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Soil N dynamics and yield of barley grown on breton loam using N from biological fixation or fertilizer

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Relation http://oar.icrisat.org/3556/
http://dx.doi.org/10.1007/BF00369382
 
Title Soil N dynamics and yield of barley grown on breton loam using N from biological fixation or fertilizer
 
Creator Wani, S P
McGill, W B
Robertson, J A
 
Subject Soil Science
 
Description Soil N dynamics and barley yields were compared in pot experiments using surface samples from a Gray Luvisol under three cropping systems at Breton, Alberta: (1) an agroecological 8-year rotation including cereals, forage, and fababeans (Vicia faba) as green manure; (2) a continuous grain system, with fertilizer N at 90 kg/ha per year; and (3) a classical Breton 5-year rotation involving forage and cereals, without returning crop residues to the land. The fertilizer N equivalent for the cropping system, 'AN' value and 'A' value (analogous to AN, but in fertilizer 15N units), soil biomass, and C and N mineralization were monitored. It was concluded that past soil history may be associated more with the ability of barley plants to compete for available N, and hence the use of N, than with net soil N mineralization; and that an increased supply of N to crops following the incorporation of fababean residues, manure application, and the soil N-conserving effect of growing legumes were all partly responsible for the observed differences in soil fertility
 
Publisher Springer Verlag
 
Date 1991
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/3556/1/BiolFertilSoils12_1_10-18_1991.pdf
Wani, S P and McGill, W B and Robertson, J A (1991) Soil N dynamics and yield of barley grown on breton loam using N from biological fixation or fertilizer. Biology and Fertility of Soils, 12 (1). pp. 10-18. ISSN 0178-2762