Engenharia Agricola最新文献_第3页

SOIL COVER IS STRATEGIC TO REMEDY EROSION IN SANDY SOILS 土壤覆盖是弥补沙质土壤侵蚀的重要手段

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-04-17 DOI: 10.1590/1809-4430-eng.agric.v43n1e20220047/2023

D. L. Flumignan, Lidiane D. Gomes, A. V. A. Motomiya, G. Q. D. Oliveira, Paulo S. Vieira Filho

引用次数: 0

CULTIVATION OF XARAÉS GRASS IRRIGATED WITH IRON MINING TAILINGS 铁尾矿灌溉草地xaraÉs的栽培

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-04-14 DOI: 10.1590/1809-4430-eng.agric.v43n1e20210170/2023

S. Ribeiro, R. A. D. Oliveira, F. F. Cunha, P. Cecon, J. T. D. Oliveira

{"title":"CULTIVATION OF XARAÉS GRASS IRRIGATED WITH IRON MINING TAILINGS","authors":"S. Ribeiro, R. A. D. Oliveira, F. F. Cunha, P. Cecon, J. T. D. Oliveira","doi":"10.1590/1809-4430-eng.agric.v43n1e20210170/2023","DOIUrl":"https://doi.org/10.1590/1809-4430-eng.agric.v43n1e20210170/2023","url":null,"abstract":"The collapse of the Fundão dam in Brazil caused one of the biggest environmental disasters. One of the challenges was how to manage the tailings so that affected areas could be reused. This study aimed to verify whether applying different irrigation depths to Xaraés grass grown with iron mining tailings would affect grass shoot and root dry masses. The experiment was set up in a randomized design with five irrigation depths (40%, 60%, 80%, 100%, and 120% of crop evapotranspiration) and two additional treatments (grass grown in tailings with soil conditioner, and grass grown in natural soil), each with three repetitions. The grass was cut four times, and the shoot dry mass was evaluated after each cut, while the root dry mass was evaluated at the end of the experiment. Our results showed that irrigation depths had a positive linear effect on shoot dry mass and an exponentially increasing effect on root dry mass, with the highest averages in the treatment applying 120% of crop evapotranspiration. This study showed that even in adverse conditions, Xaraés grass was able to grow and develop well.","PeriodicalId":49078,"journal":{"name":"Engenharia Agricola","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67257401","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

VIBRATION TRANSMISSIBILITY OF THE COFFEE FRUIT-PEDUNCLE SYSTEM: A FORCED VIBRATION STUDY OF HIGH FREQUENCY AIMING MECHANICAL HARVESTING 咖啡果柄系统的振动传递性:高频瞄准机械采收的强制振动研究

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-04-03 DOI: 10.1590/1809-4430-eng.agric.v43n1e20210201/2023

G. P. Villibor, F. L. Santos, D. M. Queiroz, J. K. Khoury Junior, F. Pinto

{"title":"VIBRATION TRANSMISSIBILITY OF THE COFFEE FRUIT-PEDUNCLE SYSTEM: A FORCED VIBRATION STUDY OF HIGH FREQUENCY AIMING MECHANICAL HARVESTING","authors":"G. P. Villibor, F. L. Santos, D. M. Queiroz, J. K. Khoury Junior, F. Pinto","doi":"10.1590/1809-4430-eng.agric.v43n1e20210201/2023","DOIUrl":"https://doi.org/10.1590/1809-4430-eng.agric.v43n1e20210201/2023","url":null,"abstract":"Semi-mechanized and mechanized harvesting use machines that promote the transference of vibrational energy and impact to achieve the detachment of coffee fruits. The aim of this study was to evaluate the vibration transmissibility in coffee fruit-peduncle systems, using high-speed cameras, submitted to high frequency harmonic excitation in different combinations between frequency and amplitude of vibration, identifying working ranges suitable to perform selective harvesting. Vibration transmissibility was determined for the coffee fruit-peduncle systems, for the maturation stages unripe and ripe that were subjected to a sinusoidal harmonic displacement, in which the input parameters were frequency (35, 45 and 55 Hz) and peak-to-peak amplitude (3.5, 5.0 and 6.5 mm). An experiment was used to study the effect of frequency and amplitude on vibration transmissibility in a completely randomized design in a factorial scheme 3 x 3 x 2, with three replications. The frequency of 35 Hz, associated with the amplitudes 3.5-6.5 mm, was the one that most influenced the results of vibration transmissibility. For the frequency of 55 Hz and amplitude of 6.5 mm, in the ripe maturation stage, the vibration transmissibility was higher than 1.0, which could be a suitable combination for selective coffee harvesting.","PeriodicalId":49078,"journal":{"name":"Engenharia Agricola","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67257415","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

NUTRITIONAL ACCUMULATION FOR SALAD AND ITALIAN TOMATOES GROWN IN A PROTECTED ENVIRONMENT 在保护环境下种植的沙拉和意大利番茄的营养积累

