(DTN) -- Producers across the country made substantial progress in planting corn last week, including in states such as North Dakota and Indiana. But with more rain forecast for northern parts of the Corn Belt, concerns remain about the 21% of the crop that has yet to be planted.

The nation's corn crop was 79% planted as of Sunday, May 22, compared to 63% last week and an 87% five-year average, according to USDA's weekly Crop Progress report. Analysts were expecting about 80% of the crop to be planted. The crop is 45% emerged, compared to 21% last week and a five-year average of 59%.

"Notable states that moved to 90% planted or better were Illinois (90%), Iowa (98%), Kansas (93%) and Nebraska (94%)," said DTN Analyst John Sanow. "North Dakota made an unexpected jump of 35 percentage points, while Indiana increased by 20 percentage points over the past week. However, those two areas continue to trail the five-year average by 28 percentage points and 27 percentage points respectively, while Ohio only sits at 11% done, or 69 percentage points behind the average pace."

With another round of precipitation forecast this week for northern tier states that are already battling saturated soils, traders may decide to focus on the amount of acres that may not be seeded, making this week's report bullish for corn, Sanow said.

Meanwhile, soybeans are 41% planted, compared to 22% last week and 51% average, and on par with analysts' projections.

"This report should be considered neutral to bullish, though traders may continue to focus on the possibility beans will gain acreage from corn, not to mention there remains time to get the seed in the ground," Sanow said.

Winter wheat is 62% headed, compared to 54% last week and 65% on average. Winter wheat conditions deteriorated for a seventh week in a row with 45% of the crop now rated very poor to poor, 23% fair and 32% good to excellent.

"Monday's weekly crop condition numbers led to the DTN Winter Wheat Crop Condition Index of 24 points, below last week's 27 points and well below last year's 160 points," Sanow said. "Traders were expecting a slight improvement this week, but to no avail, as dry conditions continue to plague the southwest Plains. This report should be considered bullish."

Spring wheat planting at 54% is still well behind the average pace of 89%. Twenty-four percent of the crop is emerged, compared to 67% last year and 64% on average.

"These numbers should be viewed as bullish, particularly when this week's forecast is for cool, wet conditions increasing the likelihood acreage will be lost," Sanow said.

The following are highlights from weekly crop progress reports issued Monday by National Ag Statistics Service offices in individual states. To view the full reports from each state, visit bit.ly/…

Colorado

Most of Colorado received some precipitation last week, especially along the I-70 corridor. The southern regions and southeastern corner reported very limited precipitation. The state also experienced below average temperatures and reported 4.4 days suitable for fieldwork. Topsoil moisture was rated 22% very short, 15% short, 59% adequate and 4% surplus. Subsoil moisture was rated 25% very short, 22% short, 52% adequate and 1% surplus. Winter wheat was 85 percent jointed with 24 percent headed at the end of last week. The crop is rated in mostly fair condition. Spring wheat was 90 percent seeded with 59 percent emerged and rated in mostly fair condition. Corn plantings progressed last week to 86 percent planted with 20 percent emerged.

Illinois

Temperatures and rainfall were both below normal last week, with 5 days suitable for fieldwork. The number of days suitable for fieldwork averaged 5 days statewide. Topsoil moisture continued to decrease and was assessed at 29 percent surplus, 69 percent adequate and 2 percent short. Corn progressed rapidly to 90 percent planted and 56 percent emerged, up from the previous week of 69 percent and 24 percent, respectively. The five-year average for this time period is 85 percent planted and 66 percent emerged. Soybeans came in at 47 percent planted with emergence at 12 percent. The five-year averages are 43 percent and 17 percent, respectively.

Indiana

Planting progressed rapidly in northern and eastern counties while continuing rain and flooded river bottoms caused further delays in some eastern and southern counties. There were 3 days suitable for field work. Statewide, topsoil moisture was rated 1% short, 52% adequate and 47% surplus. Subsoil moisture was rated 1% short, 54% adequate and 45% surplus. Forty-nine percent of the intended corn acreage has been planted compared with 88 percent last year and 76 percent for the 5-year average. Twenty percent of the corn acreage has emerged compared with 78 percent last year and 54 percent for the 5-year average. Seventeen percent of the intended soybean acreage has been planted compared with 49 percent last year and 43 percent for the 5-year average. Three percent of the soybean acreage has emerged compared with 32 percent last year and 18 percent for the 5-year average.

Iowa

Corn and soybean planting progress managed to meet or surpass the quick pace of 2010 with an average of 4.2 days suitable for fieldwork. Topsoil moisture levels rated 0 percent very short, 1 percent short, 79 percent adequate, and 20 percent surplus. Subsoil moisture rated 0 percent very short, 1 percent short, 81 percent adequate, and 18 percent surplus. Ninety-eight percent of Iowa's corn acreage has been planted, equal to last year but ahead of the five-year average of 94 percent. Seventy-four percent of the State's corn crop has emerged, behind last year's 81 percent, but ahead of the average 67 percent. Soybean planting is 78 percent complete, ahead of last year's 72 percent and the normal pace of 68 percent. Twenty-one percent of the State's soybean crop has emerged, behind last year's 25 percent but slightly ahead of the five-year average of 19 percent.

