Spanish Journal of Agricultural Research最新文献_第2页

Effect of environmental conditions and feed forms on the performance and feeding behavior of group-housed growing-finishing pigs 环境条件和饲料形式对群养生长育肥猪的生产性能和采食行为的影响

IF 0.9 4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2024-02-21 DOI: 10.5424/sjar/2024222-19584

M. Fornós, S. López-Vergé, Encarnación Jiménez-Moreno, V. Rodríguez-Estévez, Domingo Carrión, Josep Gasa

{"title":"Effect of environmental conditions and feed forms on the performance and feeding behavior of group-housed growing-finishing pigs","authors":"M. Fornós, S. López-Vergé, Encarnación Jiménez-Moreno, V. Rodríguez-Estévez, Domingo Carrión, Josep Gasa","doi":"10.5424/sjar/2024222-19584","DOIUrl":"https://doi.org/10.5424/sjar/2024222-19584","url":null,"abstract":"Aim of study: To investigate the influence of environmental conditions and feed forms on productivity and feeding behavior of growing-finishing pigs. \u0000Area of study: Farm located in the North-East of Spain (42°03'11.0\"N 2°06'59.5\"E). \u0000Material and methods: Two trials were conducted (n = 72 pigs each). In the Hot-Temperate/Pelleted trial (HT-P), pigs were half the time under hot conditions (average temperature Ta=28.1℃) and half the time under thermoneutral conditions (Ta=25.5℃) and were fed in pellet. In the Temperate-Hot/Mash trial (TH-M), pigs were half the time under thermoneutral conditions (Ta=23.5℃) and half the time under hot conditions (Ta=27.3℃) and were fed in mash. Productivity and feeding behavior were registered. \u0000Main results: Hot conditions during the finishing period in TH-M trial reduced by 118 g/d growth rate and increased feed conversion ratio (2.28 vs. 2.07 kg/kg) compared to HT-P trial (p < 0.001) due to feed intake reduction. Growing pigs under hot conditions and fed in pellet increased total feeder visits (12.8 vs. 7.9 visits/d) and reduced visit size (147 vs. 230 g/visit, p < 0.001); whereas finishing pigs under hot conditions and fed in mash only tended to reduce visit size (308 vs. 332 g/visit, p = 0.08). Pigs fed with mash ate slower (22.8 vs. 34.8 g/min) than pelleted-fed pigs (p < 0.001), independently of environmental conditions. \u0000Research highlights: Feed form and environmental conditions affect both feeding behavior and performance of growing-finishing pigs. Unfortunately, due to a design weakness, it was not possible to obtain the sharp effect of both factors.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140443445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Is social sustainability relevant for food consumers? Evidence from Chile 社会可持续性与食品消费者相关吗？智利的证据

IF 0.9 4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2024-02-21 DOI: 10.5424/sjar/2024222-20600

Andrea Báez-Montenegro, Eugenia Sepúlveda, Rodrigo Echeverría

{"title":"Is social sustainability relevant for food consumers? Evidence from Chile","authors":"Andrea Báez-Montenegro, Eugenia Sepúlveda, Rodrigo Echeverría","doi":"10.5424/sjar/2024222-20600","DOIUrl":"https://doi.org/10.5424/sjar/2024222-20600","url":null,"abstract":"Aim of study: To examine consumer preferences in Chile, an emerging market, for cheese that emphasizes social sustainability features. \u0000Area of study: Chilean consumers. \u0000Material and methods: Three characteristics were included in the choice experiment: price, social sustainability (adherence to labor laws), and cheese type (Gouda, Chanco, and Artisanal cheese), each with three levels. A face-to-face questionnaire was administered to a representative sample of Chilean customers in order to collect data. To evaluate the effect, relevance, and main determinants of choice, a conditional logit model was employed. \u0000Main results: The more attributes are at their most desirable levels, the more likely the cheese will be chosen. Therefore, the most sought-after cheese is that which is inexpensive, conforms to all labor laws, and is of the Chanco variety. When one or more of these three attributes are not at their most desirable level, then price (the lowest) is the attribute that governs the choice, followed by the social sustainability attribute (higher levels of compliance with labor legislation) and, finally, the type of cheese. In terms of socioeconomic variables, older consumers and those with higher education explain a greater preference for the social sustainability attribute over the type of cheese. \u0000Research highlights: These results highlight the importance that social sustainability can have on companies to make their products preferred by consumers. This is the first study to examine the Chilean food industry's social sustainability attribute.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140445163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Land leveling and cover cropping impacts on chemical and biological properties of paddy soil 土地平整和覆盖种植对稻田土壤化学和生物特性的影响

