Corn Response to Composting and Time of Application of Solid Swine Manure
Terrance D. Loeckea,
Matt Liebman*,b,
Cynthia A. Cambardellac and
Tom L. Richardd
a Dep. of Crop and Soil Sci., Michigan State Univ., 539 Plant and Soil Sciences Bldg., East Lansing, MI 48824-1325
b Dep. of Agron., 3405 Agronomy Hall, Iowa State Univ., Ames, IA 50011-1010
c USDA-ARS, 310 Natl. Soil Tilth Lab., Ames, IA 50011-3120
d Dep. of Agric. and Biosyst. Eng., 3222 Natl. Swine Res. and Inf. Cent., Iowa State Univ., Ames, IA 50011-3080

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Fig. 1. (a) Monthly average daily temperature and (b) total precipitation for 2000, 2001, and the 50-yr average at a weather station located <1 km from the field sites.
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Fig. 2. Grain yield from urea N rates side-dressed at plant growth stage V6 and fresh manure and compost treatments from 2000 and 2001. Error bars represent plus/minus one standard error. Grain yields were adjusted to a moisture content of 155 g kg1. Treatment contrasts are presented in Table 6.
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Copyright © 2004 by the American Society of Agronomy.