Testing foliar biofertilizer based on natural fungal extract and nutrients on corn yield

Fluorine (F) produced from the fertilizer factory occurs in the process of phosphate fertilizer production, using sulfur and phosphate rocks as raw materials. Technologies to control atmospheric pollution with F should be adopted to reduce the impact on agricultural production. This study has the hypothesis that the emission of F, derived from the chimneys of fertilizer factories, is influencing the quality of corn (Zea mays L.) and increasing the F levels in the soil and plants. The objective of the study was to monitor the contents of F in corn leaves and soil in properties located close to the fertilizer production industry (between 1.5 and 2.0 km) before and after the installation of scrubber filters in the chimneys of the factory. A field study was carried out during the 2020/2021 harvest to evaluate the contents of F in corn plants and soil. Results showed that the scrubber filter installation represented a F reduction average of 92% in leaves comparing the average before the scrubber filter installation. Corn showed symptoms of F toxicity, such as leaf chlorosis, caused by the disintegration of chloroplasts, inhibition of photosynthesis, and others. In addition, there was a reduction of 40% (from the first to the second collecting) and 75% (from the first to the third collecting) in the levels of F in the soil after the scrubber filter installation. Based on the results, we conclude that the implementation of a scrubber filter is an optimal alternative to reduce F levels in corn leaves and the soil in properties located close to a fertilizer factory.

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Scrubber Filter in the Phosphate Fertilizer Factory Reduces Fluorine Emission and Accumulation in Corn

Silva

Almeida

2023

Air

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Breakeven price of CO2 credits driving farmers to use the area to plant forest instead of grain

Palumbo,

Ferraz-Almeida

2023

Ciênc. Florest.

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Afforestation and reforestation were the challenges the farmer can seize to plant a culture that can capture more carbon than the amount emitted for cultivation. Assuming that the land was legally rented and owned, and part of an area that had not been obtained through recent deforestation, the main questions were: “why a farmer should have preferred to reserve the area to plant trees?”; and “How much did one ton of Carbon Dioxide [CO2] have to be rewarded to buy this opportunity?” This work had the target to estimate which was the minimum price for carbon credit so that the farmer will plant a forest instead of using the soil for grain cultivation. Based on the analysis that economic aspects and profit were the main drivers considered by the farmer to decide how to use the soil in case the area was not classified as Legal Reserve or Permanent Protection Area, seeking the usage which maximized the value per hectare. Considering a eucalyptus commercial forest planted under the premises of the current study, results showed that a price of around 24 BRL per ton of CO2 in 2021 is enough to turn it economically feasible. Business case had been estimated with and without profit coming from the commercial use of forest, and even assuming that no wood is cut and sold, the 2021 price of 40,48 BRL per ton of CO2 can ensure more profit than grain production over 14 years timeframe, allowing the farmer to make money beyond the usual commercial use of a forest.

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Testing foliar biofertilizer based on natural fungal extract and nutrients on corn yield

Cited by 2 publications

References 21 publications

Scrubber Filter in the Phosphate Fertilizer Factory Reduces Fluorine Emission and Accumulation in Corn

Scrubber Filter in the Phosphate Fertilizer Factory Reduces Fluorine Emission and Accumulation in Corn

Breakeven price of CO2 credits driving farmers to use the area to plant forest instead of grain

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