Category: Water management
Different levels of water and fertilizer application in 'Hass' avocado trees during four seasons in the Peumo Valley of Chile
A research study was carried out during four seasons between December 2003 to May 2007, in five years old ‘Hass’ avocado trees (Persea americana Mill.) in the Peumo Valley, Chile. Its objective was to analyze the effects of two doses of fertilizer and four differential levels of water application (25, 50, 75 and 100% of the theoretical water volume required by the plant) on the production and quality of the fruit. A split-plot experimental design with allocation in completely randomized blocks
The effect of soil type, fruit load and shaded area on ‘Hass’ avocado (Persea americana Mill.) water use and crop coefficients
‘Hass’ avocado tree water use was quantified within orchards located in the three main avocado growing regions of New Zealand, from 2016 to 2019. The three regions, the Bay of Plenty, the Whangarei District and the Aupouri Peninsula in the Far North District, differ in climate and soil type (allophanic, clay, and sandy soils, respectively). At each site, local meteorological conditions were monitored, avocado tree water use was quantified using heat-pulse sap flow measurement, total leaf area
Water savings, nutrient leaching, and fruit yield in a young avocado orchard as affected by irrigation and nutrient management'
This project was designed to determine the effect of fertilizer rate and irrigation scheduling on water use, nutrient leaching, and fruit yield of young avocado trees (Persea americana Mill. cv. Simmonds). Seven nutrient and irrigation management practices were evaluated: (1) irrigation based on crop evapotranspiration (ET) with 50% fertilizer at a standard rate (FSR); (2) ET irrigation with FSR (typical for avocado production in the area); (3) ET irrigation with 200% FSR; (4) irrigation based on
Water management and salinity adaptation approaches of Avocado trees: A review for hot-summer Mediterranean climate
The production and consumption of avocado has increased significantly over the past years, experiencing a steady expansion into new markets around the world. This review paper focuses on avocado cultivation in its new markets with hot-summer Mediterranean climate. A significant literature gap exists on the viability of this crop in such data environments which experience limited availability of water in the summer exacerbated by climate change and potential salinity issues in irrigation water, typical
Rootstock-Dependent Response of Hass Avocado to Salt Stress
Salt stress is a major limiting factor in avocado (Persea americana) cultivation, exacerbated by global trends towards scarcity of high-quality water for irrigation. Israeli avocado orchards have been irrigated with relatively high-salinity recycled municipal wastewater for over three decades, over which time rootstocks were selected for salt-tolerance. This study's objective was to evaluate the physiological salt response of avocado as a function of the rootstock. We irrigated fruit-bearing 'Hass'
Multilevel business power in environmental politics: the avocado boom and water scarcity in Chile
The production and export of avocados in Chile have experienced explosive growth since the 1990s, severely threatening local communities' human right to water. Despite contentious activities and protest, there has been scant reaction from public authorities and policy continues to strongly support avocado exports. We explain this by analyzing the role that business plays in water politics and the different means it has to counter the search for political influence by aggrieved communities. We argue