Kansas

Most areas of Kansas received below average temperatures and some rain last week, although totals varied from more than 5 inches in Concordia and less than half an inch in the southwest. Farmers had an average of 4.5 days suitable for field work. Topsoil moisture supplies improved in all but the West Central and Southwest Districts and were rated at 23 percent very short, 22 percent short, 45 percent adequate, and 10 percent surplus. Topsoil in the Southwest District was 100 percent short to very short, followed by the West Central at 85 percent and the South Central at 81 percent short to very short. Topsoil moisture in the North Central District was 92 percent adequate to surplus, a 45 percent improvement from a week earlier. Winter wheat condition continues to be poor but did not worsen at 25 percent very poor, 30 percent poor, 30 percent fair, 14 percent good, and 1 percent excellent. Eighty-five percent of the crop has headed, advancing 21 points from the previous week. Five percent of the wheat has turned color, mostly in South Central Kansas, compared to 3 percent in 2010 and 6 percent for the 5-year average. Corn planting reached 93 percent complete by Sunday, barely ahead of both last year at 91 percent and the 5-year average of 92 percent. Sixty-two percent of the crop has emerged, ahead the previous year at 60 percent but behind the 5-year average of 63 percent. Soybean growers had planted 46 percent of their crop by Sunday, well ahead of both last year at 28 percent and the 5-year average of 34 percent. Thirteen percent of the crop has emerged.

Minnesota

Several consecutive days of warm, dry conditions this past week allowed producers to make significant planting progress. There were 4.7 days suitable for fieldwork. Topsoil moisture supplies were rated 1 percent short, 64 percent adequate, and 35 percent surplus. Spring wheat planted advanced 41 percentage points from the previous week to 80 percent planted, and corn advanced 34 points to 81 percent planted. Soybeans were 38 percent planted, compared to 76 percent last year and 68 percent for the five-year average.

Missouri

Missouri had not updated its state crop progress report as of this posting.

Nebraska

Significant rainfall and below average temperatures were again recorded across the state, leaving 3.1 days suitable for fieldwork. Statewide, topsoil moisture was rated 13% short, 79% adequate and 18% surplus. Subsoil moisture was 12% short, 82% adequate and 6% surplus. Corn planting advanced to 94 percent complete, near 95 last year and average. Corn emerged was 55 percent, near 56 last year but two days behind 61 average. Soybean planting was 68 percent complete, ahead of 60 last year and 64 average. Soybeans emerged was 20 percent ahead of last year's 14 and 18 average. Wheat jointed was 78 percent, ahead of last year's 75 but below 91 average. Wheat headed was 8 percent, ahead of last year's 5, but six days behind 23 average. Wheat conditions rated 1 percent very poor, 12 poor, 32 fair, 48 good, and 7 excellent.

North Dakota

Planting progressed until the return of rain over the weekend with 4.4 days suitable for fieldwork. Topsoil moisture supplies were rated 1 percent short, 48 adequate, and 51 surplus while subsoil moisture supplies were rated 1 percent short, 50 percent adequate and 49 surplus. Spring wheat was 34 planted, and 9 percent emerged. Corn was 49 percent planted, an increase of 35 percentage points from last week and reached 7 percent emerged. Soybeans were 12 percent planted, behind both last year and the average. More than half of the state's sugarbeet crop was planted last week, as 80 percent has now been planted compared to 27 percent a week ago. Sugarbeets were 3 percent emerged.

Ohio

The average temperature for the State was 58.6 degrees, 3.9 degrees below normal. Precipitation averaged 0.99 inches, 0.19 inches above normal. There were 70 modified growing degree days, 27 days below normal. Reporters rated 0.6 days suitable for fieldwork and topsoil moisture was rated 14 percent adequate, and 86 percent surplus. As of Sunday May 22, corn was 11 percent planted, which was 76 percent behind last year and 69 percent behind the five-year average. Corn emerged was 2 percent, compared to 72 percent last year and 58 percent for the five-year average. Four percent of soybeans were planted, which was 44 percent behind last year and 50 percent behind the five-year average. One percent of soybeans were emerged, compared to 30 percent last year and 26 percent for the five-year average.

Oklahoma

Oklahoma had not updated its crop progress report as of this posting.

South Dakota

Spring planting progress is slowly increasing with 3.7 days suitable for field work in the past seven days. Corn planting advanced 27 percentage points planted last week to 44% complete. Planting progress is still behind last year and the five-year average at 55%. Soybean planting is beginning with 5% now planted, but is still behind last year's 8% and 13% for the five-year average. Spring wheat planting is estimated at 84% for the state, compared to 91% last year and 93% for the five-year average. Thirty-six percent of the crop has emerged. Cooler temperatures again slowed progress of winter wheat growth with only 19% now in the boot stage, compared to last year's 27%.

Texas

Areas of the Cross Timbers, the Blacklands, and East Texas received up to 6 inches of rainfall, areas of the Edwards Plateau, South Texas, and the Lower Valley received up to 2 inches of rainfall, while the rest of the state observed scattered showers. As of Sunday, 97% of the corn crop had been planted, slightly ahead of last year's 96% but even with the five-year average. Eighty four percent of the crop had emerged and 34% is silked, ahead of the 17 percent five year average. The corn crop was rated 36% very poor to poor, 8% fair, 25% good and 1% excellent condition. Winter wheat was 97% headed and 14% harvested, ahead of the five-year average of 4%. Crop conditions were rated 76% very poor to poor, 15% fair and 9% good. Soybeans are 94% planted and 92% emerged, ahead of last year's 90% and 81% respectively.

Wisconsin

The dry weather this past week provided an excellent opportunity for farmers to get into the fields with 5.4 days suitable for fieldwork statewide. Soil moisture was rated 5% short, 77% adequate and 18% surplus. Corn planting jumped to 63 percent complete statewide, compared to 87 percent last year, and the five-year average of 81 percent. Corn emerged was at 14 percent, compared to 48 percent last year. Soybean planting is well underway with farmers not wasting any time. Statewide soybean planting was at 25 percent complete, compared to 52 percent last year.