Canadian Journal of Plant Science · 1965 · 16 citations · 1 references
AgricultureAgronomySoil SciencesNutrient ManagementSoil FertilitySoil ScienceNitrogen CycleNitrogen ManagementNitrogen NutritionPhosphorus NutritionSoil - Vegetation InteractionsSoil-plant Nutrient RelationsFertilizer Response In PasturesHerbage Yield ResponseNative Grass SeedingNitrogen Effects On YieldNitrogen Fertilization EffectsNitrogen Fertilizer ManagementNitrogen Management In Pastures
N, P, and N + P at 60, 26, and 60 + 26 lb per acre were applied on native grass sites during three successive years at seven, locations in Western Canada. Single applications of the N fertilizer resulted in 3- or 4-year total yield increases of 300 to 600 lb per acre at six locations. At Summerland the 3-year increase was nearly 1400 lb. Phosphorus fertilizer by itself provided very little yield increase. N + P gave yield increases that were only slightly better than those from N alone.Residual responses to fertilizer were important, especially in the 12- to 16-in. rainfall locations. Only about one-third of the total yield increase occurred in the first year, with the remainder coming in the subsequent seasons.Weeds, where present, showed a marked response to fertilizer N in the first season; in subsequent years the response largely disappeared.
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