Gabriel Araujo

Coffee is a key agricultural product in national and international markets. Physiological parameters, such as plant growth indicators, can signal interruptions in these processes. This study aimed to characterize the temperature obtained by a thermal camera embedded in a remotely piloted aircraft (RPA) and evaluate its relationship with the water potential (WP) and stomatal conductance (gs) of an experimental coffee plantation using geostatistical techniques. The experiment was conducted at the Federal University of Lavras, Minas Gerais, Brazil. A rotary-wing RPA with an embedded thermal camera flew autonomously at a height of 10 m and speed of 10 m/s. Images were collected on 26 November 2019 (rainy season), and 11 August 2020 (dry season), between 9:30 am and 11:30 am. Data on gs and WP were collected in the field. The thermal images were processed using FLIR Tools 5.13, and temperature analysis and spatialization were undertaken using geostatistical tools and isocolor maps by Kriging interpolation in R 4.3.2 software. Field data were superimposed on final crop temperature maps using QuantumGIS version 3.10 software. The study found that with decreasing WP, stomatal closure and reduction in gs occurred, increasing the temperature due to water deficit. The temperature distribution maps identified areas of climatic variations indicating water deficit.

Lula in an X post shared a picture of himself smiling next to Padilha and his top foreign policy adviser, Celso Amorim, during a meeting on Monday.

Lula underwent fresh medical exams on Friday, which showed he is in “stable” condition after a fall that cause trauma to the back of his head, requiring stitches and resulting in a small brain hemorrhage.

Azul has reached a deal with its existing group of bondholders to obtain additional financing, the Brazilian airline said on Monday, as part of restructuring it expects to ease market concerns about its high debt load. Under the deal with bondholders, the carrier said in a securities filing that Azul will receive $150 million this week and another $250 million by year-end in fresh debt, totaling the $400 million it had been targeting. Reuters reported last week, citing sources, that Azul was in talks with multiple parties to raise about $400 million in fresh capital via debt financing and that an agreement was near.

Currently, Brazilian coffee farming seeks the rational use of resources through sustainable practices. As a result, the development of machinery with more efficient input application systems and the adoption of precision agriculture techniques have been yielding excellent results. This study was divided into two stages, with the first involving the adaptation of a solid fertilizer application machine with fixed doses, allowing dose variation using an electronic controller. The second stage consisted of conducting trials and their applications under operational conditions. The results confirmed that the developed system remained stable in terms of variable-rate fertilizer distribution for coffee cultivation. The machine's lateral fertilizer distribution range met the demands of coffee farming satisfactorily. In field conditions, the developed system exhibited an average error of −2.9%, compared to the programmed doses, validating the accuracy of the machine and its suitability for use in coffee plantations.

By Gabriel Araujo SAO PAULO (Reuters) - Electric aircraft maker Eve has obtained a $50 million loan from Citibank, strengthening its balance

Oscar Piastri beat title-chasing McLaren team mate Lando Norris to pole position in qualifying for the Sao Paulo Grand Prix sprint on Friday with Red Bull's Formula One leader Max Verstappen fourth fastest.

SAO PAULO (Reuters) - Oscar Piastri beat title-chasing McLaren team mate Lando Norris to pole position in qualifying for the Sao Paulo Grand Prix sprint on Friday with Red Bull's Formula One leader Max Verstappen fourth fastest.

Argentines have taken over Sao Paulo's atmospheric Interlagos circuit to support Franco Colapinto in his first Formula One race in South America, with the Williams driver looking to secure a seat for 2025.

Nov 11 (Reuters) - Embraer ( ERJ ) does not view the election of Donald Trump as a setback for its efforts to