IF 0.9 4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2024-02-06 DOI: 10.5424/sjar/2024221-19824

Masoumeh Izadpanah, M. Shabanpour, Sepideh Abrishamkesh, Iraj Bagheri

{"title":"Land leveling and cover cropping impacts on chemical and biological properties of paddy soil","authors":"Masoumeh Izadpanah, M. Shabanpour, Sepideh Abrishamkesh, Iraj Bagheri","doi":"10.5424/sjar/2024221-19824","DOIUrl":"https://doi.org/10.5424/sjar/2024221-19824","url":null,"abstract":"Aim of study: To examine the impact of solitary land leveling and its combination with cover cropping on the chemical and biological characteristics of paddy soil. \u0000Area of study: This research focused on paddy fields located in Guilan Province, situated in northern Iran. Specifically, two sites were chosen for investigation, where land leveling had been conducted 5 years and 2 years prior to this study, respectively. Furthermore, cover cropping was implemented during the second year after the latter area's land leveling. \u0000Material and methods: A total of 80 composite soil samples were collected, with 20 samples gathered from both leveled and unleveled plots at the designated study sites. Various soil chemical and biological properties such as organic carbon, total nitrogen, available phosphorus, exchangeable potassium, microbial respiration, and biomass carbon were quantified. Subsequently, a paired t-test was employed to analyze the impact of land leveling and the combined effects of land leveling with cover cropping on soil attributes. \u0000Main results: The study revealed that five years after land leveling, there was a significant decrease in organic carbon, total nitrogen, microbial respiration, and biomass carbon. In contrast, the area leveled and cover cropped for two years exhibited higher levels of these attributes compared to adjacent unleveled parcels. \u0000Research highlights: This study highlights the distinct effects that solitary land leveling and land leveling combined with sustainable practices like cover cropping have on soil attributes.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139860717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Land leveling and cover cropping impacts on chemical and biological properties of paddy soil 土地平整和覆盖种植对稻田土壤化学和生物特性的影响

IF 0.9 4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2024-02-06 DOI: 10.5424/sjar/2024221-19824

Masoumeh Izadpanah, M. Shabanpour, Sepideh Abrishamkesh, Iraj Bagheri

{"title":"Land leveling and cover cropping impacts on chemical and biological properties of paddy soil","authors":"Masoumeh Izadpanah, M. Shabanpour, Sepideh Abrishamkesh, Iraj Bagheri","doi":"10.5424/sjar/2024221-19824","DOIUrl":"https://doi.org/10.5424/sjar/2024221-19824","url":null,"abstract":"Aim of study: To examine the impact of solitary land leveling and its combination with cover cropping on the chemical and biological characteristics of paddy soil. \u0000Area of study: This research focused on paddy fields located in Guilan Province, situated in northern Iran. Specifically, two sites were chosen for investigation, where land leveling had been conducted 5 years and 2 years prior to this study, respectively. Furthermore, cover cropping was implemented during the second year after the latter area's land leveling. \u0000Material and methods: A total of 80 composite soil samples were collected, with 20 samples gathered from both leveled and unleveled plots at the designated study sites. Various soil chemical and biological properties such as organic carbon, total nitrogen, available phosphorus, exchangeable potassium, microbial respiration, and biomass carbon were quantified. Subsequently, a paired t-test was employed to analyze the impact of land leveling and the combined effects of land leveling with cover cropping on soil attributes. \u0000Main results: The study revealed that five years after land leveling, there was a significant decrease in organic carbon, total nitrogen, microbial respiration, and biomass carbon. In contrast, the area leveled and cover cropped for two years exhibited higher levels of these attributes compared to adjacent unleveled parcels. \u0000Research highlights: This study highlights the distinct effects that solitary land leveling and land leveling combined with sustainable practices like cover cropping have on soil attributes.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139800483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cadmium concentration in cocoa beans produced in agroforestry systems of small producers in Panama 巴拿马小生产者农林系统生产的可可豆中的镉含量

IF 0.9 4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2024-01-30 DOI: 10.5424/sjar/2024221-20405

