Tiago Santos Telles

Instituto Agronômico do Paraná | IAPAR · Department of Agricultural Economics

Soil is an essential natural resource for humans and an important part of the environment. However, soil is often used and managed inappropriately, causing its erosion and degradation, with concomitantly negative social, political and economic impacts. This study aimed to discuss sustainable development; and losses and problems caused by soil erosi...

Este estudo teve por objetivo realizar uma revisão sobre as estimativas dos custos da erosão do solo um levantamento de fundamental importância diante das discussões sobre sustentabilidade ao redor do mundo. Para isso, foram elencadas pesquisas sobre os efeitos on-site e off-site e seus respectivos custos. Essas estimativas apontam o montante de re...

Agricultural land prices may be determined by both productive and speculative factors. Among productive factors, investment in soil conservation in areas destined for agricultural activity is recognized as a positive contributor to land value. No-tillage, or no-till, is a farming system that integrates fundamentals of conservation agriculture and o...

Coffee is a crop of significant importance for Brazilian agrobusiness. There is evidence that both the geographic distribution of coffee production, and the varieties of coffee produced, have changed throughout Brazil over the course of time. Furthermore, it appears that these developments are associated with structural changes resulting from reduc...

This paper’s aim is to show that improvements in land governance in Brazil, and particularly in the Amazon region, have been the main pre-condition enabling reductions in deforestation of the Amazon rainforest. Deforestation occurs primarily where property rights are not clearly established, and occurs mostly on land directly or indirectly under st...

This study is a historical overview of land governance initiatives implemented in Parana state, Brazil, since the 1970s, ranging from the work carried out by research institutes to government-sponsored programs. These initiatives encouraged the development of technologies and farmers' widespread adoption of conservation practices. Furthermore, they...

In Brazil, to conserve soil and water, the adoption of a complete array of conservation agriculture technologies in conjunction with contour farming and agricultural terraces is necessary. However, there is little knowledge about the awareness and adoption level of conservationist practices by farmers. In this context, the objective of the study, w...

Crop rotation with species diversification contributes to the control of pests, diseases and weeds and improves soil fertility and conservation, which can lead to increased profitability in grain production systems. The objectives of this study were to determine whether grain production systems that employ crop rotation with species diversification...

This study aims to determine whether spatial effects are determinants of agricultural land prices in Brazil. For this purpose, data on the value of the bare land in municipalities in Brazil for 2020, provided by the Federal Revenue Service, were used. Although this database has national coverage, the contiguous data necessary for the application of...

Este estudo tem como objetivo verificar se os efeitos espaciais são fatores determinantes dos preços das terras agrícolas no Brasil. Para isso, foram utilizados dados do valor da terra nua de municípios do Brasil, para o ano de 2020, disponibilizados pela Receita Federal. Embora a base de dados tenha cobertura nacional, os dados contíguos, necessár...

A cadeia produtiva de citros na região do Vale do Ribeira paranaense passa por um ontexto favorável, com perspectivas de crescimento do cultivo de tangerinas e de outras espécies de citros como a laranja. O cultivo de tangerinas na região apresenta ótima adaptação e tem potencial para se desenvolver e se inserir de forma mais qualificada dentro do...

Background and Aims Crop rotation systems and rhizobial inoculation are strategies to increase yield through organic matter addition and modulation of microbial diversity, yet the extent to which these agricultural practices change soil Bradyrhizobium populations, soybean grain yield and economic benefits to farmers are unclear. Thus, this study ai...

Crop rotations with high plant diversity and biomass input have been recognized worldwide as a crucial practice for increasing the sustainability of grain production systems, particularly in regions under no-tillage (NT) management. Nonetheless, low-diversity grain production systems based on double cropping (two crops in the same agricultural year...

Conservation practices preserve soil quality and may also increase the value of agricultural land. The economic benefits of conservation practices include increased agricultural yields, decreased risk of production losses from weather events, decreased number of farming operations, simplification of farm management, and decreased production costs....

The objective of this study was to investigate the dynamics of the economically active population (EAP) employed in agricultural activities in the Central‐West region in Brazil, between 2004 and 2015. Based on microdata from the National Household Sample Survey, we analyzed the agricultural EAP according to occupation, gender, age, schooling, agric...

