Browsing by Author "Slinkard, A.E."
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Item Agronomic studies with Fenugreek(1992-02-20) Slinkard, A.E.; Vandenberg, A.Item Bi-directional nitrogen transfer between legume and non-legume plants(1992-02-20) Tomm, G.O.; van Kessel, C.; Slinkard, A.E.; Embrapa, P.F.Non-N2-fixing crops inter-cropped with legumes may benefit through transfer of symbiotically fixed N from the legume crop. The pattern of N transfer by mechanisms non dependent on decomposition of plant tissues was studied in a greenhouse. In addition, a study accessed the effect of inter-cropped alfalfa (Medicago sativa L.) on meadow bromegrass (Bromus riparius Rhem.) forage and N yield by a combination of N transfer mechanisms occurring under field . conditions. In the first study, shoot portions of one alfalfa or one bromegrass plant (donor) were foliarly fed with N labelled ammonium sulphate. No 15N from bromegrass was transferred to alfalfa, whereas 15N from alfalfa plants was transferred mainly to bromegrass plants. Transfer of 15N between plants of the same species was not significant in alfalfa and only detected in the nearest plant of bromegrass. The 15N content of the receptor plants showed that underground movement of N between plants occurred within 3 days. In the field study, swards of single bromegrass and alfalfa inter-cropped with bromegrass were seeded in rows 17. 8 cm apart. In the fell owing year individual rows of plants, adjacent to each other, on both sides of the edge between the different swards were harvested separately for dry matter (DM) and N yield. Results of bromegrass were related to distance from the nearest row of alfalfa. Forage yield gradually increased from 427 to 1230 kg ha-1 and N yield increased from 53 to 184 kg ha-1 as the distance between the bromegrass row and the alfalfa row decreased from 71.1 to 17. 8 cm. Yield of bromegrass located up to 35.6 cm from alfalfa was significantly increased, indicating transfer of N from alfalfa to bromegrass in agronomically relevant amounts.Item Chickpea production in Saskatchewan?(1982-02-18) Slinkard, A.E.Item Crop species for maximum production and good agronomic practice(1974-02-06) Slinkard, A.E.Item Dry bean production on dryland in Saskatchewan(1992-02-20) Vandenberg, A.; Slinkard, A.E.; Whatley, N.R.Item Effect of annual legume green manure crops on yield and protein content of wheat(1985-02-19) Townley-Smith, L.; Slinkard, A.E.Item Effect of annual legume green manures on yield and quality of wheat on a Brown loam(1988-02-19) Biederbeck, V.O.; Slinkard, A.E.Item Effect of herbicides on growth and nitrogen fixation potential (ARA) of field pea and lentil(1986-02-20) Germida, J.J.; Slinkard, A.E.; Nelson, L.M.; McKercher, R.B.Item The effect of phosphate placement on the growth of selected crops(1977-02-08) Slinkard, A.E.; Henry, J.L.Item The effect of sulphur fertilizer on the agronomic traits of dry pea in Saskatchewan(1992-02-20) Ferrie, J.; Slinkard, A.E.Item Evaluation of dry bean (Phaseolus vulgaris L.) as an alternative grain and seed production crop for irrigated regions of south-central Saskatchewan(1988-02-19) Vandenberg, A.; Slinkard, A.E.Item Growth and nitrogen fixation of field pea and lentil as influenced by herbicides: a three year field study(1988-02-19) Germida, J.J.; Slinkard, A.E.; Nelson, L.M.; McKercher, R.; Walley, F.L.A three-year field study was conducted in the Dark Brown and Black Soil Zones of Saskatchewan to assess the effects of trifluralin (Treflan ), metribuzin (Sencor), MCPB (Tropotox), and sethoxydim (Poast) on growth and symbiotic nitrogen fixation of field pea (Pisum sativum cv. Trapper) and lentil (Lens culinaris cv. Eston). Herbicides were applied at Saskatchewan recommended field rates and twice the recommended field rates. Treflan, Sencor, and Poast did not adversely affect plant growth or nitrogen fixation potential of field pea and lentil when applied at recommended field rates. Similarly, application of MCPB at the recommended rate did not adversely affect field pea under normal growing conditions. In some instances, herbicide application at the recommended rate was observed to have a stimulatory effect on growth and nitrogen fixation. In contrast, at application rates in excess of those currently recommended in Saskatchewan, or when plants were severely stressed by unfavorable growing conditions such as poor soil moisture, plant growth, yield, nodulation, and nitrogen fixation were adversely effected by herbicides. These effects were not consistent nor were they predictable. MCPB is not registered for use in lentil and, when applied in this crop, often resulted in reduced nitrogen fixation and seed yield. In all cases, data suggest that reductions in the nitrogen fixation potential were due to indirect effects of herbicide application on plant growth rather than to direct effects on nodulation and nitrogenase activity.Item Indianhead lentil as a fallow substitute in the Dark Brown Soil Zone(1987-02-19) Slinkard, A.E.; Biederbeck, V.O.Item Lentil management in western Canada(1979-02-19) Slinkard, A.E.Item Performance of annual legume green manure crops at Saskatoon(1986-02-20) Townley-Smith, L.; Slinkard, A.E.Four annual legumes, lentil (Lens culinaris cv. 'NEL-481'), field pea (Pisum sativum cv. 'Trapper'), faba bean (Vicia faba cv. 'Outlook'), Tangier flatpea (Lathyrus tingitanus cv. 'Tinga'), and one perennial, alfalfa (Medicago sativa cv. 'Moapa') were compared over three growing seasons for their suitability as annual green manure crops grown in the fallow year of a wheat-fallow rotation. As nitrogen-fixation usually declines after seed set, crop growth was stopped by cultivation or desiccation during early pod filling. This terminated further use of available soil moisture, conserving it for the following grain crop. Mean seasonal nitrogen fixation ranged from 2 to 40 kg/ha. However, the mean total nitrogen in the top growth at plow down, ranged from 15 to 114 kg/ha. The measured nitrogen fixation accounted for 13 to 42 % of the above ground nitrogen. There was little difference in water use among the legume crops.Item Phosphorus fertilization and irrigation of pulse crops(1979-02-19) Slinkard, A.E.; Henry, J.L.Item The potential for irrigated dry bean production in Saskatchewan(1989-02-16) Vandenberg, A.; Slinkard, A.E.