The U.S. corn harvest advanced to 17% as of Sunday and soybean harvest went to 20%, but both were behind the five-year averages, USDA said on Monday.
Crop development has been delayed because of a cool summer, while rain this past week interrupted the Midwest harvest.
Year-ago numbers on all crops were not available because a lapse in federal funding then prompted the cancellation of 2013 crop progress reports for the weeks ending Oct. 6 and Oct. 13.
USDA's corn rating was unchanged from a week ago at 74% good to excellent, while soybeans improved to 73% good to excellent from last week's 72%.
In Iowa, the top corn and soybean producer, corn harvest was 5% versus 26% average while soybeans were 9% harvested versus the 42% average.
Spring wheat 96% harvested; winter wheat 56% planted
Spring wheat harvest advanced to 96%, but trailed the 99% five-year average. In North Dakota, the largest producer, harvest was 95% done versus 98% average
Winter wheat planting was at 56% as of Sunday, ahead of the 53% average. Kansas, the largest wheat producer, was at 51% planted versus the 54% average.
The U.S. winter wheat was 28% emerged, compared with the 24% average, with Kansas emergence at 26% emerged versus the 22% average.
The Kansas state report said rain fell last week in north central and eastern areas, but statewide there were still 5.3 days suitable for fieldwork.
Topsoil moisture in Kansas improved slightly to 3% surplus, 63% adequate, 26% short and 8% very short from the previous week's 2%, 62%, 27%, and 9%.
Cotton: 15% harvested, 73% had bolls open
The cotton harvest at 15% was slightly behind the 18% five-year average. Bolls were open on 73% of the crop, compared with the 79% average. The crop condition slipped slightly to 47% good to excellent from last week's 49%.
Sorghum was 37% harvested and 67% mature, versus the respective averages of 38% and 64%. It was unchanged at 57% good to excellent.
Rice was 70% harvested compared with the 71% average.
View the full Oct. 6 USDA Crop Progress and Condition update.