Catálogo de publicaciones - revistas

<jats:title>Abstract</jats:title><jats:p>This paper reviews and analyzes the impact of residue burning on the environment and human health, and the influence of ex-situ and in-situ residue management on reducing pollution and improving soil health, crop yield, and farmers’ economic benefits. Paddy is cultivated on 43.8 Mha in India, producing 118.43 Mt grain and an estimated 165.8 Mt straw. Burning is the most common practice for managing rice crop residues mainly due to its simplicity, low cost, increased mechanical harvesting, short window between rice harvest and wheat sowing, and lack of viable uses for residues. Around 50 Mt of rice straw is burned annually, nearly half of which occurs in northwestern India during October/November. Burning residue is a major contributor to air pollution, emitting around 1.5 Mt particulate matter, 150 Mt carbon dioxide, and other greenhouse gases (e.g., NO<jats:sub>2</jats:sub>, SO<jats:sub>2</jats:sub>, CO, CH<jats:sub>4</jats:sub>, NH<jats:sub>3</jats:sub>) and volatile organic compounds, resulting in a wide range of respiratory infections in humans, reduced soil nutrient and carbon inputs, and disturbed soil microbial activity. In-situ residue management using a Happy Seeder, Super straw management system, paddy straw chopper cum spreader, reversible moldboard plow, or no-till seeder incorporates or mulches residues, avoiding burnings. These operations are economically profitable as they reduce costs, increase yields, or both. In-situ residue management, i.e., incorporation or mulching improves the soil’s physical, chemical and biological properties and is considered better for improving soil health than residue removal. Ex-situ residue management for biofuel, biochar, electricity generation or bale making is also profitable for the environment and reduces pollutant emissions.</jats:p>

<jats:title>Abstract</jats:title><jats:p>Most studies on climate change’s impacts on agriculture focus on modeling techniques based on large-scale meteorological data, while few have investigated how farmer’s perception of climate change’s impacts can affect crop diversity and crop management practices, especially in industrialized contexts. To fill this gap, we conducted 24 semi-structured interviews in a study site located in the Catalan Pyrenees. Our results show for the first time in an industrialized context that farmers perceive multiple interrelated climate change impacts on local agroecosystems. For instance, snowfall and freeze events have decreased, which respondents associated with the increase of pests and diseases affecting both wild flora and cultivated plants. Similarly, changes in precipitation patterns lead to a perceived decrease in useful rain for agriculture. Farmers are also reporting changes in their management practices, such as increased irrigation or use of pesticides, which respond to these climatic factors but also to changes in the crops that are cultivated. Crop diversity is in decline in the area both at the species and landrace levels, especially in rainfed fields. This is mainly driven by socioeconomic factors such as agricultural abandonment or access to commercial seeds, although climate change factors such as increased pests or decreased rainfall can have an impact. Despite the crop diversity losses found, many landraces have been maintained, mainly due to their cultural value, and also new crop species have been introduced, which are now viable due to the increase in temperature. Although we focused on a specific case study, we found several trends that are also present in other contexts. Therefore, the results of this research are relevant at a global scale since they show that climate change is affecting mountain agroecosystems in industrialized contexts and may affect more drastically both agrobiodiversity and crop management practices in agroecosystems worldwide.</jats:p>

<jats:title>Abstract</jats:title><jats:p>A better understanding of gendered perception on the prevalence and management of pests in irrigated agriculture in the context of a changing climate can help recommend more gender-sensitive policies, particularly in smallholder farming systems. Limited studies have been conducted to assess gender differences in perception of the prevalence and management of pests among smallholder irrigation schemes especially in Zimbabwe. This study is the first one to assess gendered perceptions on the change in prevalence and management of pests in Exchange, Insukamini, and Ruchanyu irrigation schemes in Zimbabwe. Semi-structured questionnaires were administered using face-to-face interviews with participants. Data from focus group discussions and key informant interviews were used for validating data from questionnaire interviews. Mann-Whitney <jats:italic>U</jats:italic> test was employed to assess perception on the prevalence of pests between male and female farmers. Findings from this study depict that the females perceived a higher prevalence of bollworms (<jats:italic>Helicoverpa armigera</jats:italic>) (<jats:italic>P</jats:italic> ≤ 0.01), fall armyworms (<jats:italic>Spodoptera frugiperda</jats:italic>) (<jats:italic>P</jats:italic> ≤ 0.01), red spider mites (<jats:italic>Tetranychus urticae</jats:italic>) (<jats:italic>P</jats:italic> ≤ 0.01), and maize grain weevils (<jats:italic>Sitophilus zeamais</jats:italic>) (<jats:italic>P</jats:italic> ≤ 0.01) than males, while males perceive a higher prevalence of termites (<jats:italic>Isoptera</jats:italic>) (<jats:italic>P</jats:italic> ≤ 0.01) and cutworms (<jats:italic>Noctuidae</jats:italic>) (<jats:italic>P</jats:italic> ≤ 0.01) than females. Both male and female farmers perceived a greater increase in prevalence of aphids (<jats:italic>Aphidoidea</jats:italic>). Here, we show that farmers’ perceptions of changes in pest prevalence and pest management strategies differ by gender. Gender perception on change in prevalence of pests can be a valuable resource for the sustainable development of smallholder irrigation farming system and scientific research.</jats:p>

