- (Focus Area) Agriculture
Satellite-based irrigation tools to manage irrigation water more precisely in avocado groves
Ali Montazar, UCCE Irrigation and Water Management Advisor
in San Diego, Riverside, and Imperial Counties
The water requirement of a crop must be satisfied to achieve optimum potential yields. The crop water requirement is called crop evapotranspiration and is usually represented as ETc. By combining reference evapotranspiration (ETo) and the proper crop coefficient (Kc), crop water use (ETc) can be determined as ETc = ETo × Kc. ETo is an estimation of evapotranspiration for short grass canopy under a well-managed, non-stressed condition. ETo is the main driver to estimate or forecast...
- Author: Ben A Faber
Microirrigation systems include microsprinklers for tree crops, drip emitters for trees, vines, and some row crops, and drip tape for row and field crops. Microirrigation systems apply water to the soil through emitters that are installed along drip lines and contain very small flow passages. Microirrigation systems can apply water and fertilizers more uniformly than other irrigation methods. This uniformity results in potentially higher yields, higher revenue, and reduced irrigation operating costs.
Uniformity, a performance characteristic of irrigation systems, is a measure of the evenness of the applied water throughout the irrigation system. Distribution uniformity (DU), sometimes called emission uniformity (EU), is an index...
- Author: Ben A Faber
Hot off the internet, a new edition of Topics in Subtropics, articles from UC subtropical horticulture folks
Topics in Subtropics Volume 25 Spring 2024
Jul 9, 2024
Fatemeh Khodadadi, Editor
Topics in this issue:
- Effectiveness of Asian citrus psyllid management in huanglongbing treatment zones in residential Southern California
- Managed honeybees in a wet year
- Threats to citrus orchards in California by synergistic effects of dry root rot and phytophthora root and...
- Author: Whitney Brim-DeForest
- Author: Luis Espino
- Author: Roberta Firoved
- Editor: Taiyu Guan
- View More...
At our last meeting, we had some questions about the approved uses of pendimethalin in California rice. There are several products labeled for use on rice with pendimethalin as the active ingredient. As of June 2024, pendimethalin registered products (on rice) include Prowl H2O, Prowl 3.3, Harbinger, Satellite Hydrocap, Stealth, Helena Pendimethalin, Pavilion H2O, Pavilion 3.3, and a few others. Please make sure to always check the product label, as not all pendimethalin products allow use for the below-listed timings. Furthermore, labels are updated regularly, so it should not be assumed that the same use pattern applies from season to season. For the most currently-registered products, refer to the California Department of Pesticide...
- Author: Ria DeBiase, UC Giannini Foundation
How policies affect emissions, land use, and the prices of fuel and vegetable oils
Over the last two decades, both the federal government and state governments have enacted policies to reduce greenhouse gas (GHG) emissions in the transportation sector. In a new Special Issue of ARE Update, University of California agricultural economists explore how these federal and state renewable fuel policies have affected biofuel production for motor and aviation fuels and consider how these policies have affected land use and food prices. Their research shows that as U.S. demand for...
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