Search

Now showing items 1-10 of 11

Assessing soil K supply capacity for wheat growth

Qian, P.; Schoenau, J.J.; Greer, K.J.; Li, G. (1997-02-20)

Plant Root Simulators™: an efficient tool for in-field nutrient mapping

Greer, K.J.; Schoenau, J.J. (1995-02-23)

Characterizing soil phosphorus supply on aggrading and degrading management regimes

Greer, K.J.; Schoenau, J.J. (1994-02-24)

Practical concerns regarding P fertility usually focus on crop maturity and quality. However, on highly degraded soils P supply can be so low as to limit grain yield. A study of soils treated with conservation and conventional ...

Salinity and salt contamination assessment using anion-exchange resin membranes

Greer, K.J.; Schoenau, J.J. (1994-02-24)

Exchange resins have the ability to sorb ions directly from the soil solution and, thereby show promise as a method to assess plant available nutrients. In salt affected soils, knowing the relative levels of various anions ...

Soil organic matter content and nutrient turnover in thin Black Oxbow soils after intensive conservation management

Greer, K.J.; Schoenau, J.J. (1992-02-20)

Cultivation and frequent fallowing has a significant impact on soil organic matter (SOM) concentration and soil bulk density. Conservation tillage systems, such as direct seeding, minimize mixing and disturbance of the ...

Developing simplified synergistic relationships to model topsoil erosion and crop yield

Greer, K.J.; Hilliard, C.R.; Schoenau, J.J.; Anderson, D.W. (1992-02-20)

Topsoil is highly enriched with organic matter, which provides a valuable source of plant nutrients as well as a favorable rooting environment. Over time, erosion processes selectively remove the organic matter-rich fine ...

Interpreting potential plant availabitily of N based on soil supply indicies

Greer, K.J.; Schoenau, J.J.; Campbell, C.A. (1997-02-20)

Soil supply of nitrogen is the most intensively studied of all nutrient cycles. Prior to the widespread use of fertilizers, economically viable agriculture was dependent solely on the soils ability to supply N. From 1945 ...

Yield and uptake of N and S by canola and wheat in the growth chamber as influenced by N and S supply from soil and fertilizer

Qian, P.; Schoenau, J.J.; Greer, K.J.; Wu, W. (1995-02-23)

Simulated Productivity Lost by Erosion (SimPLE): model development, validation, and use

Greer, K.J.; Schoenau, J.J.; Anderson, W.; Hilliard, C.R. (1993-02-25)

Productivity lost due to soil erosion can be estimated by existing computer simulation models such as EPIC, NTRM and CENTURY. However, these models require extensive input data and, to date, have had limited success in ...

Factors affecting nutrient supply rate measurements with PRS™-probes

Sulewski, C.A.; Greer, K.J.; Schoenau, J.J.; Baron, V.S. (2002-02-20)

This poster includes background information about how PRS™-probes are used to measure soil nutrient supply rates and how factors of the soil environment influence nutrient supply rate measurements. The discussion contains ...