Soil Variables and Interactions Affecting Prediction of Crop Yield Pattern

Bruce, R. R.; Snyder, Willard M.; Whiter, A. W.; Thomas, A. W.; Langdale, G. W.

doi:10.2136/sssaj1990.03615995005400020034x

Cited by 17 publications

(7 citation statements)

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“…The results of this study suggest that whether applying nitrogen fertilizer to boost low fertility areas, as described by Bruce et al (1990), or to cater to areas of apparently higher crop yield potential, as described by Manning et al (2001c), the application of nitrogen fertilizer to wild oatinfested fields increases wild oat competitiveness. In this study, there was no significant effect of landscape position on wild oat competitiveness in wheat, which suggests that, for landscapes where there are not considerable differences in soil characteristics between landscape positions, and especially in years of normal or above-normal rainfall, landscape-specific applications of nitrogen fertilizer will not affect wild oat competitiveness in a manner any different from uniform applications.…”

Section: Discussionmentioning

confidence: 84%

Effect of nitrogen fertilizer and landscape position on wild oat (Avena fatua) interference in spring wheat

Ross

Acker

2005

Weed Science

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Site-specific fertilizer application is of primary interest among those investigating site-specific crop management. Site-specific soil moisture levels may be associated with the relative success of certain weed species, and weed competition can be affected by fertilizer application. A field study was conducted to investigate how landscape position–based site-specific nitrogen fertilizer application would influence wild oat interference in spring wheat. Wild oat was allowed to grow in spring wheat at foot and knoll landscape positions in the presence or absence of 80 to 90 kg ha−1 of spring preseed broadcast nitrogen fertilizer. In all three site–years of the study, landscape position did not affect wild oat competitiveness in wheat or relative wild oat biomass, and there were no significant landscape position by nitrogen fertilizer interactions for these variables. The lack of landscape position effect may be attributed to the lack of substantive differences in soil characteristics between landscape positions at the sites used in this study and to normal to above-average seasonal precipitation levels in all three site–years. Wild oat competitiveness in wheat was significantly greater in the presence of nitrogen fertilizer for all three site–years. The results of this study suggest that, when there are not great differences in typical soil characteristics between landscape positions and precipitation levels are normal or above normal, landscape-based site-specific nitrogen fertilizer application does not affect wild oat competitiveness in spring wheat, but preseed spring broadcast nitrogen fertilizer does make wild oat more competitive in spring wheat.

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Section: Discussionmentioning

confidence: 84%

Effect of nitrogen fertilizer and landscape position on wild oat (Avena fatua) interference in spring wheat

Ross

Acker

2005

Weed Science

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“…The Lethbridge Irrigated site received ≈ 175 mm of irrigation water each growing season to ensure that root zone soil moisture was non-limiting. Grain and straw yields (1990-1991at Lethbridge Dryland, Lethbridge Irrigated and Taber, 1991 and weather conditions during the 2-yr study have been reported by Larney et al (2000).…”

Section: Methodsmentioning

confidence: 82%

“…Janzen et al (1991) outlined several other methods by which variability in soil quality attributes can be introduced to a soil system. These include indigenous variability in landscape (Bruce et al 1990), exploiting long-term crop rotation studies that have introduced diversity in soil properties, and the artificial creation of variability by re-location of topsoils (Olson et al 1996). Simulated erosion is probably more cost-effective and less time-consuming than the above approaches.…”

Section: Mots Clésmentioning

confidence: 99%

Soil quality and productivity responses to simulated erosion and restorative amendments

Larney¹,

Janzen²,

Olson³

et al. 2000

Can. J. Soil. Sci.

