2021 Mexico

Cognitive Maps Across Multiple Social Sectors: Shared and Unique Perceptions on the Quality of Agricultural Soils in Mexico

Authors: Arroyo-Lambaer, D.; Uscanga, A.; Pina Tejeda, V.; Vazquez-Barrios, V.; Reverchon, F.; Rosell, J.; Escalante, A.; Pena-Ramirez, V.; Benitez, M.; Wegier, A.

Incorporating the views and perceptions of local farmers and other actors with stakes in agricultural production is critical for better-informed decision making and tackling pressing issues, such as soil degradation. We conducted a study that sought to integrate and analyze perceptions regarding the quality and degradation of agricultural soils across different social sectors in Mexico, including producers of two annual crops (maize and beans) and two perennial crops (coffee and avocado), members

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2013 Chile

Soil erosion, runoff and nutrient losses in an avocado (Persea americana Mill) hillside orchard under different groundcover management systems

Authors: Atucha, A.; Merwin, i.; Brown, M.; Gardiazabal, F.; Mena, F.; Adriazola, C.; Lehmann, J.

Assess the influence of different groundcover management systems on erosion and runoff processes associated with extremely steep hillside avocado (Persea americana Mill) orchards, in a Mediterranean climate with high rainfall variability. We compared several groundcover management systems at a steep hillside avocado planting in a three-year study: 1) Bare soil (BS), pre- and post-emergence herbicides; 2) Vegetation strip (VS), post-emergence herbicide applied in a 1-m wide strip on the tree row plus

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2011 Chile

Improving Soil Oxygenation with Hydrogen Peroxide Injection into Heavy Clay Loam Soil: Effect on Plant Water Status, CO2 Assimilation and Biomass of Avocado Trees

Authors: Gil, P.M.; Ferreyra, R.; Barrera, C.; Zuniga, C.; Gurovich, L.A.

Commercial avocado production in Chile has expanded to areas with poorly drained soils presenting low oxygenation over significant periods of time throughout the year. In many of these areas, irrigation management is difficult because plantations are often placed on slopes of hills. Poorly aerated soils combined with irrigation design and management problems can limit avocado fruit production and quality, particularly if hypoxia stress occurs between spring and the beginning of summer. It is well

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2012 Chile

Effect of soil water-to-air ratio on biomass and mineral nutrition of avocado trees

Authors: Gil, P.M.; Bonomelli, C.; Schaffer, B.; Ferreyra, R.; Gentina, G.

In Chile, expansion of avocado production has resulted in many orchards established in marginal soils that are poorly drained and have high soil water-to-air ratios when soil moisture is at field capacity. However, avocado trees are sensitive to poor soil aeration. A study was conducted to determine the effects of different soil water-to-air ratios (W/A) on biomass and nutrient content of avocado trees. Two-year-old avocado trees were grown for 2 seasons in containers in soils, with different W/A,

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2014 Chile

Effect of soil available water depletion on plant water status, fruit size and yield of avocado trees cv. 'HASS'

Authors: Ferreyra, R.; Selles, G.; Gil, P.; Celedon, J.; Maldonado, P.

The objective of this study was to define the soil available water depletion (SAWD) in avocado, in order to use it as a criterion for irrigation programs in soils of fine texture and low aeration capacity. to determine appropriately the fraction of soil SAWD we performed three independent trials: Trial 1: We evaluated two treatments: T1, irrigation to 100% ETc and then without irrigation for 13 days, until the SAWD reached 60%, and T2: daily irrigation replacing 100% of the evapotranspiration of

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2022 Colombia

Surface soil water content as an indicator of Hass avocado irrigation scheduling

Authors: Erazo-Mesa, E.; Gómez, E.H.; Sánchez, A.E.

This study aims to determine whether Hass avocado irrigation can be triggered based on the surface soil water content (SSWC). To address this question, the soil water dynamics from three Hass avocado orchard plots located in Valle del Cauca (Colombia) was simulated using a model provided by Hydrus-1D software, which was calibrated through the genetic algorithm NSGA-II and validated using the soil matric potential measured at several depths at nine monitoring stations installed in the three plots.

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