Agri-News, February 7, 2008, Vol. 8, no. 2

Crop and livestock summaries for the state of Iowa, produced by the Iowa Department of Agriculture.

Soil aggregation in a crop-livestock integration system under no-tillage

Grazing intensities can influence soil aggregation, which can be temporarily and permanently affected. The objective of this study was to evaluate the aggregate stability in water at the end of a soybean cycle and during pasture development in a crop-livestock integration system under no-tillage and grazing intensities. The experiment was initiated in 2001, in a dystrophic Red Latosol, after soybean harvest. Treatments consisted of pasture (black oat + Italian ryegrass) at heights of 10, 20 and 40 cm, grazed by young cattle, and a control (no grazing), followed by soybean cultivation, in a randomized block design. Soil samples were collected at the end of the soybean cycle (May/2007), during animal grazing (September/2007) and at the end of the grazing cycle (November/2007). The grazing period influences aggregate distribution, since in the September sampling (0-5 cm layer), there was a higher proportion of aggregates > 4.76 mm at all grazing intensities. Soil aggregation is higher in no-tillage crop-livestock integration systems in grazed than in ungrazed areas.

Agri-News, March 7, 2008, Vol. 8, no. 3

Crop and livestock summaries for the state of Iowa, produced by the Iowa Department of Agriculture.

Agri-News, April 8, 2008, Vol. 8, no. 5

Crop and livestock summaries for the state of Iowa, produced by the Iowa Department of Agriculture.

Agri-News, April 11, 2008, Vol. 8, no. 6

Crop and livestock summaries for the state of Iowa, produced by the Iowa Department of Agriculture.

Agri-News, May 7, 2008, Vol. 8, no. 7

Crop and livestock summaries for the state of Iowa, produced by the Iowa Department of Agriculture.

Agri-News, June 6, 2008, Vol. 8, no. 8

Crop and livestock summaries for the state of Iowa, produced by the Iowa Department of Agriculture.

Agri-News, July 8, 2008, Vol. 8, no. 9

Crop and livestock summaries for the state of Iowa, produced by the Iowa Department of Agriculture.

Agri-News, July 8, 2008, Vol. 8, no. 10

Crop and livestock summaries for the state of Iowa, produced by the Iowa Department of Agriculture.

Agri-News, August 7, 2008, Vol. 8, no. 11

Crop and livestock summaries for the state of Iowa, produced by the Iowa Department of Agriculture.

Agri-News, August 19, 2008, Vol. 8, no. 12

Crop and livestock summaries for the state of Iowa, produced by the Iowa Department of Agriculture.

Agri-News, September 2, 2008, Vol. 8, no. 13

Crop and livestock summaries for the state of Iowa, produced by the Iowa Department of Agriculture.

Agri-News, September 19, 2008, Vol. 8, no. 14

Crop and livestock summaries for the state of Iowa, produced by the Iowa Department of Agriculture.

Agri-News, October 7, 2008, Vol. 8, no. 15

Crop and livestock summaries for the state of Iowa, produced by the Iowa Department of Agriculture.

Agri-News, October 17, 2008, Vol. 8, no. 16

Crop and livestock summaries for the state of Iowa, produced by the Iowa Department of Agriculture.