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Phosphorus Accumulation in Cultivated Soils from Long-Term Annual Applications of Cattle Feedlot Manure

Joann K. Whalen and Chi Chang

Research Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada



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  		Fig. 1. Annual P uptake by barley grown on soil amended annually with various rates of feedlot manure under (A) nonirrigated and (B) irrigated conditions. Values are means (±standard errors)

 


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  		Fig. 2. Annual changes in total soil P to a depth of 150 cm in (A) nonirrigated and (B) irrigated soils amended annually with different rates of feedlot manure. Values are means (±standard errors)

 


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  		Fig. 3. Annual changes in available soil P to a depth of 150 cm in (A) nonirrigated and (B) irrigated soils amended annually with different rates of feedlot manure. Values are means (±standard errors)

 


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  		Fig. 4. Recovery of P from manure in crop and soil P (to the 150-cm depth) pools in nonirrigated plots receiving annual manure applications of (A) 30, (B) 60, and (C) 90 Mg ha-1

 


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  		Fig. 5. Recovery of P from manure in crop and soil P (to the 150-cm depth) pools in irrigated plots receiving annual manure applications of (A) 60, (B) 120, and (C) 180 Mg ha-1

 




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The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Soil Science Society of America Journal Journal of Plant Registrations The Plant Genome
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