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| Filter results2 paper(s) found. |
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1. Long-term Soil Profile Acidification: Obvious and Hidden DangersSoil acidification is occurring in the dryland farming region of the Northwest. Historically, soil acidification in the surface foot has been characterized; however, potential acidification of subsoil is unknown. We examined soil acidification for soil profiles (0 to 5 ft) at the R.J. Cook Agronomy Farm (92 ac) for 17 years following conversion from conventional tillage to continuous No-tillage (NT). Surface soil depths (0-12 in) acidified under continuous NT to below 5. Surprisingly, subsoil... D. Huggins, S. Shiwakoti |
2. Manganese Nutrition and Photosynthesis of ‘Pawnee’ PecanSouthwestern pecan (Carya illinoinensis) orchard soils are alkaline and calcareous which negatively affects manganese (Mn) availability for root uptake. Mn is essential for photosynthesis because of its roles in the photosystem II complex and chlorophyll biosynthesis. Levels of leaf Mn for optimum photosynthesis (Pn) in pecan is not known. Our objective was to characterize the relationship of widely different leaf tissue Mn concentrations on Pn. The experiment was conducted from 2011 through 2012... R. Heerema, J. Sherman |