<jats:title>Abstract</jats:title><jats:p>The challenges of soil degradation and low crop yield are being addressed in East Africa using a number of soil health-promoting farming systems including Conservation Agriculture (CA). CA is based on principles of minimal soil disturbance, continuous soil cover, and crop diversity, though implementation on farms may vary due to local circumstances. This study evaluated the effect of CA, as practiced by farmers, and compared farmer descriptions of soil health with scientific measures. CA and non-CA fields were compared in regions of Ethiopia (23 farms), Kenya (23 farms), and Tanzania (13 farms) with most fields repeatedly sampled for 2 to 3 years. CA and non-CA fields were located within meters, on soils with the same texture, growing similar crops. CA systems used precision planting, mostly with basins. Soil parameters were assessed using a participatory approach where farmers and field technicians collected data. CA practices improved qualitative soil characteristics as sensed by farmers (e.g., hoe-ability, crusting, smell, water infiltration), and this positive response was consistent across most fields. For qualitative data, the logarithm of the odds ratio estimates method was used to test the probability that CA would provide soil improvement. Fields under the CA treatment had a higher probability of rating better than non-CA fields. Quantitative measurements of pH and microbial respiration validated farmer assessments. CA-managed soils were weakly associated with darker colour, indicating higher soil organic matter. Sandy soils did not appear to improve with CA as dramatically as clay and loam soils, suggesting different CA strategies may be required. We discuss both benefits and drawbacks of this type of participatory, on-farm research. We conclude that farmer participation as citizen scientists will advance soil restoration in East Africa and increase the potential for farmer-to-farmer knowledge exchange of soil-improving practices.</jats:p>

<jats:title>Abstract</jats:title><jats:p>Carbon sequestration and storage in biomass is one of the most important measures to mitigate climate change. Mediterranean woody crops can sequestrate carbon in the biomass of their permanent structures for decades; however, very few studies have focused on an assessment of biomass and carbon sequestration in these types of crops. This study is the first to estimate above- and belowground biomass carbon stock in Mediterranean woody crops through a bottom-up approach in the NE Iberian Peninsula in 2013. Moreover, this is the first time that an assessment of the annual changes in carbon stock in the study area over a six-year period is presented. For this purpose, eight crop- and site-specific equations relating biomass or biometric variables to crop age were calculated. Most of the data were our own measurements, but unpublished data supplied from other authors as well as data from literature were also considered. Census of Agriculture data was used to scale results from individual data up to the municipality level at the regional scale. Results show that in woody cropland in NE Spain the total biomass carbon stock in 2013 was 5.48 Tg C, with an average value of 16.44 ± 0.18 Mg C ha<jats:sup>−1</jats:sup>. Between 2013 and 2019, although there was a 2.8% mean annual decrease in the area covered by woody crops, the carbon stock in the biomass of these crops increased annually by 3.8% due to the growth of the remaining woody cropland. This new estimation of carbon stocks may contribute to better understand carbon balances and serve as a baseline to global inventories. It may also serve to assess and manage carbon storage as an ecosystem service provided by Mediterranean woody cropland for mitigating climate change and, in combination with adaptive strategies, for supporting a productive and resilient agro-food system.</jats:p>

<jats:title>Abstract</jats:title><jats:p>Grape growers are often constrained by available time and labor to conduct trials that deliver informative results. Spatially distributed trial designs coupled with data collection using sensing technologies can introduce efficiencies and also account for the impact of land variability on trial results. Various spatial approaches have been proposed, yet how farmers perceive them is largely unknown. We collaborated with four wine businesses in Australia to explore how grape growers and viticultural consultants perceive a simplified spatial approach to experimentation involving one or more vineyard rows or “strips.” In each case, the simplified strip approach was applied alongside growers’ or consultants’ own methods to compare the perceived value of different methods. The Theory of Planned Behavior was used as an analytical framework to identify factors influencing participants’ intentions towards adopting the strip approach. Our findings show that growers and consultants perceived several advantages of the strip approach over their own methods. Key factors impeding uptake were resource constraints for collecting trial data and lack of skills and knowledge to use and analyze spatial data to position the trial and interpret results. These constraints highlight the need to support growers and consultants who see value in this approach by developing automated and affordable measurements for viticultural variables beyond yield, and by providing training on how to analyze and interpret spatial and response data. This study provides novel insights for private and public sectors on where to focus efforts to facilitate adoption of spatial approaches to On-Farm Experimentation by specific target audiences.</jats:p>

<jats:title>Abstract</jats:title><jats:p>European dairy production faces significant economic, environmental, and social sustainability challenges. Given the great diversity of dairy cattle production systems in Europe, region-specific concepts to improve environmental and socioeconomic sustainability are needed. Regionally integrated dairy cattle-crop systems emerge as a more resilient and sustainable alternative to highly specialized farming systems. Identifying different dairy cattle production typologies and their potential interactions with fodder crop production is presented as a step in transitioning to optimized agricultural systems. Currently existing typologies of integrated systems are often insufficient when characterizing structural, socioeconomic, and environmental components of farms. We fill this gap in the literature by identifying, describing, and comparing representative dairy cattle production system typologies and their interrelation with regional fodder crop production at the European regional scale. This is a necessary step to assess the scope for adapted mitigation and sustainability measures in the future. For this purpose, a multivariate statistical approach is applied. We show how different land-use practices, farm structure characteristics, socio-economic attributes, and emission intensities condition dairy production. Furthermore, the diversity of regional fodder crop production systems is demonstrated by analyzing their distribution in Europe. Together with identified typologies, varying degrees of regional specialization in milk production allow for identifying future strategies associated with the application of integrated systems in key European dairy regions. This study contributes to a better understanding of the existing milk production diversity in Europe and their relationship with regional fodder crop production. In addition, we discuss the benefits of integrated systems as a clear, viable, and resilient alternative to ongoing livestock intensification in the European context. Identifying interactions between components of integrated systems will facilitate decision-making, the design and implementation of measures to mitigate climate change, and the promotion of positive socio-economic and environmental interactions.</jats:p>