In some rural properties of Brazil, soil and water conservation practices are partially or inappropriately implemented, intensifying soil erosion, even in no-tillage (NT) areas. This study aimed to check the farmer's understanding of conservation agriculture (CA) and assess whether they are using practices appropriate to soil conservation. A basin...

The aim of this study was to provide a bibliometric analysis and mapping of existing scientific papers, focusing on microalgae cultivation coupled with biomass production and bioremediation of wastewater from agricultural industries, including cassava, dairy, and coffee. Using the Web of Science (WoS) database for the period 1996–2021, a search was...

This chapter describes the origins and current status of CA as well as NT and the NTS in Brazil, Argentina, Paraguay, Uruguay and Bolivia. These represent the top five CA countries with about 99% of the area under CA cultivation in South America.

Microalgae growing using wastewater from agro-industry for both bioremediation and biomass production has high potential. Wastewater from industrial processing of instant coffee (WIC), dairy products (WDP), and cassava flour/starch (WCF) were used to grow Chlorella sorokiniana in five batches with different hydraulic retention times (HRT). For WIC...

The milk production chain has relevance for the Brazilian economy, generating jobs and income. In addition, milk production, because of family-based farms, has an important social function. However, milk production is spatially heterogeneous in Brazil, especially due to the different technological patterns of production. In this context, the object...

Questões relacionadas aos empreendimentos agrícolas vêm sendo discutidas em todo o mundo, o que ocorre pela importância deles no desenvolvimento econômico das nações, por estarem diretamente relacionados às transformações sociais dentro e fora do campo e por serem imprescindíveis para a produção e a oferta de alimentos, bem como para a segurança al...

Plant spacing influences the yield of Arabica coffee cultivars and impacts profitability; however, there are few studies on it. Thus, the objective of this study was to evaluate the yield and economic performance of Arabica coffee cultivars at different plant spacings. The experiment, conducted in Mandaguari, Paraná, Brazil, used a randomized block...

CONTEXT Integrated crop-livestock systems have been encouraged worldwide as they align with the principles of cleaner production. However, studies on these systems have mainly explored agronomic and environmental indicators; thus, fewer studies have been conducted considering an economic perspective, particularly when trees are introduced. OBJECTI...

Firewood and charcoal are widely used as solid fuels in thermal, mechanical, and electrical energy generation processes in Brazil. Their production comes from silviculture or extractivism. The objective of the present study is to verify whether the expansion of forestry crops, mainly of eucalyptus, has changed the structural and spatial dynamics of...

Diversifi ed crop rotation is an option for expanding producer incomes, and its adoption has presented a series of agronomic advantages compared to less diversifi ed crop rotation systems. In this context, the objective of this study was to verify if higher-diversifi ed crop rotation systems perform economically better than low-diversifi ed ones. T...

Huanglongbing (HLB) is considered one of the main citrus diseases; it spreads quickly through orchards, reducing the production and quality of the fruit of affected plants, and causes significant economic losses. In this context, the aim of this study was to estimate the incidence and economic impact of the losses generated by HLB in the micro-regi...

The aim of this study is to provide a bibliometric analysis and mapping of existing scientific papers, focusing on microalgae cultivation coupled with biomass production and bioremediation of wastewater from cassava, dairy, and coffee industries. Using the Web of Science (WoS) database for the period 1996–2019, a search was performed using a keywor...

Brazil is one of the countries in which the practice of No-Tillage (NT) has been most widely implemented as one of the three fundamental ecological principles of Conservation Agriculture (CA), crucial for the sustainability of the national agriculture. The first official data on the use of this practice were collected in the Agricultural Census of...

In 2009, Brazil has committed to reducing greenhouse gas (GHG) emissions. Since then, the National Policy on Climate Change has been instituted. In 2010, it was elaborated the Sector Plan for Mitigation and Adaptation to Climate Change for the consolidation of a Low-Carbon Economy in Agriculture (ABC Plan). The actions of the ABC Plan sought to rec...

Coffee is among the main agricultural crops in Paraná state. However, after this crop retraction, mostly due to the difficulties with crops recovery after the 1975 “Black Frost” and other crops expansion in the territory, such as soybeans, corn and wheat, there was a significant change in the spatial dynamics and structure of agricultural productio...

This chapter presents general aspects regarding microalgae biology and growth under ex situ conditions. Emphasis is given on some aspects of microalgae responses to major environmental and nutritional factors, for example, temperature, light, nutrients, and pH. Then, management of photobioreactor systems where microalgae are grown to achieve the ob...