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-04-03 DOI: 10.1590/1809-4430-eng.agric.v43n1e20210206/2023

A. M. Duart, G. S. Mattar, Thais Q. Z. Cesar, F. Sala, L.F.V. Purquerio

引用次数: 0

Stabilization of an MQ-3 Sensor for Ethanol Measurement in Cowpea Seeds MQ-3型豇豆种子乙醇含量传感器的稳定性研究

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-04-01 DOI: 10.1590/1809-4430-eng.agric.v43n2e20200046/2023

J. A. Cavalcante, Augusto H. M. Silva, G. I. Gadotti, Ádamo S. de Araújo, R. D. C. M. Monteiro

{"title":"Stabilization of an MQ-3 Sensor for Ethanol Measurement in Cowpea Seeds","authors":"J. A. Cavalcante, Augusto H. M. Silva, G. I. Gadotti, Ádamo S. de Araújo, R. D. C. M. Monteiro","doi":"10.1590/1809-4430-eng.agric.v43n2e20200046/2023","DOIUrl":"https://doi.org/10.1590/1809-4430-eng.agric.v43n2e20200046/2023","url":null,"abstract":"The widespread adoption of sensor technology has made it a standard practice for obtaining precise and timely information during the harvest and post-harvest periods. One sensor that has gained popularity for post-harvest seed monitoring is the MQ-3, which identifies ethanol in the air as products undergo fermentation. However, these sensors typically require a stable operation. This study aimed to assess the stabilization time of an MQ-3 sensor when measuring ethanol levels in anaerobic bean seeds. We used six bean seed samples, each with an average moisture content of around 14%. We employed a completely randomized experimental design with nine repetitions for each sample. Every repetition consisted of 25 bean seeds placed in sealed flasks containing 70 mL of distilled water. This setup induced anoxic conditions within the flask, promoting anaerobic respiration in the seeds. After 24 hours, we exposed an air sample to the MQ-3 sensor and took readings at various time intervals (12-14, 19-21, 36-38, 68-70, 130-132, 192-194, 314-316, 616-618 seconds). The average stabilization time for the MQ-3 sensor while quantifying ethanol concentrations in the bean samples were approximately 23 seconds. The sensor demonstrated efficacy, convenience, and rapidity in assessing ethanol levels in anaerobic bean seeds.","PeriodicalId":49078,"journal":{"name":"Engenharia Agricola","volume":"47 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67257309","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

CAN ACCURACY ISSUES OF LOW-COST SENSOR MEASUREMENTS BE OVERCOME WITH DATA ASSIMILATION? 低成本传感器测量的精度问题能否通过数据同化来克服?

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-03-01 DOI: 10.1590/1809-4430-eng.agric.v43n2e20220170/2023

Monique P. G. de Oliveira, Thais Q. Zorzeto-Cesar, R. Attux, Luiz H. A. Rodrigues

{"title":"CAN ACCURACY ISSUES OF LOW-COST SENSOR MEASUREMENTS BE OVERCOME WITH DATA ASSIMILATION?","authors":"Monique P. G. de Oliveira, Thais Q. Zorzeto-Cesar, R. Attux, Luiz H. A. Rodrigues","doi":"10.1590/1809-4430-eng.agric.v43n2e20220170/2023","DOIUrl":"https://doi.org/10.1590/1809-4430-eng.agric.v43n2e20220170/2023","url":null,"abstract":"The use of mechanistic plant growth models relies on the availability of high-quality inputs to reduce uncertainty in estimates. Measurements of photosynthetically active radiation inside a protected environment are either more expensive to obtain or dependent on assumptions regarding external measurements. This study aimed to reduce the influence of uncertainty in the measurements of low-cost lux meters by using a data assimilation strategy. We first determined, by simulation, the impact of different sensors on the estimates. We then used the Ensemble Kalman Filter to assimilate artificial observations of tomato growth in the Reduced-State Tomgro model, in simulations for which the solar radiation inputs were obtained from a low-cost lux meter. We compared the assimilated estimates to the simulations that used solar radiation obtained with a scientific-grade quantum sensor. For periods of larger radiation intensity, in which the differences in measurements from both instruments are larger, assimilation of observations with low errors lead to estimates that are closer to the ones obtained by scientific grade sensors. These results suggest that low-cost sensors could be used to obtain inputs for growth models in protected environments, provided there are also imperfect observations of the state.","PeriodicalId":49078,"journal":{"name":"Engenharia Agricola","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67257449","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

LIGHT RAIN CHARACTERIZATION IN PIRACICABA, SÃO PAULO STATE, BRAZIL 皮拉西卡巴的小雨特征，sÃo保罗州，巴西

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-02-27 DOI: 10.1590/1809-4430-eng.agric.v43n1e20220005/2023

Fabio T. Johanson, A. J. Farias-Ramírez, M. A. Jacomazzi, S. N. Duarte, M. A. Moreno-Pizani