Jhon A. Villalaz-Pérez, F. Casanoves, José E. Villarreal-Núñez, Adolfo Santo-Pineda, Abiel Gutiérrez-Lezcano, A. Merino

{"title":"Cadmium concentration in cocoa beans produced in agroforestry systems of small producers in Panama","authors":"Jhon A. Villalaz-Pérez, F. Casanoves, José E. Villarreal-Núñez, Adolfo Santo-Pineda, Abiel Gutiérrez-Lezcano, A. Merino","doi":"10.5424/sjar/2024221-20405","DOIUrl":"https://doi.org/10.5424/sjar/2024221-20405","url":null,"abstract":"Aim of study: To calculate Cd concentration in cocoa plants and evaluate its relationship with available Cd and other soil properties. \u0000Area of study: Almirante, Bocas del Toro province, Panama, in 2020-2021. \u0000Material and methods: The study was carried out in 21 plots of eight cocoa-producing farms. The total area of each sampled plot was 300 m2. Soil samples were taken at a depth of 30 cm, and samples of the leaves and fruits of cocoa trees were also taken. Descriptive statistics and correlation analyses were carried out for soil variables and Cd in plants. The relationship between bioavailable Cd and soil physicochemical variables and between soil variables and Cd in plants was evaluated. Multiple linear regression was performed using the backward selection method. \u0000Main results: The pH was acidic (5.1) and the organic matter content of the soil was greater than 3%, suitable for immobilizing Cd from the soil. Total and bioavailable Cd averaged 0.10 mg kg-1 and 0.02 mg kg-1 respectively. The Cd levels in cocoa leaves exceeded the recommended levels of 0.5 mg kg-1. The Cd concentration in the cocoa bean was low (0.25 mg kg-1). \u0000Research highlights: The levels of bioavailable Cd found do not exceed the United States Environment Agency toxic limits in soil. The level of Cd found in the cocoa bean is below the limit of 0.8 mg kg-1 which is taken as a reference for chocolate, with total dry matter content ≥ 50% of the CODEX Alimentarius.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140485104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Feeding formaldehyde-treated sesame meal to lactating Murciano-Granadina goats: implications on milk yield and composition, digestibility, rumen fermentation, and blood metabolites 给泌乳的 Murciano-Granadina 山羊喂食经甲醛处理的芝麻粉：对产奶量和成分、消化率、瘤胃发酵和血液代谢物的影响

IF 0.9 4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2024-01-30 DOI: 10.5424/sjar/2024221-20274

Fateme Firozi, O. Dayani, R. Tahmasbi, P. Dadvar

{"title":"Feeding formaldehyde-treated sesame meal to lactating Murciano-Granadina goats: implications on milk yield and composition, digestibility, rumen fermentation, and blood metabolites","authors":"Fateme Firozi, O. Dayani, R. Tahmasbi, P. Dadvar","doi":"10.5424/sjar/2024221-20274","DOIUrl":"https://doi.org/10.5424/sjar/2024221-20274","url":null,"abstract":"Aim of study: To investigate the effect of substituting sesame meal (SM) treated with different levels of formaldehyde instead of soybean meal (SBM) on rumen fermentation, milk composition, and hemato-chemical parameters in lactating goats. \u0000Area of study: Kerman, Iran. \u0000Material and methods: Forty Murciano-Granadina goats in mid-lactation were allocated to four groups as a completely randomized design for 56 d. They were fed with diets containing: 1) SBM (control), 2) 12.5% untreated SM, 3) 12.5% treated SM with 0.8 g formaldehyde/100g crude protein (CP), and 4) 12.5% treated SM with 1.2 g formaldehyde/100g CP. \u0000Main results: The goats fed diet containing SM treated with 1.2 g of formaldehyde had greater (p < 0.01) intake of dry matter, CP and metabolizable energy (ME) than other groups. Milk yield and milk protein in goats fed diets containing 1.2 g formaldehyde-treated SM were greater than others (p < 0.01). Fat-corrected milk and total solids in groups fed diets containing formaldehyde-treated and untreated SM were greater than those in control (p < 0.01). Goats fed control diet showed a greater proportion of saturated fatty acids (SFA), and short and medium-chain FA in their milk compared to other groups (p < 0.01). Partial replacement of SBM with formaldehyde-treated or untreated SM increased milk unsaturated FA and long-chain FA (p < 0.01). Goats fed formaldehyde-treated SM had lower acetate production (p < 0.01). \u0000Research highlights: Partial replacement of SBM with formaldehyde-treated SM can be suggested to increase lactating goats' performance without adverse effects on their health.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140484066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of the encapsulation of Lactobacillus acidophilus and Spirulina platensis on carcass yield and meat quality of broilers under heat stress conditions 热应激条件下包裹嗜酸乳杆菌和蓝藻对肉鸡胴体产量和肉质的影响

