of inorganic mineral for chelated mineral do not result in decrease of bird performance at rearing and at production phase, but a minimum amount should be provided to ensure growth and nutrient metabolizability
The effect of dietary energy levels on the sexual puberty of ram lambs
No full textAim of study: To evaluate the effect of different feeding levels on body weight changes, sexual behavior activities, and spermatogenesis characteristics of testis tissue in immature Iranian breed lambs.
Area of study: University of Tabriz, Iran.
Material and methods: A total of 40 (start of experiment, 4; after 6 months, 12; 9 months, 12; sexual behavior, 12) two-month-old immature ram lambs were divided into three equal groups and were fed for eight months with three different concentrate mixtures formulated using conventional ingredients based on barley grain. Lambs received the same amount of crude protein with three levels of energy. The diet of the low-energy (LE) group had an energy of 10% lower than the control group, which received a diet with optimum energy of 100% according to the NRC. Lambs in the high-energy (HE) group were fed diets with an energy of 10% higher than the optimum energy group. In each group, four lambs were castrated in three steps, including the ages of 2 (start of treatment), 6, and 9 months. Body weight and scrotal circumference were recorded monthly. Sexual behaviors toward estrus ewes were evaluated for 30 min, and the testes were analyzed histologically.
Main results: The lambs in the LE group had lower body weight and smaller scrotal circumference than HE group (p<0.05). Sexual behaviors in the HE group occurred at an earlier age, such as mount and mounts with ejaculation, as the external presentations of puberty (p<0.05).
Research highlights: Underfeeding of pre-pubertal animals delayed puberty, while high-plane feeding advanced puberty