Browsing by Author "Walley, F."
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Item Assessing soil N availability indices - is inorganic N enough?(2003-02-18) Walley, F.; Yates, T.; Jokic, A.; Masutti, M.Assessing soil N availability is complicated enormously by the complexity of the N-cycle. Over the years, several methods of estimating potentially available N have been suggested. In an ongoing study, we have been assessing the suitability of a number of these methods for predicting potential crop response to fertilizer N. In particular, we correlated amino-sugar N levels to wheat yield across a variable landscape. This relatively new soil N test appears to be sensitive to changes in organic matter quality as related to landscape position and holds some promise for assessing potentially available N. The results presented here are preliminary.Item Assessing the efficacy of nitrification and urease inhibitors on reducing gaseous N losses in forage seed production of the Saskatchewan parkland region(2014-03-11) Yannikos, N.; Walley, F.; Farrell, R.Item Bean quest 2002: the final frontier(2002-02-20) Vandenberg, B.; Walley, F.; Nleya, T.; Banniza, S.; Warkentin, T.; Shirtliffe, S.; McVicar, R.The agronomic, economic and genetic pieces of the jigsaw puzzle for developing a dryland bean industry in Saskatchewan are coming together. In 2002, dryland bean growers in Southeastern Saskatchewan made a profit using new varieties of black and pinto bean. Much of the credit for this goes to the hard work, homework, and perseverance of the crop clubs that have developed around the province in the past few years. The research and development effort of the past 10 years is finally starting to pay dividends in the dry bean sector of the pulse industry. In this paper, we would like to briefly summarize some of the key results of various dry bean research and development projects that have been underway in the past few years.Item Effect of “starter” N and P on nodulation and seed yield in field pea, lentil, and chickpea in semiarid Canadian prairies(2004-02-19) Gan, Y.; Clayton, G.W.; Lafond, G.; Johnson, A.; Walley, F.; McConkey, B.G.Item The effects of cultivar on nodulation, seed yield, and dinitrogen fixation of dry bean (Phaseolus vulgaris L.)(2001-02-22) Nleya, T.; Walley, F.; Vandenberg, A.Item How mycorrhizal fungal bio-fertilizer impact on seed yield of field pea and wheat across Saskatchewan prairies(2014-03-11) Islam, N.; Walley, F.; Germida, J.Item The impact of inoculation on the tripartite association between pulse crops, rhizobia, and arbuscular mycorrhizal fungi(2013-03-05) Biswaray, A.; Germida, J.J.; Walley, F.Item Management of fertility in the pulse-based cropping systems of western Canada(2004-02-19) Gan, Y.; McConkey, B.G.; Clayton, G.W.; Lafond, G.; Johnson, A.; Walley, F.Item Marginal copper soil test range – does it exist?(2001-02-22) Karamanos, R.E.; Haderlein, L.; Walley, F.; Goh, T.B.Item N2 fixation of common bean in dryland production systems: effects of cultivar and inoculation method(1999-02-25) Nleya, T.M.; Walley, F.; Vandenberg, A.Item Nitrogen-15 recovery by spring wheat as influenced by landscape position and nitrogen fertilizer source(1999-02-25) Matus, A.; Hnatowich, G.; Walley, F.; van Kessel, C.; Knight, J.D.Item Productivity and N-fixation of legume-cereal intercrops and their monocrop counterparts in organic cropping systems(2007-03-01) Marufu, G.; Walley, F.; Knight, J.D.In recent years, western Canada has seen considerable growth in organic production. This is due to heightened environmental awareness, reduced input costs, diversification of market opportunities, and food safety aspects. On the prairies, organic production generally includes the use of annual green manure (GrM) crops, which are plowed under to add nutrients to the soil. However, in a GrM plow-down year, farmers face loss of income. One alternative to growing a traditional GrM could be growing legumes alone or intercropping them with cereals and managing them as green feed forage (GF) for use on-farm or for sale to local livestock producers without compromising soil fertility levels. Intercropping legumes with cereals may be a novel approach to problems of nitrogen (N) supply as the legume may provide N to the current and subsequent crops. It was hypothesized that by intercropping the legume with a cereal, the inorganic N supply would be reduced to levels where N fixation in the legume would be stimulated. This