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Copyright of Canadian Journal of Plant Science is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Plant Science is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Plant Science is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The article discusses a study which explored the effect of irrigation on the recovery of broadcast 15 nitrogen (N)-labelled fertilizer, applied during the final year of a three-year rotation, by willow varieties Charlie and SV1. It describes a split-split-plot experiment conducted in Saskatoon, Saskatchewan. Results showed that irrigation increased fertilizer N accumulation by Charlie, but not SV1. Irrigation also increased the N use efficiency (NUE) for both varieties' all plant tissues.

Land application of manure constitutes an effective means of recycling manure nutrients to the soil. However, odours from manure application activities can hinder the expansion of the livestock industry because of the potential nuisance to neighbours. The objective of this study was to assess the efficiency of subsurface application at reducing odours from both solid and liquid manure applications. Flux chambers and dynamic dilution olfactometry were used to assess odours from two manure types (solid and liquid) applied at four application rates using surface and subsurface application methods. The results of the study indicated that odour concentrations from subsurface application plots were up to 66% (37% on average) lower than concentrations from plots where the manure was surface applied. Subsurface application seemed to have a larger impact on reducing odours from solid manure than liquid manure, mainly due to better manure coverage after subsurface application of solid manure. Odours from solid manure applications measured immediately after application were also 37% lower than from liquid manure applications. In general, odours from liquid and solid manure increased with higher application rates, but there was little difference among the low, mid, and high application rates. Based on the results of this study, subsurface application of manure is an effective way to reduce the overall odour emissions from manure spreading, particularly for solid manure. [ABSTRACT FROM AUTHOR]

A polyhouse study was conducted to evaluate the relative effectiveness of different micronutrient fertilizer formulation and application methods on wheat, pea and canola, as indicated by yield response and fate of micronutrients in contrasting mineral soils. The underlying factors controlling micronutrient bioavailability in a soil-plant system were examined using chemical and spectroscopic speciation techniques. Application of Cu significantly improved grain and straw biomass yields of wheat on two of the five soils (Ukalta and Sceptre), of which the Ukalta soil was critically Cu deficient according to soil extraction with DTPA. The deficiency problem was corrected by either soil or foliar application of Cu fertilizers. There were no significant yield responses of pea to Zn fertilization on any of the five soils. For canola, soil placement of boric acid was effective in correcting the deficiency problem in Whitefox soil, while foliar application was not. Soil extractable Cu, Zn, and B concentration in post-harvest soils were increased with soil placement of fertilizers, indicating that following crops in rotation could benefit from this application method. The chemical and XANES spectroscopic speciation indicates that carbonate associated is the dominant form of Cu and Zn in prairie soils, where chemisorption to carbonates is likely the major process that determines the fate of added Cu and Zn fertilizer.