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Soil quality and productivity responses to simulated erosion and restorative amendments. Can. J. Soil Sci. 80: 515-522. There is little quantitative information on the interrelatedness of soil erosion, soil quality and soil productivity. A simulated erosion approach was used to quantify erosion and amendment effects on soil quality and subsequent productivity at four southern Alberta sites. Zero, 5, 10, 15 and 20 cm of topsoil were removed (cuts) at each site and subplots were amended with N + P fertilizer, 5 cm topsoil, 70 Mg ha -1 cattle manure or left unamended. Wheat (Triticum aestivum L.) yields in the 2-yr study on the non-amended check plots showed significant correlations with organic C at three of the four sites, and extractable P and inorganic C at all four sites. While manure was the best amendment for enhancing soil productivity, the magnitude of its effect depended on the organic C content of the recipient soil. At an organic C content of 8 g kg -1 on the Lethbridge Dryland site, manure addition increased crop yield by 1.75 Mg ha -1 , compared with only 0.27 Mg ha -1 at an organic C content of 15 g kg -1 . Our results affirm the benefits of soil management practices that reduce erosion risk, preserve soil quality and sustain productivity. Il n'existe que peu d'information quantitative sur les rapports entre l'érosion, la qualité et la productivité du sol. Nous avons eu recours à la simulation pour quantifier les effets de l'érosion du sol et d'amendements correctifs sur la qualité des sols et sur leur productivité à quatre emplacements du sud de l'Alberta. À chaque emplacement, zéro, 5, 10, 15 et 20 cm du sol de surface étaient enlevés par décapage et les sous-parcelles recevaient une fumure Net P, un apport de 3 cm de terre de surface, 70 Mg ha -1 de fumier de bovins ou aucun correctif. Le rendement du blé (Triticum aestivum L.) dans les deux années de l'expérience dans les parcelles témoins non amendées manifestait une corrélation significative avec la teneur en C organique du sol à trois des quatre emplacements et avec le P extractible et le C minéral aux quatre emplacements. Bien que le fumier se soit révélé comme le meilleur correctif pour rétablir la productivité du sol, son efficacité dépendait de la teneur en C organique du sol concerné. Pour un contenu en C organique de 8 g kg -1 de sol à l'emplacement en culture sèche de Lethbridge, l'apport de fumier entraînait un accroissement de rendement de 1,75 Mg ha -1 , contre seulement 0,27 Mg ha -1 pour un contenu en C organique de 15 g kg -1 . Nos observations viennent confirmer les avantages des pratiques préventives de conduite des sols destinées à réduire les risques d'érosion, maintenir la qualité du sol et conserver sa productivité. Mots clés:Qualité du sol, productivité du sol, érosion, fumier, terre de surface, blé Although prevention of soil erosion and enhancement of soil quality are cornerstones of sustainable agriculture, there is little quantitative information on the relationships between soil erosion, soil quality and soil productiv...

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“…Earlier studies have characterized the effect of soil quality attributes on productivity by sampling a number of points in a landscape and correlating yield with the specific soil properties of interest (Bruce et a!., 1990;Wright et a!., 1990;Bauer and Black, 1994). This approach has provided extensive information about soil quality-productivity relationships.…”

Section: General Approachmentioning

confidence: 99%

A Proposed Method for Measuring the Effect of Soil Quality on Productivity

et al. 1996

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The evaluation of soil quality requires definitive, measurable criteria. Our objective was to develop a field assay for identifying the specific soil attributes that govern the quality of soil for biomass production. The technique involved the removal of surface soil and subsequent deposition of soils with diverse attributes. As an initial evaluation of this approach, 36 diverse soils were deposited in a replicated design at each of two sites (dryland and irrigated), and the soils were seeded to cereals for three subsequent years. Crop growth was highly responsive to variation in soil properties. Dry matter yields on dryland in the year after establishment, for example, ranged from 5.4 to 9.4 Mg ha−1 (excluding two subsurface soils). These findings demonstrate that variation in soil quality has a quantifiable influence on productivity, and suggest a useful supplementary role for the proposed approach in identifying soil quality criteria.

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Soil Variables and Interactions Affecting Prediction of Crop Yield Pattern

Cited by 17 publications

References 0 publications

Effect of nitrogen fertilizer and landscape position on wild oat (Avena fatua) interference in spring wheat

Effect of nitrogen fertilizer and landscape position on wild oat (Avena fatua) interference in spring wheat

Soil quality and productivity responses to simulated erosion and restorative amendments

A Proposed Method for Measuring the Effect of Soil Quality on Productivity

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