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The Lower Rio Grande Valley in southern New Mexico is one of the major pecan producers in the nation. Pecan is known to consume large amounts of water.
Daniel Schellengerg, Ph.D. student, at the orchard sampling site in Kern County. To compare N2O emissions from two different forms of nitrogen (N) fertilizer: urea ammonium nitrate and calcium ammonium nitrate.
Fig. 1. A schematic with soil layers and soil texture for the drip and fanjet sites.The analysis of soil texture for both the fanjet and drip sites showed that the soil profile of the studied almond orchard is highly heterogeneous and layered.
We developed a relatively simple installation device that minimized soil disturbance, especially suited for sensor installations at depths larger than about 70 cm (Fig. 1).
The spatial and temporal variation of soil water content in the root zone for the drip site is shown in Figure 2. The black and red arrows indicate the irrigation and rain events during the presented time period, respectively.
Members of the research teams are presenting their finding at regional, national and international conferences, professional meetings and grower group meetings. Below is a partial listing of these outreach activities in 2011 and 2012. Presentation may be downloaded (PDF) where indicated.
Members of the research teams are presenting their finding at regional, national and international conferences, professional meetings and grower group meetings. Below is a partial listing of these outreach activities in 2009 and 2010. Presentation may be downloaded (PDF format) where indicated.
Nitrogen (N) is important for developing healthy, productive pecan (Carya illinoinensis K. Koch) trees. However, current applications of fertilizer generally follow a standard practice, without consideration of spatial, temporal and climatic variability.
The overall goal of this research project is to develop an integrated nutrient management practices for pistachio trees across different ranges of environments in California. The specific objectives of our work with long term and large scale pistachio project are discussed below.