study (i) compared yield in monoculture legume with legume-cereal intercrops (ii) investigated whether increasing cereal density stimulated the legume to fix more N (iii) Compared yield of a cereal grown after the GrM and GF crop treatments. The study included mixtures of feed pea (Pisum sativum cv 40-10 silage pea), oat (Avena sativa L.cv AC Morgan), and triticale (X Triticosecale Wittmack cv Pika). The experiment consisted of 16 treatments and 4 replicates in which feed pea, oat, and triticale were grown alone or in combination and managed as GrM or GF. Wheat and fallow (tillage) served as cropped and uncropped controls respectively. The intercropped oat was seeded at three densities (50, 100, and 150 plants m-2). In the second year, wheat was seeded in all plots. In this paper, biomass, total nitrogen (N), and nitrogen derived from the atmosphere (Ndfa) of treatments and subsequent yields of wheat grown after the treatments at the Delisle site are discussed. Results show that the oat (4238 kg ha-1) and fieldpea + oat 2 (3630 kg ha-1) treatments had the highest biomass whereas the triticale (1357 kg ha-1) treatment had the lowest. Among the intercrops, only the fieldpea + oat 2 treatments had higher total nitrogen (91.61 kg ha-1) than their monocultures, with the oat treatment being the least (45 kg ha-1). The highest %Ndfa was achieved at the highest intercropped cereal density of fieldpea + oat 1 (84%). Wheat grain yield were consistently higher following GrM treatments whereas biomass removal significantly compromised subsequent wheat yields in the GF treatments.Item Response of transplanted Chernozems towards C addition after 21 years of identical climatic, topographic, and management practices(2016-03-15) Katulanda, P.; Walley, F.; Helgason, B.Item Soil origin and land use history determine C cycling in transplanted soils after 21 years(2017-03-06) Katulanda, P.; Walley, F.; Helgason, B.Item Summary of precision farming research in the Department of Soil Science(2000-02-22) Pennock, D.; Walley, F.; Solohub, M.; Hnatowich, G.A three-year field study was initiated in 1996 to measure the inherent fertility variations in typical Saskatchewan landscapes and to determine the different yield responses of wheat and canola to fertilizer rates in these landscapes. Our objective was to assess the agronomic and economic feasibility of variable rate fertilizer (VRF) application for wheat and canola. Results suggest that the response of canola to fertilizer application was strongly tied to spring moisture availability which, in turn, was directly related to landscape position. Because canola yield responses were relatively consistent (and thus predictable) from year to year (although the overall mean varied depending on spring soil moisture), we concluded that canola appears to be an excellent crop choice for VRF. In contrast, wheat did not respond consistently to fertilizer N application from year to year, limiting the potential for VRF in wheat.Item Synchronizing nitrogen application with uptake using urease and nitrification inhibitors to maximize nitrogen use in forage seed stands in northeastern Saskatchewan(2014-03-11) Woodhouse, J.; Walley, F.; Farrell, R.E.Item The use of soil amendments in the revegetation process of smelter-impacted soils(2013-03-05) Specht, C.; Walley, F.; Knight, J.D.Item Variability of ammonium and nitrate in disturbed and undisturbed forest soils(1994-02-24) Walley, F.; Pennock, D.; van Kessel, C.The spatial distribution of NH4+- and N03--N in forest soils, as affected by site disturbance, was studied at the landscape-scale. A sampling grid, consisting of 169 points, was established at an undisturbed site located in Prince Albert National Park. Additional grids, consisting of 36 and 49 sampling points, were established at a burned and a clear-cut site, respectively. Similar levels of inorganic-N at the undisturbed and disturbed sites suggests that management practices had little effect on the availability of inorganic-N. Similarly, the spatial distribution of inorganic-N was not related to landform element complexes, suggesting that hydrologic processes were not the primary factor controlling the distribution of inorganic-N at the scale studied. The occurrence of NH4+ -N as the dominant inorganic-N form suggests that nitrification was strictly limited in these forest soils. This contrasts agricultural soils in which nitrification often proceeds swiftly in the presence of NH4+-N.