Variable-rate seeding in soybean according to soil attributes related to grain yield     

da Silva  Eder Eujácio  Baio  Fabio Henrique Rojo  Teodoro  Larissa Pereira Ribeiro  Campos  Cid Naudi Silva  Plaster  Octávio Barbosa  Teodoro  Paulo Eduardo 《Precision Agriculture》2022,23(1):35-51

Precision Agriculture - Defining the ideal soybean stand is essential for obtaining maximum grain yield. As a hypothesis of the work, it was questioned whether it is possible to vary seeding...  相似文献   

Evaluation of an auto-guidance system operating on a sugar cane harvester     

Fábio Henrique Rojo Baio 《Precision Agriculture》2012,13(1):141-147

Precision farming tools such as auto-guidance systems assembled on tractors and/or sugar cane harvester machines are being applied to decrease the costs involved with ethanol production. The purpose of this study was to evaluate the accuracy, the cane loss and the operational field efficiency achieved by an auto-guidance system used to guide a sugar cane harvester over the field when compared to a manually-guided machine. The field test was conducted with two treatments: auto-guidance versus manual guidance; and day versus night. Each treatment was replicated four times. Each position recorded represented a single sample, which was used to calculate the error between the planned and actual paths. It was concluded that the use of an auto-guidance system operating on a sugar cane harvester during the day and night periods increased the field pass-to-pass accuracy relative to the planned row track, but it is essential that the crop was planted using the system. The use of the auto-guidance system did not significantly decrease the sugar cane loss, once the crop was well cultivated. More long-term research needs to be done related to this issue. The operational field efficiency of the cane harvester was the same for both auto-guidance and manual steering systems.  相似文献   

Estimation and evaluation of dynamic properties as indicators of changes on soil structure in sugarcane fields of Sao Paulo State – Brazil     

R.B. Silva  K.P. Lanas  E.E.V. Miranda  F.A.M. Silva  F.H.R. Baio 《Soil & Tillage Research》2009,103(2):265-270

The indiscriminate management and use of soils without moisture control has changed the structure of it due to the increment of the traffic by agricultural machines through the years, causing in consequence, a soil compaction and yield reduction in the areas of intensive traffic. The purpose of this work was to estimate and to evaluate the performance of preconsolidation pressure of the soil and shear stress as indicators of changes on soil structure in fields cropped with sugarcane, as well as the impact of management processes in an Eutrorthox soil structure located in Sao Paulo State. The experimental field was located in Piracicaba's rural area (Sao Paulo State, Brazil) and has been cropped with sugarcane, in the second harvest cycle. The soil was classified by EMBRAPA [EMBRAPA, 1999. Centro Nacional de Pesquisa de Solos. Sistema Brasileiro de Classificação de Solos, Embrapa, Brasília, 412 pp.] as an Eutrorthox. Undisturbed samples were collected and georeferenced in a grid of 60 m × 60 m from two depths: 0–0.10 m (superficial layer – SL) and in the layer of greatest mechanical resistance (LGMR), previously identified by cone index (CI). The investigated variables were pressure preconsolidation (σ_p), apparent cohesion (c) and internal friction angle (). The conclusions from the results were that the SLSC was predicted satisfactorily from σ_p as a function of soil moisture; thus, decisions about machinery size and loading (contact pressures) can be taken. Apparent cohesion (c), internal friction angle () and the Coulomb equation were significantly altered by traffic intensity. The σ_p, c and maps were shown to be important tools to localize and visualize soil compaction and mechanical resistance zones. They constitute a valuable resource to evaluate the traffic impact in areas cropped with sugarcane in State of Sao Paulo, Brazil.  相似文献   

Pneumopericardium,pneumomediastinum, pneumothorax and pneumoretroperitoneum complicating pulmonary metastatic carcinoma in a cat          下载免费PDF全文

V. Greci  A. Baio  L. Bibbiani  E. Caggiano  S. Borgonovo  D. Olivero  P. M. Rocchi  V. Raiano 《The Journal of small animal practice》2015,56(11):679-683

This report describes a case of severe spontaneous tension pneumopericardium with concurrent pneumomediastinum, pneumothorax and retropneumoperitoneum in a cat presenting with dyspnoea and signs of cardiac tamponade secondary to metastatic pulmonary carcinoma. Spontaneous pneumopericardium is an extremely uncommon condition consisting of pericardial gas in the absence of iatrogenic/traumatic causes. In humans, it has been described secondary to pneumonia or lung abscess and very rarely secondary to pulmonary neoplasia.  相似文献   

High?throughput phenotyping of two plant?size traits of Eucalyptus species using neural networks     

Marcus Vinicius Vieira Borges  Janielle de Oliveira Garcia  Tays Silva Batista  Alexsandra Nogueira Martins Silva  Fabio Henrique Rojo Baio  Carlos Ant?nio da Silva Junior  Gileno Brito de Azevedo  Glauce Taís de Oliveira Sousa Azevedo  Larissa Pereira Ribeiro Teodoro  Paulo Eduardo Teodoro 《林业研究》2022,(2):591-599

In forest modeling to estimate the volume of wood, artificial intelligence has been shown to be quite effi-cient, especially using artificial neural networks (A...  相似文献