引用次数: 0

CALIBRATION OF THE CROPWAT MODEL FOR THE STUDY OF SOYBEAN PRODUCTION SYSTEMS 用于大豆生产系统研究的作物模型的校正

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-02-01 DOI: 10.1590/1809-4430-eng.agric.v43n1e20220059/2023

Lidiane D. Gomes, D. L. Flumignan, É. Comunello, R. García

引用次数: 0

MOISTURE LIMITS AND POTASSIUM CONCENTRATIONS IN THE SOIL SOLUTION FOR CULTIVATION OF LISIANTHUS (Eustoma grandiflorum) FERTIGATED UNDER PROTECTED ENVIRONMENT CONDITIONS 保护条件下栽培桔花土壤溶液的水分限制和钾含量

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-01-30 DOI: 10.1590/1809-4430-eng.agric.v43n1e20220133/2023

O. N. D. SOUSA NETO, P. H. V. Rodrigues, S. N. Duarte, Pedro R. F. Sampaio, N. S. Dias

{"title":"MOISTURE LIMITS AND POTASSIUM CONCENTRATIONS IN THE SOIL SOLUTION FOR CULTIVATION OF LISIANTHUS (Eustoma grandiflorum) FERTIGATED UNDER PROTECTED ENVIRONMENT CONDITIONS","authors":"O. N. D. SOUSA NETO, P. H. V. Rodrigues, S. N. Duarte, Pedro R. F. Sampaio, N. S. Dias","doi":"10.1590/1809-4430-eng.agric.v43n1e20220133/2023","DOIUrl":"https://doi.org/10.1590/1809-4430-eng.agric.v43n1e20220133/2023","url":null,"abstract":"Lisianthus ( Eustoma grandiflorum ) has been attracting great interest due to the beauty of the colors of flowers, the firmness of stems, and postharvest durability. However, knowledge of lisianthus irrigation and fertigation has generally been based on recommendations from other countries. This study aimed to establish parameters for the rational management of lisianthus fertigation under a protected environment by determining the best lower limit of soil moisture, associated with the determination of the optimal potassium concentration to be maintained in the soil solution. The treatments consisted of five soil moisture limits for the start of irrigation and maintenance of five potassium concentrations in the soil solution, with four replications. Plots of 0.7 by 0.5 m were arranged in a completely randomized block design in a factorial scheme. The soil solution was monitored by measuring moisture as well as potassium (K + ) concentrations using a TDR100 reflectometer and solution extractors, respectively, during two cycles. The evaluated variables were the leaf area index, shoot fresh and dry matter, commercial yield, and average stem diameter. Lisianthus cultivation under the lower limit of soil moisture equal to 0.20 cm 3 cm −3 ensured the best results for all variables of commercial interest. No effect of potassium concentrations was observed on variables of commercial interest.","PeriodicalId":49078,"journal":{"name":"Engenharia Agricola","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67257263","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

ORBITAL REMOTE SENSING FOR THE MANAGEMENT OF AREAS IRRIGATED WITH A CENTRAL PIVOT SYSTEM 轨道遥感用于中央枢纽系统灌溉地区的管理

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-01-06 DOI: 10.1590/1809-4430-eng.agric.v43n1e20220109/2023

W. K. O. Moreira, M. Maggi, L. Venancio, C. L. Bazzi, I. S. Santos

{"title":"ORBITAL REMOTE SENSING FOR THE MANAGEMENT OF AREAS IRRIGATED WITH A CENTRAL PIVOT SYSTEM","authors":"W. K. O. Moreira, M. Maggi, L. Venancio, C. L. Bazzi, I. S. Santos","doi":"10.1590/1809-4430-eng.agric.v43n1e20220109/2023","DOIUrl":"https://doi.org/10.1590/1809-4430-eng.agric.v43n1e20220109/2023","url":null,"abstract":"Irrigated agriculture is considered one of the most important techniques for agricultural production in the world, despite being the sector that uses water resources the most. Thus, technological advances have been constantly developed and applied in the sector as a way to improve water management and reduce its consumption, considering that some cultures are affected by economic costs and feasibilities of production, because the water cost has increased significantly in recent years. Remote sensing is a technology that has provided good results for estimating evapotranspiration (ETr) in producing areas, enabling more efficient irrigation management for low costs. This study aimed to answer the question about how the generation of irrigation management zones (IMZs) can be used to optimize water use and improve irrigation systems and which ETr models are better for it. Three ETr estimation models (Surface Energy Balance Algorithm for Land [SEBAL], Mapping Evapotranspiration at High Resolution and with Internalized Calibration [METRIC] and Simple Algorithm for Evapotranspiration Retrieving [SAFER]) were used to design IMZs in center pivot cultivated with cotton. The design of IMZs with ETr data proved to be a viable alternative, making it possible to improve water management in irrigated systems, reducing costs with viability irrigation for cotton and others cultures. The METRIC method displayed the greatest ease in obtaining the data used in the ETr estimation for generating the IMZs.","PeriodicalId":49078,"journal":{"name":"Engenharia Agricola","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67257182","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