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Published online 21 June 2006
Published in Soil Sci Soc Am J 70:1359-1369 (2006)
DOI: 10.2136/sssaj2005.0298
© 2006 Soil Science Society of America
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Right arrow Nitrogen

Recovery of Nitrogen in Fresh and Pelletized Poultry Litter by Rice

Bobby R. Goldena,*, Nathan A. Slatona, Richard J. Normanb, Edward E. Gbur, Jr.c, Kristofor R. Bryeb and Russell E. DeLonga

a Dep. of Crop, Soil, and Environmental Sciences, Univ. of Arkansas, 1366 West Altheimer Drive, Fayetteville, AR 72704
b Dep. of Crop, Soil, and Environmental Sciences, Univ. of Arkansas, 115 Plt. Sci. Bldg., Fayetteville, AR 72701
c Agric. Statistics Lab., Univ. of Arkansas, Fayetteville, AR 72701


Figure 1
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Fig. 1. Net-N uptake by rice at panicle differentiation as affected by N rate and N source for research trials managed with a normal (NF) flood at the Pine Tree Branch Station (PTBS) and Rice Research Extension Center (RREC) in 2003 (03) and 2004 (04) on silt loams.

 

Figure 2
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Fig. 2. Net-N uptake by rice at heading as affected by N rate, N source, and site-year for research trials managed with a normal (NF) or delayed flood (DF) at the Pine Tree Branch Station (PTBS) and Rice Research Extension Center (RREC) in 2003 (03) and 2004 (04) on silt loams.

 

Figure 3
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Fig. 3. Net rice grain yield at physiological maturity as affected by N rate and N source for research trials managed with a normal (NF) or delayed flood (DF) at the Pine Tree Branch Station (PTBS) and Rice Research Extension Center (RREC) in 2003 (03) and 2004 (04) on silt loams.

 

Figure 4
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Fig. 4. Net rice grain yield as affected by N rate and N source for research trials conducted on five silt loam soils using actual urea-N rates (≤101 kg N ha–1) and fresh and pelleted litter N rates (≤270 kg total-N ha–1) (Fig. 4A) and a comparison of actual urea-N rates (≤101 kg N ha–1) with poultry litter total-N rates adjusted to urea-N fertilizer equivalents (Fig. 4B). For Fig. 4A, mean net grain yields for each site-year are shown as {circ} for urea, {blacktriangleup} for pelleted litter, and {triangledown} for fresh litter.

 





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