Division of Agriculture and Natural Resources
Division of Agriculture and Natural Resources
Division of Agriculture and Natural Resources
University of California
Division of Agriculture and Natural Resources

Drought

Earthworms, Soil Productivity, Citrus and Avocado

earthworm

There are 4,000 species of earthworms grouped into five families and distributed all over the world. Some grow uo to 3 feet long, while others are only a few tenths of inches. We call them nightcrawlers, field worms, manure worms, red worms and some...

Shoot and Twig Dieback of Citrus

branch dieback on clementine

Recently, an outbreak of shoot and twig dieback disease of citrus has been occurring in the main citrus growing regions of the Central Valley of California (Fig 1). The causal agents of this disease were identified as species of Colletotrichum, which are...

Posted on Wednesday, April 19, 2017 at 5:19 AM
  • Author: Joey Mayorquin, Mohamed Nouri, Florent Trouillas, Greg Douhan and Akif Eskalen

Extreme Precipitation and Water Storage in California

Reposted from the California Institute for Water Resources Blog    California's recent drought was the worst in memory. However, in a relatively quick turnaround, this year the state's water infrastructure is full and water managers are...

Posted on Monday, April 17, 2017 at 9:01 PM
  • Author: Mohammed Safeeq

Drones are used for research and land management; do you want to learn how to use drones?

A drone collecting data from a drought stressed sorghum nursery.

Jeffery Dahlberg, director of UC ANR Kearney Agricultural Research & Extension Center (KARE), specializing in plant breeding and genetics, is working with drones to collect data for one of his sorghum programs. Work will continue the development of...

Posted on Thursday, March 23, 2017 at 4:36 PM

How much drought can a forest take?

Aerial Tree Mortality Surveys Show Patterns of Tree Death During Extreme Drought Dead trees in the Sierra National Forest in April 2016. Credit: USFS Region 5   Quick Summary Trees in the driest, densest...

Posted on Friday, January 20, 2017 at 12:19 PM
  • Author: Kat Kerlin

Research Spotlight: Foothills irrigation creates wetlands and sustains them in drought, benefitting birds

An unintentional wetland created by irrigation runoff at SFREC (left) and an intentionally created irrigated wetland on Spenceville SWA (right).

After five years, the northern Sierra Nevadas have finally been moved out of the “severe drought” category by the US Drought monitor following a promisingly rainy start to the 2017 water year. This is not only good news for our agricultural...

Posted on Tuesday, January 10, 2017 at 10:42 AM
  • Author: Nathan Van Schmidt

Rain and snow bring hope to California farmers

Research land under a stormy sky at the UC Kearney Agricultural Research and Extension Center Jan. 5, 2017.

California's years-long drought is easing up, with storms delivering rain and snow that has exceeded "normal" for the state, reported Jed Kim for the Marketplace Sustainability Desk. Kim interviewed Dan Sumner, the director of the UC Agricultural Issues...

Posted on Thursday, January 5, 2017 at 9:43 AM

California may be emerging from the grip of drought

A stormy vineyard captured by California Winegrape Growers on Twitter, @CAWG_GROWERS.

The California rainy season is off to a good start, raising hopes that the ongoing drought will be snapped, reported Aaron Davis in the East Bay Times. "We've seen a sigh of relief from a lot of growers that are right at about half of their total...

Posted on Wednesday, December 21, 2016 at 11:34 AM

Watch Out for Those Rodents - They are After Your Trees

avocado rodent damage 2

redcThe hills have been dry for a long time, and the long dry fall is bringing animals into the avocado groves that normally stay out in the hills. They want the green cambium of trees and the moisture it provides. And especially rodents will have a...

Posted on Friday, December 2, 2016 at 3:58 PM

Researcher Spotlight: Managing Rangelands for the Bad Times as Well as the Good

Figure 2. Total cover and biomass responses to rainfall and grazing legacy over three years (± SE). Dark squares indicate a legacy of moderate grazing – which created a diverse mix of grass and forb species - and light circles indicate a legacy of low grazing – which shifted the community to only dominant grasses.

Over the last few years Californians have grappled with how to manage lands during times of both drought and plentiful rainfall. At SFREC and on Central Valley rangelands, one question is whether management that promotes high forage in wet years alters...

Posted on Tuesday, November 8, 2016 at 8:23 AM
  • Author: Lauren Hallett
  • Author: Katharine Suding
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