The Brazilian state of Paraná is one of the leading producers of maize. However, expansion of soybean cropping has caused a drop in maize production and could have impacted production systems. The aim of the study was to verify the evolution and identify the structure, spatial dynamics and transformation of maize and soybean production systems in t...

Crop rotation is one of the pillars of conservation agriculture. This practice has offered a series of advantages in terms of improving soil physical, chemical, and biological conditions. These advantages result in yield increases for all economic crops involved in the rotation systems and may also reduce production costs. In this context, the aim...

In Brazil, soybean have been grown in production systems with a low plant species diversification. However, these systems are becoming less efficient and sustainable. This study therefore evaluated the profitability of soybean production systems, as a function of the degree of diversification of crops grown in the winter period. We conducted an exp...

The aim of this study was to verify the dynamics of milk production in Southern Brazil, analyzing the spatial distribution, evolution and structure of bovine milk production systems in the dairy-specialized microregions. To this end, annual data from 2000 to 2015 are drawn from the Municipal Livestock Survey, reported by the Instituto Brasileiro de...

The no-tillage system participatory quality index aims to evaluate the quality and efficiency of soil management under no-tillage systems and consists of a weighted sum of eight indicators: intensity of crop rotation, diversity of crop rotation, persistence of crop residues in the soil surface, frequency of soil tillage, use of agricultural terrace...

Even in areas of predominance of Caiuá sandstone, with soils of low natural fertility that are highly susceptible to erosion and degradation processes, farmers have adopted systems with little diversification, because they believe that they provide a greater economic return. However, agricultural practices such as crop rotation can bring agronomic...

The aim of this study was to identify and qualify the microregions specialized in orange production and the spatial dynamics of citrus production in the state of Paraná, Brazil. For this purpose, data from the Brazilian Institute of Geography and Statistics and the Brazilian Central Bank were used. The location quotient (LQ) methodology was applied...

In this chapter, an overview on sustainable bioenergy will be given with emphasis on biodiesel and biogas production. The major aims highlight the challenges of renewable clean energy production, which are several, ranging from the production of nonedible oil seeds as source of bioenergy, in the other words, raw materials should not compete with fo...

In this paper some properties of the so-called exponentiated uniform distribution are derived and discussed, such as quantile function, moments, generating function, mean deviations, Bonferroni and Lorenz curves, Shannon and Rényi entropies. The proposed model, defined in the range [a, b] can be used as an alternative to the truncated models. The m...

The intensive cultivation of microalgae is an alternative for the sustainable and clean production of energy, protein, and pigments, particularly when associated with agribusiness and wastewater treatment. Intensive microalgae cultivation aims to mitigate environmental risks and microalgae by-products add value to the production chain. However, stu...

The aim of this study was to determine how often rural farmers in a watershed use no-tillage systems combined with crop rotation, contour farming and agricultural terraces. The study area was Paraná Watershed III (PB3) in the western region of Paraná State, and data from the 2006 Agricultural Census of the Brazilian Institute of Geography and Stati...

The adoption of conservation agriculture (CA) practices are essential for soil and water conservation. In CA, farmers must adopt no-tillage (NT) with crop rotation to maintain a permanent soil cover. In Brazil, mainly in the South region, for CA to be more efficient, practices such as contour farming and agricultural terraces should also be adopted...

Issues related to farms have begun to be discussed in a global context due to their importance in the economic development process, as they have a direct impact on the social transformations within and away from the countryside and are an important part of the system ensuring the food supply and food security for the population. Thus, the aim of th...

The aim of this study was to analyze technical and economic indicators of family milk production systems, with different technology levels, in the Caiuá sandstone area in Northwestern Paraná, Brazil. The analysis period covers the agricultural years 2002/2003 to 2013/2014. The categorization of the milk production systems was based on information f...

Resumo As investigações sobre os determinantes dos preços das terras agrícolas, bem como a análise do mercado de terras, são temas recorrentes na história do pensamento econômico. Nesse sentido, o objetivo deste estudo é investigar os conceitos sobre esses determinantes e, de forma mais específica, sistematizar o pensamento econômico sobre o mercad...

The objective of this study was to verify and characterize the spatial distribution of microregions specialized in bovine milk production in Brazil's Southern Region. Data from the Municipal Livestock Survey of the Brazilian Institute of Geography and Statistics, and the National Strengthening Program of Family Agriculture of the Central Bank of Br...

