A rentabilidade dos produtores de soja no Paraguai: concentração e exclusão

Wesz, Valdemar João

doi:10.36920/esa-v28n1-7

Cited by 2 publications

(1 citation statement)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to recent reports (FAO, 2011), deforestation affects 60% of the land in the country. The deforested areas are usually used to cultivate annual crops, to produce grain and fodder and to rear livestock (Macedo & Cartes, 2003; Grossman, 2012; Parodi & Enciso, 2017; Junior & João, 2020).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the effects of conservation practices carried out in the 1970s on soil properties in the Eastern Region of Paraguay

2022

View full text Add to dashboard Cite

Soils in subtropical and tropical regions are extremely fragile to perturbations due to their sandy texture, acid nature, low soil organic carbon (SOC) and low cation exchange capacity. In Paraguay, deforestation and subsequent cultivation affect 60% of the land. Certain conservation practices were carried out in the 1970s in response to the important degree of degradation caused by the soil degradative processes.Although the management of crop soils is still very intensive, to date there is no data on how the practices are affecting the sustainability of the system. The objective of this study was to evaluate the chemical and physical properties of three subtropical soils (Ultisol, Alfisol and Oxisol) under different agricultural systems and types of management, aimed at conservation, in the Eastern Region of Paraguay. The agricultural systems differ in the main crop (soybean or maize) and rotation crop (oat, turnip, crotalaria, lupins, maize). The soil properties were compared with those in disturbed natural forests and eucalypt plantations established on former agricultural land. The physical and chemical properties of the soil were determined in the 0 to 40 cm layer.The soils in the disturbed natural forest systems were less acidic and contained more Ca, Mg and K than the cultivated soils. Relative to the seminatural forests, the cultivated soils contained 20 to 40% less SOC and had lower macronutrient reserves and higher bulk density (up to 1.45 g cm À3 ). The SOC was higher in the agricultural systems with oats sown as a rotation crop in winter. By contrast, the N content was higher in systems with lupins or turnips grown in winter. Even when managed using conservation practices (direct sowing, retention of harvest residues, green manure), the soils in the agricultural systems under study displayed signs of physical and chemical degradation. The findings show that these conservation practices are not sufficient to correct the impact of intensive agricultural management.

show abstract

Section: Introductionmentioning

confidence: 99%

Evaluation of the effects of conservation practices carried out in the 1970s on soil properties in the Eastern Region of Paraguay

2022

View full text Add to dashboard Cite

show abstract

Soybean production in Paraguay: Agribusiness, economic change and agrarian transformations

Wesz¹

2021

Journal of Agrarian Change

Self Cite

View full text Add to dashboard Cite

Contemporary corporate‐led agricultural commodity production has seen profound transformations in rural spaces. This article focuses on soybean production in Paraguay, analysing corporate activity in the productive, commercial and economic dynamics of the soybean market and identifies the impacts of this monoculture on small farmers. Drawing on mixed methods, the research points to high levels of concentration of this market in the hands of a few transnational companies, which control the value chain via contractual relations with farmers. Through a complex set of relations, soybean production has seen smallholder farmers fall into debt and become unable to maintain their activity and migrate to new regions, leasing their land and, in the worst cases, lose both their land and status as farmers.

show abstract

A rentabilidade dos produtores de soja no Paraguai: concentração e exclusão

Cited by 2 publications

References 1 publication

Evaluation of the effects of conservation practices carried out in the 1970s on soil properties in the Eastern Region of Paraguay

Evaluation of the effects of conservation practices carried out in the 1970s on soil properties in the Eastern Region of Paraguay

Soybean production in Paraguay: Agribusiness, economic change and agrarian transformations

Contact Info

Product

Resources

About