Browsing by Author "Rennie, D.A."
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Item 1957 Tracer Fertilizer Research Report(Department of Soil Science, University of Saskatchewan, Saskatoon, SK, 5/1/1958) Rennie, D.A.; Day, T.C.Item 1958 Tracer Fertilizer Research Report(Department of Soil Science, University of Saskatchewan, Saskatoon, SK, 5/1/1959) Rennie, D.A.Item 1959 Tracer Fertilizer Research Report(Department of Soil Science, University of Saskatchewan, Saskatoon, SK, 6/1/1960) Rennie, D.A.Item 1960 Soil Plant Nutrient Research Report(Department of Soil Science, University of Saskatchewan, Saskatoon, SK, 6/1/1961) Rennie, D.A.Item 1963-1964 Soil Plant Nutrient Research Report(Department of Soil Science, University of Saskatchewan, Saskatoon, SK, 1/1/1965) Rennie, D.A.; Hutcheon, W.L.Item 1965 Soil Plant Nutrient Research Report(Department of Soil Science, University of Saskatchewan, Saskatoon, SK, 6/1/1966) Rennie, D.A.; Rice, W.A.; Henry, J.L.Item 1966 Soil Plant Nutrient Research Report(Department of Soil Science, University of Saskatchewan, Saskatoon, SK, 9/1/1967) Rennie, D.A.Item 1967 Soil Plant Nutrient Research Report(Department of Soil Science, University of Saskatchewan, Saskatoon, SK, 3/1/1968) Rennie, D.A.; Halstead, E.H.; Rice, W.A.Item A 25-year review of fertilizer consumption and plant nutrient removal in the prairie provinces(1992-02-20) Doyle, P.J.; Cowell, L.E.; Rennie, D.A.; Campbell, C.A.Nutrient removal I replacement ratios were calculated in Manitoba, Saskatchewan, and Alberta from 1965 to 1989 by dividing total fertilizer (N, P, and K) sales by the total crop removal of plant nutrients. The nutrient removal I replacement ratios revealed that significant depletions of soil reserves of N, P, and K have taken place over the past 25 years. The average negative balance of N, P2O5, and K2O on the prairies is estimated at 640, 125, and 490 thousand tonnes. Even with the substantial increase in the use of fertilizers in the past five years compared to the 25 year average, the nutrient deficit continues to be unacceptably high for nitrogen (485,000 tonnes), only modest for phosphorus (86,000 tonnes), and as could be expected for potassium, has increased significantly to 570,000 tonnes. Overall, the calculations suggest that Manitoba is very close to nitrogen and phosphorus balance. Alberta has a relatively close balance, while Saskatchewan has not only experienced an unacceptably high N and P deficit for the past 25 years, but continues to do so at the present time.Item Crop utilization and fate of fertilizer nitrogen in soil(1977-02-08) Paul, E.A.; Rennie, D.A.Item The effect of fall stubble management on over-winter recharge and grain yield(1985-02-19) Kachanoski, R.G.; de Jong, E.; Rennie, D.A.Item The effect of inoculation on yields of grain legumes(1985-02-19) Voroney, R.P.; Rennie, R.J.; Rennie, D.A.Item Effect of rhizobial strain on lentil N2-fixation and yield(1987-02-19) Bremer, E.; Rennie, R.J.; Rennie, D.A.Item The effect of tillage and crop residue management on grain yields(1985-02-19) Voroney, R.P.; Rennie, D.A.Item The effect of variable and uniform N-fertilizer application rates on grain yield(1985-02-19) Kachanoski, R.G.; Voroney, R.P.; de Jong, E.; Rennie, D.A.Item Estimating the effect of management on landscape yields(1986-02-20) Brydon, J.; Rennie, D.A.Item Fertilizer management practices for winter wheat(1984-02-13) Rennie, D.A.; Wood, M.; Valby, J.; Voroney, R.P.Nitrogen (N) management practices for winter wheat including side banding at time of seeding, broadcasting in early December, and in April, were evaluated at nine locations in the province. Under the widely ranging climatic conditions that prevailed over the 1982-83 winter period and the 1982 growing season, side banding the N at time of seeding in the fall was equally as good as broadcasting the N in mid-April. Broadcast applications of urea made in early December resulted in disappointing yield increases. It is concluded from these experiments that where the nitrogen is side banded in the fall, spring wheat soil test guidelines for the humid areas of the province should be applicable to winter wheat grown in any soil zone. Unequal distribution of crop residues was shown to seriously reduce yields of winter wheat, possibly as a result of the production of phytotoxic compounds.Item A macronutrient bulletin for the prairies(1994-02-24) Rennie, D.A.; Campbell, C.A.; Roberts, T.L.This paper briefly highlights some of the contents of a recently completed bulletin, which provides an up-to-date record of the status of our knowledge with regards to crop responses to, and impact on the environment of N, P, K and s, on the Canadian prairies. This 12 Chapter, 527 page book presents information on nutrient balances, trends in fertility levels of soils, nitrogen use efficiency, N, P, K and S cycles, fertilizer N practices, the influence of nutrients on soil organic matter, response of. forages to nutrients, biotechnology and crop nutrition, and the impact of nutrients on the environment. This manuscript, which was prepared through funding provided under the Canada-Saskatchewan Environmental Sustainability Initiative (ESI), should be of considerable assistance to students, educators, scientists and agricultural extensionists in the three prairie provinces.Item Nitrogen fixation of several grain legumes in Saskatchewan(1986-02-20) Bremer, E.; Rennie, D.A.; Rennie, R.J.; Voroney, R.P.Item Procal field test trials(1968-02-12) Rennie, D.A.