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This post is part of the Science Tuesday feature series on the USDA blog. Check back each week as we showcase stories and news from the USDA’s rich science and research portfolio.

USDA’s annual survey on food security among American households showed, not unexpectedly, that the prevalence of food insecurity increased during the 2007-09 recession. In the post-recession period, the highest monthly unemployment rate dropped from 10 percent in 2009-10 to 8.3 percent in 2012. But the rosier employment picture was matched by very little improvement in the level of food insecurity – i.e., households’ lack of consistent access to adequate food for active, healthy lives. The national prevalence of food security was 14.5 percent in 2012, essentially the same as in 2009 and 2010. What could be the explanation?

Smokey Bear, the iconic symbol of wildfire prevention for 70 years, is for many people a comforting symbol of a promise that everything will be okay. As long as we all work together, as one of Smokey’s young pen pals wrote recently.

“Dear Smokey: I would like to be a Junior Forest Ranger and help the big rangers. I promise to look after the forest and watch out for baddies making fires and damaging trees. Love Adam”

The letters come one-by-one or in neatly piled stacks, with carefully drawn portraits and hastily scrawled letters. They want to know if Smokey Bear is okay. They ask if he can write to them. They show compassion, knowing Smokey’s mother did not make it out of the fire.

Ever wonder how USDA is able to make a forecast – either economic or weather?  It takes a lot of work.

Last week, USDA’s U.S. meteorologist Brad Rippey met with producers in southwestern Michigan. The first stop, on a rainy, stormy morning, was with Bryan Bixby, owner of Bixby Orchards in Berrien Springs.  Bixby described how spring wetness has been detrimental to fieldwork and crop quality.  For example, wet, humid conditions shortened the southwestern Michigan strawberry season and reduced fruit quality.  In addition, wetness has impeded Bixby's efforts to complete soybean planting.  During a tour of his orchards, Bixby described how the recent winter was Michigan's harshest since 1976-77, causing substantial mortality in peach trees -- requiring him to buy peaches from South Carolina in order to meet customer demand.

Happy Birthday America! It’s the Fourth of July and time to celebrate American life. What do you have planned? A family reunion at the beach? A backyard barbeque with family and friends? A picnic in the park? Or a few friends on your patio? Here are some quick and easy tips to make your family’s Fourth of July meals and snacks healthy and delicious!

Get creative and let MyPlate be your guide.

Agnes Mukagasana, an eager, next-generation youth involved in conservation, paused for a moment to adjust her hat in the afternoon Colorado sun and assess her well-honed tree-planting technique.

She learned her skills as an employee of Groundwork Denver, an organization dedicated to the sustained improvement of the physical environment through community-based partnerships including federal land management agencies such as the U.S. Forest Service.

Mukagasana and other area youth recently took part in a ceremony where the U.S. Departments of Agriculture and Interior joined representatives of the National Fish and Wildlife Foundation and several other partners at the Rocky Mountain Arsenal National Wildlife Refuge. The ceremony announced $6.7 million in joint USDA, Department of Interior and National Fish and Wildlife Foundation grants to support conservation employment and mentoring opportunities for youth on public lands around the country as part of the President’s 21^st Century Conservation Service Corps (21CSC) Initiative.

Spring is often associated with ramps, rain, flowers and frogs, but on the Monongahela National Forest, the season of rebirth is focused on protecting our woods from garlic mustard.

Garlic mustard is a non-native invasive plant first brought to America by European settlers in the 1800s. They enjoyed eating it because of its zesty garlic-like flavor. They just had no idea that this plant would become one of the biggest threats to the diversity of plants and animals found in our eastern forests.

In an effort to fight the spread of this invasive species, the Monongahela, along with several partners, hosts an annual Garlic Mustard Challenge to increase public awareness about the threat of non-native invasive species and to achieve boots-on-the-ground results.  Last year, elementary school students in Grant County, West Virginia, removed more than 13,000 pounds of garlic mustard from the Monongahela.

The New Jersey Invasive Species Strike Team is working to prevent the spread of emerging invasive species across New Jersey, and they’ve created a smartphone app to help.

Using part of a 2013 Conservation Innovation Grant from USDA’s Natural Resources Conservation Service, the team has released an app that can help you identify and report sightings of new invasive species.

The new app, called New Jersey Invasives, can help farmers, forest landowners and outdoor enthusiasts quickly identify newly discovered and localized invasive species and get information on how to combat them before they become a larger and more costly problem.

It started as an informal gathering of interested extension agents, agronomists, farmers and staff of USDA’s Natural Resources Conservation Service, who came to Gainesville, Fla. to attend an Internet-based conference sponsored as part of this year’s soil health campaign.

But much of the information was based on Midwestern experience.  Everyone knows Florida is different, with sandy soils and a longer growing season.

So perhaps it wasn’t surprising when the Gainesville group suggested taking the discussions further.  In a flurry of emails, the follow-up meeting evolved into a small tour of cover crop practitioner Kirk Brock’s farm, and then grew to include neighboring Fulford Farms.

Two million seedlings will grow up one day to become the forests of our future.

The vision for all of those trees is part of the mission of the Charles E. Bessey Nursery, part of the Nebraska National Forests and Grasslands, and the oldest federal seedling nursery in the nation.

Working with the Bessey Ranger District and the volunteer group Friends of the Nebraska National Forests, the nursery recently invited the public in for a rare opportunity to see the nursery in full production; growing, packing and shipping hundreds of thousands of seedlings to U.S. Forest Service, Bureau of Land Management, conservation districts and other government agency locations. The seedlings are used for reforestation following fire and insect infestations, wildlife/habitat plantings, wind breaks, conservation plantings, and general planting.

Recently, I visited the Habitat for Humanity homes on Cape Cod, Massachusetts in celebration of National Homeownership Month, a time to recognize the important role that housing plays in the economy. The construction of these homes was made possible through loans from USDA Rural Development (RD).

The partnership between USDA Rural Development and the Cape Cod Chapter of Habitat for Humanity continues to help provide numerous low-income families with safe, affordable, and well-built homes. USDA Rural Development and the Cape Cod Chapter of Habitat for Humanity first partnered in 2011. In FY 2013, USDA Rural Development financed four out of five of the Habitat homes built on Cape Cod, and they are currently on track to finance eight more Habitat homes being built on Cape Cod in FY 2014.