In economic literature has numerous hypotheses about what are the determinants of land prices. In Brazil, since the 1970s, studies on this topic have been carried out, however there is no consensus on this issue. Part of the literature considers that productive factors, related to the profitability of agricultural activities are the main determinan...

Retaining sugarcane straw over the soil after harvesting can improve soil structure and increase soil carbon stabilization, mainly in macroaggregates. We evaluated the carbon content in the aggregate classes in areas under burn and no-burn (adopted for five years) sugarcane management systems, focusing on the superficial layer (0.00-0.20 m). The ex...

In general, the technical and agronomic benefits of no-till farming are widely known and well documented in the literature. However, studies focusing on the economics of no-tillage are scarce. In this context, the objective of this study is to determine whether no-till grain production systems that follow the principles of conservation agriculture...

Background Brazil is the world’s largest sugarcane producer, and its production is concentrated in south-central and northeast regions, particularly in the state of São Paulo. The land use change, principally from the increasing sugarcane production, may reflect in the farmland prices. The aim of this study is to evaluate the extent to which agricu...

The aim of this study was to analyze trends in farmland prices in Paraná, between 1998-2015. For this purpose, from a conjectural analysis, Paraná State farmland prices were used. In addition, the correlation among variables of main determinants of farmland prices in Paraná State (gross Production Value, rural credit, exchange rate, interest rate a...

The aim of the present study is to evaluate the economic viability of tomato cultivation in a system of organic farming, and to compare it with the conventional farming system. The fixed and variable costs of both cultivation systems were calculated, as well as the costs of disease control with the application of alternative products and pesticides...

The aim of the present study is to evaluate the economic viability of tomato cultivation in a system of organic farming, and to compare it with the conventional farming system. The fixed and variable costs of both cultivation systems were calculated, as well as the costs of disease control with the application of alternative products and pesticides...

O objetivo deste artigo é apresentar um panorama da Iniciação Científica(IC) e do PIBIC nas universidades estaduais do Paraná, focando principalmente a Universidade Estadual de Londrina (UEL), entre 1995 e 2005. Para tanto, a partir dos Anais dos Encontros Anuais de Iniciação Científica (EAIC), é possível observar que a IC se institucionaliza de fo...

O presente estudo teve por objetivo analisar a evolução da população economicamente ativa (PEA) ocupada, por situação de domicílio, sobretudo rural, em setor de atividade, agrícola e não agrícola, nas Grandes Regiões do Brasil, entre 2001 e 2009. Verificou-se um declínio da PEA rural ocupada em atividades agrícolas nas Grandes Regiões consideradas...

The aim of this study was to verify and characterizes the spatial distribution of the microregions specialized in bovine milk production in Paraná State, Brazil, using data from the Municipal Livestock Survey conducted by the Brazilian Institute of Geography and Statistics and the Central Bank of Brazil’s National Program to Strengthen Household Ag...

Vinasse is a potassium-rich waste generated in large amounts by the ethanol production that, applied in the soil, can promote changes in water dispersible clay and in its physical quality. The aim of this study was to evaluate the clay dispersion of Oxisols after vinasse application and correlate it with some chemical attributes. Samples were colle...

The dairy farming of Parana features a very heterogeneous production among its mesoregions. Hence, the scope of this study is to characterize spatially the regions dedicated to the activity of dairy farming in Parana, in 2005 and 2011. In this regard, we use the exploratory spatial data analysis (ESDA) as the methodology to verify the presence of s...

The present study aims to evaluate crop, pasture and forest land prices in Brazil, between 1994 and 2010, in the light of Post-Keynesian theory. The results provide evidence that land, more than just a simple factor of production, must be conceived of as an economic asset. In fact, the price of rural land is determined not only by the expected prof...

Remote sensing and geographic information systems (GIS) with applied digital image-processing (DIP) techniques are essential tools for maintaining land-use records over time. The sugar-ethanol industry has increased over the last 30 years in areas of the Paranapanema Valley in the Western São Paulo Plateau, which is considered one of the last major...

Remote sensing and geographic information systems (GIS) with applied digital image-processing (DIP) techniques are essential tools for maintaining land-use records over time. The sugar-ethanol industry has increased over the last 30 years in areas of the Paranapanema Valley in the Western São Paulo Plateau, which is considered one of the last major...