The U.S. Department of Agriculture is set to release the 2012 Census of Agriculture on Friday with more specific data by state and county and by agriculture product.

The National Agricultural Statistics Service released a partial report in February.

The full 2012 Census of Agriculture will also include more details about all of the individuals who own and work on farms. The preliminary report only profiled individuals listed as “principal operators.”

Following a 2002 Census change, farm operations now can report up to three operators.

According to the partial 2012 Census data released in February, California topped the list of states in terms of total value of agricultural products sold. Iowa, Texas, Nebraska, Minnesota, Kansas, Illinois, North Carolina, Wisconsin and Indiana were next in terms of total value of agricultural products sold.

Graphic provided by the USDA

Among that list, Nebraska and Texas were the only two states that reported an increase in total number of farms.

The other eight aforementioned states reported decreases in total number of farms.

Besides the general decrease in farm operations, the partial 2012 Census suggested that several other factors could dramatically affect agricultural production throughout the country.

Friday’s full report will provide a benchmark to evaluate the impact of recent agricultural initiatives and policies.

Here is a look at what to watch for in the full release.

Hen housing and egg prices

Currently, lawmakers from the top two agricultural sales states – California and Iowa – are debating production standards for egg-producing hens.

Graphic provided by the USDA

Legislators in Iowa and other major egg-producing states are challenging California’s Proposition Two, a piece of legislation that sets housing standards for egg-producing hens for any company selling eggs in the state.

California legislators passed Proposition Two in 2008.

The new standards will go into effect at the beginning of next year.

Based on 2007 Census of Agriculture data, the poultry and egg industry was the sixth-largest industry in California. It was the fourth-largest industry in Iowa.

Both states are top U.S. shell-egg producing states.

2014 Farm Bill and the elimination of direct payments

The new Farm Bill passed earlier this year cut direct payments to producers.

Photo provided by the USDA

These payments were linked to commodities such as corn, wheat, soybeans and oilseeds. As the payments are phased out, some producers that have historically depended on the government subsidies could become economically burdened.

Grains, oilseeds, dry beans and dry peas were the top agricultural products in Iowa and Illinois, according to the 2007 Census of Agriculture. They earned producers in those two states a combined $23.4 billion in sales.

Data show that Illinois and Iowa’s second-leading agricultural products, hogs and pigs, brought in a combined total of just $5.9 billion.

California was the only top agriculture-producing state that did not rely heavily on grains, oilseeds, dry beans and dry peas, according to the 2007 Census.

Porcine Epidemic Diarrhea Virus

The Porcine Epidemic Diarrhea Virus (PEDv) is a lethal disease that food-safety inspectors detected in the U.S. pork supply starting in May of last year. Since the disease’s detection, it has spread throughout 29 states.

Officials estimated that the disease has killed as many as 7 million pigs, according to the Pork Checkoff program.

As the disease continues to kill piglets and continues to reduce the number of hogs going to market, the pork industry may suffer.

Read more on the disease here: "New virus threatens U.S. pork supply"

Hogs and pigs were listed as a top product in seven of the top-ten agricultural producing states.

The 2012 Census of Agriculture will provide a snapshot of the hog and pig sector from before the PEDv. It will then help the U.S. Department of Agriculture and others in the industry to assess the true damage the disease is causing.

Iowa could be the state with the most on the line.

Grains and oilseeds, hogs and pigs, and poultry and eggs are three of its top products.

California’s agricultural economy was driven by $11 billion in revenue from fruits, tree nuts and berries, along with $6.5 billion from the milk and dairy industry. Direct payments and PEDv will likely have little effect on the state.

However, the ongoing drought in the state and region could drastically impair outputs.