Dave Smart, Daniel L. Schellenberg, Christine M. Stockert, Maria Mar Alsina Nitrogen emissions are an important environmental concern by both State and Federal regulatory agencies. Nitrous oxide as a greenhouse gas has a greater potential to warm the atmosphere than CO2.
Ted Sammis, V. Gutschick, and Juming Wang A modeling approach to understanding the physiological response of a nut tree to inputs of water, nutrients, salinity, cultivation, and pruning offers the only way to understand the complex interaction of these management decisions on nut production.
Sanjit K Deb, John G Mexal, Parmodh Sharma Fig. 1. Pecan trees at Site I in Riverside Co.The limited availability of water is a growing concern and focuses research goals on the need for water conservation and efficient water use.
Sampling For the variability assessment trials, leaf samples are taken five times during the season from within the canopy of each of 1054 replicate trees from 4 locations (Arbuckle, Salida, Madera, Belridge).
Layout of sampling replicates in experimental almond orchard in Kern Co. A four-year fertigation trial of nitrogen and potassium treatments is underway in almond at a Kern Co. site. The trial was replicated under two irrigation systems, FanJet microsprinklers and Drip.
Gary L. Obenauf Director of Research California Dried Plum Board 3840 Rosin Court, Suite 170 Sacramento, CA 95834 gobenauf@agresearch.nu Nancy Ireland Research Chair National Grape and Wine Initiative 502 E.
United States Department of Agriculture Specialty Crop Research Initiative Almond Board of California The Mosaic Company Tessenderlo Kerley YARA North America, Inc.
Leonardo Lombardini & Astrid Volder Fig. 1. Preparing new study orchard.This component of the project involves developing an understanding of the timing of root activity, and characterizing nitrogen and water movement through the soil profile.
David Slaughter, Yun (Carolyn) Zhang The standards for leaf tissue analysis and nitrogen management in fruit and nut trees were established in the 1950's and 1960's and have been only modestly refined over the subsequent years.
Fig. 2. Reflecteance versus wavelenth Leaf reflectance was measured in the field for pairwise comparison to stem water potential, and chlorophyll content (Fig. 2). The spectrometer optical cable was held level for pairwise reflectance above and below canopy for these transmittance measurements.