IF 0.9 4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2024-01-23 DOI: 10.5424/sjar/2024221-20223

Zahra Ranjbarinasab, Mozhgan Mazhari, O. Esmaeilipour, Fatemeh Shahdadi, Arsalan Barazandeh

{"title":"Effects of the encapsulation of Lactobacillus acidophilus and Spirulina platensis on carcass yield and meat quality of broilers under heat stress conditions","authors":"Zahra Ranjbarinasab, Mozhgan Mazhari, O. Esmaeilipour, Fatemeh Shahdadi, Arsalan Barazandeh","doi":"10.5424/sjar/2024221-20223","DOIUrl":"https://doi.org/10.5424/sjar/2024221-20223","url":null,"abstract":"Aim of study: To evaluate the effects of adding Lactobacillus acidophilus (LA), Spirulina platensis (SP) and the encapsulation of LA on the relative weights of carcass parts and meat quality of broilers subjected to heat stress. \u0000Area of study: The work was performed at the University of Jiroft, Iran. \u0000Material and methods: Two hundred forty 1-day-old male broilers (Ross 308) were used in a completely randomized design, with six treatments and four replicates (cages, 10 birds per cage). Dietary treatments included: (i) corn-soybean as control diet (CON), (ii) 0.02% LA, (iii) 1% SP, (iv) 0.02% LA + 1% SP, (v) 0.02% of encapsulated LA, and (vi) 0.02% encapsulated LA + 1% SP. \u0000Main results: The relative weight of the carcass increased in all experimental groups except in the 0.02% LA encapsulated group (p˂0.05). Birds fed diets containing LA+SP (0.02% LA+ 1%SP and 0.02% LA encapsulated+1% SP) had a significantly higher relative weight of the breast (p˂0.05). Dietary supplementation with SP, LA+SP, and encapsulated LA+SP significantly increased water holding capacity and decreased cook loss, respectively (p˂0.05), whereas dietary LA+SP and encapsulated LA+SP decreased drip loss (p<0.05), compared to the CON group. Moisture and pH were not significantly affected by the dietary treatments (p˃0.05). The malondialdehyde content of thigh and breast meat at 30 and 37 days after the slaughter was reduced (p˂0.05) in the SP, LA+SP, and LA encapsulated +SP groups. \u0000Research highlights: Based on results, including LA, SP and encapsulated LA in broilerʼs feeds were effective in improving carcass yield, quality and oxidative stability of broiler meat under heat stress condition.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139603683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Maize yield and grain quality response to foliar-applied phosphorus in a soil testing high in P 在高磷土壤测试中，玉米产量和谷物品质对叶面施肥磷的响应

IF 0.9 4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2024-01-09 DOI: 10.5424/sjar/2024221-19941

A. Limon-Ortega, A. Baez-Perez

{"title":"Maize yield and grain quality response to foliar-applied phosphorus in a soil testing high in P","authors":"A. Limon-Ortega, A. Baez-Perez","doi":"10.5424/sjar/2024221-19941","DOIUrl":"https://doi.org/10.5424/sjar/2024221-19941","url":null,"abstract":"Aim of study: To test the effect of foliar and granular P fertilizer application on maize performance planted under permanent beds from 2012 to 2019 in a soil testing high in P. \u0000Area of study: This field experiment was located in the eastern region of the trans-Mexican volcanic belt. \u0000Material and methods: Three P treatments, foliar and granular (band and broadcast), and a control (0P) plot were allocated in an randomized complete block design in six replications. \u0000Main results: Year-P treatment interaction was significant for yield, agronomic efficiency (AE), and recovery efficiency (RE). Contrastingly, grain quality parameters measured as bulk density and thousand grain weight were only affected by year’s main effect. Yield, AE, and RE were generally more responsive to the foliar than the granular P application. These parameters varied in each treatment according to precipitation accumulated in 40 days during the bracketing-silking period (40d PP) and heat units during the grain filling stage [GDD(t-m)]. As 40d PP increased, yield and AE improved, while RE decreased; as GDD(t-m) increased, yield and grain quality improved. Initial soil available P (46 mg/kg) decreased 26% due to foliar P application. \u0000Research highlights: Results suggest that replacing the granular P with foliar P fertilization is an option to mine soil to an acceptable P level without adverse effects on maize performance.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139441723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development and evaluation of a machine vision-based cotton fertilizer applicator 开发和评估基于机器视觉的棉花施肥机

