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Salinity

2016 Research

In this research, we have modeled the relationships between leaf nutrient concentrations and the yields of avocado trees with the aim of developing decision support tools for improved fertilization and nutrient management to increase avocado fruit yields.

2013 Research

Avocado yields are decreased by chloride toxicity and soil salinity throughout California avocado orchards but there is little information on the extent to which different rootstocks can be used to improve tree performance under saline conditions. This research is aimed at the development of a production function model that can be used to predict the impacts of irrigation water chloride content and salinity (EC) on avocado yields.

2011 Research

Avocado yields are decreased by chloride toxicity and soil salinity throughout California orchards but there is little information on the extent to which different rootstocks can be used to improve tree performance under saline conditions. This research has been aimed at the development of a production function model that can be used to predict the impacts of irrigation water chloride content and salinity (EC) on avocado yields.

2008 Research

Avocado is one of the most salinity sensitive horticultural crops, but is commonly grown in areas having saline irrigation water (an EC greater than 0.75 dS/m and chloride >100 ppm). Resulting problems associated with high soil salinity and chloride toxicity include reductions in fruit yield and tree size, lowered leaf chlorophyll content, decreased photosynthesis, poor root growth, and leaf scorching (Mickelbart et al., 2007).

2006 Research

This project will provide avocado growers with information on which rootstocks are most useful for production of avocado on saline soils. Identification of rootstocks that can be incorporated into the breeding program will eventually allow growers to use irrigation water having a higher salinity content that is currently used for avocado production. As water costs increase and growers rely increasingly on saline water for irrigation, this will permit use of higher salinity water with lesser damage to the trees and concomitant reductions in crop yield.

2004 Research

This project is aimed at evaluation and recommendation of rootstocks that are useful for production of avocado on saline soils. Rootstocks identified as salinity tolerant and that also meet criteria with respect to productivity and Phytophthora resistance from other related projects will be recommended for commercial release. Rootstocks with high salinity tolerance are also being incorporated into the breeding program.

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