IF 0.9 4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2024-01-09 DOI: 10.5424/sjar/2024221-20185

Arjun Chouriya, Edathiparambil V. Thomas, Peeyush Soni, Vijay K. Patidar, Laxmikant Dhruw

{"title":"Development and evaluation of a machine vision-based cotton fertilizer applicator","authors":"Arjun Chouriya, Edathiparambil V. Thomas, Peeyush Soni, Vijay K. Patidar, Laxmikant Dhruw","doi":"10.5424/sjar/2024221-20185","DOIUrl":"https://doi.org/10.5424/sjar/2024221-20185","url":null,"abstract":"Aim of study: To develop and assess a cotton fertilizer applicator integrated with a Machine Vision Based Embedded System (MVES) to achieve precise and site-specific fertilization. \u0000Area of study: The investigation was performed in the Indian Institute of Technology, Kharagpur. \u0000Material and methods: The MVES included a cotton detection system with a web camera, processor (computer), and python-based algorithm, and a fertilizer metering control unit with a stepper motor, motor driver, power supply, and microcontroller. The python-based algorithm in the computer predicts the presence (or absence) of cotton plants, whenever an input image is received from the camera. Upon cotton detection, it transforms into a Boolean signal sent to the microcontroller via PySerial communication, which instructs the motor to rotate the metering unit. Motor adjusts the speed of metering unit based on machine speed measured through a hall sensor, ensuring site-specific delivery of metered fertilizer A developed lab setup tested the MVES, experimentally examining performance indicators. \u0000Main results: The MVES obtained a MAPE of 5.71% & 8.5%, MAD 0.74 g/plant & 1.12 g/plant for urea and DAP (di-ammonium phosphate), respectively. ANOVA revealed no statistically significant effect of forward speed on the discharge fertilizer amount (p>0.05). For urea, discharge rates ranged from 1.03 g/s (at 10 rpm, 25% exposure length of metering unit) to 40.65 g/s (at 100 rpm, 100% exposure). DAP ranged from 1.43 to 47.66 g/s under similar conditions. \u0000Research highlights: The delivered application dosage conformed the recommended dosage. The developed MVES was reliable, had a quick response, and worked properly.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139441377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ranking and measuring the dynamics in the reasons-for-buying selected produce 对选定农产品的购买理由进行排序和动态测量

IF 0.9 4区农林科学

Spanish Journal of Agricultural Research Pub Date : 2023-12-22 DOI: 10.5424/sjar/2024221-20282

Ronald W. Ward, Teresa Briz, Leonardo Ortega

{"title":"Ranking and measuring the dynamics in the reasons-for-buying selected produce","authors":"Ronald W. Ward, Teresa Briz, Leonardo Ortega","doi":"10.5424/sjar/2024221-20282","DOIUrl":"https://doi.org/10.5424/sjar/2024221-20282","url":null,"abstract":"Aim of study: Individual purchasing behaviour depends on economics, psychology, marketing and sensory science. Given that the list of reasons-for-buying is almost unlimited, we have defined 14 pre-set descriptors thought to entail the more important attributes when make buying decisions within a food group of selected fruits and vegetables. \u0000Area of study: We have used a United States buyer data base of over 175,000 observations. \u0000Material and methods: Each household was asked to rank their first, second, and third most important reasons for buying, within the set of descriptors. The overriding goal was to gain insight into the attributes and change over time. Using empirical models, the relative importance of the attributes is shown and forecasted for a decade beyond 2021. \u0000Main results: Price and quality were expected to be the main drivers; however, the organic attribute is one requiring significant changes in the production, inspection, distribution and marketing policies, hence considering future expectations for organics is particularly important. \u0000Research highlights: Preferences for organics have grown, but what are the expectations a decade from now? Will that interest remain so for many years to come?","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138946213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0