868 Articles found
Soil Science Society of America (SSSA) Articles
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Impacts of fertilization on water quality of a drained pine plantation: a worst case scenario
Received for publication December 8, 2008. Intensive plantation forestry will be increasingly important in the next 50 yr to meet the high demand for domestic wood in the United States. However, forest management practices can substantially ...
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Modifying broiler diets with phytase and vitamin d metabolite (25-OH D3): impact on phosphorus in litter, amended soils, and runoff
Received for publication April 14, 2009. Adding phytase and 25- hydroxycholecalciferol (25-OH D3) to broiler diets has been shown effective at reducing total P concentrations in broiler litter. This study was conducted to determine the impact of ...
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Transport and fate of phosphorus during and after manure spill simulations
Animal manure spills contribute to P loading of surface waters and little is known about the effectiveness of the current manure spill clean-up methods to mitigate P contamination. Manure spill clean-up consists of containing, removing, and land ...
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Leaching of three sulfonylurea herbicides during sprinkler irrigation
Sulfonylurea herbicides are widely applied on the Canadian prairies to control weeds in a variety of crops. Several sulfonylurea herbicides are mobile in soil, and there is concern about their possible movement to ground water. This study was ...
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Effect of compost-, sand-, or gypsum-amended waste foundry sands on turfgrass yield and nutrient content
Received for publication July 19, 2008. To prevent the 7 to 11 million metric tons of waste foundry sand (WFS) produced annually in the USA from entering landfills, current research is focused on the reuse of WFSs as soil amendments. The effects of ...
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Matrix-based fertilizers reduce nutrient and bacterial leaching after manure application in a greenhouse column study
Received for publication November 7, 2008. We tested the efficacy of matrix-based fertilizers (MBFs) to reduce Escherichia coli and Enterococcus spp., NH4, NO3, dissolved reactive phosphorus (DRP), and total phosphorus (TP) in leachate and soil ...
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Phosphorus distribution in untreated and composted solid fractions from slurry separation
Received for publication May 7, 2009. The distribution of phosphorus (P) (water-soluble inorganic P [Pi], acid-soluble Pi, and residual P) was determined in 40 samples of solids from solid–liquid separated slurry. These were collected from ...
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Enhancing undergraduate agro-ecological laboratory employment through experiential learning
We piloted an educational model, the Sustainable Agriculture Scholars Program, linking research in organic agriculture to experiential learning activities for summer undergraduate employees in 2007 and 2008. Our objectives were to: (1) further ...
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Exploring photosynthesis and plant stress using inexpensive chlorophyll fluorometers
Mastering the concept of photosynthesis is of critical importance to learning plant physiology and its applications, but seems to be one of the more challenging concepts in biology. This teaching challenge is no doubt compounded by the complexity by ...
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A culturally relevant agricultural and environmental course for K-12 teachers in Hawaii
A Hawaiian cultural-based agricultural and environmental science professional development course was transformed based on the precepts of situated learning in communities of practice, and offered to K-12 teachers. In this article we describe the ...
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Breeding maize for a bioeconomy: a literature survey examining harvest index and stover yield and their relationship to grain yield
The use of maize (Zea mays L.) stover as a feedstock for cellulosic biofuels production will create demand for maize hybrids with greater stover yield. It is expected that grain yield will remain the most critical trait and continue to drive hybrid ...
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Conserving and enhancing maize genetic resources as global public goods–a perspective from CIMMYT
The growing demands for food, feed, and bioenergy worldwide will require a 2% per annum increase in global maize (Zea mays L.) production. Maize is one of the most important staple food crops across the developing world as well as being an important ...
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Outcrossing in early-stage spring wheat breeder seed development
Outcrossing (OC) during the initial stages of spring wheat (Triticum aestivum L.) breeder seed development (`head-rowing`) may lead to off-types appearing in later generations of pedigreed seed. The objective of this research project was to measure ...
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Feasibility of seed production from nonflowering orchardgrass
Nonflowering or sparse flowering orchardgrass (Dactylis glomerata L.) would greatly simplify management of intensive rotational grazing systems. Our objective was to quantify seed production on nonflowering orchardgrass clones selected in ...
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Mapping quantitative trait loci for long coleoptile in Chinese wheat landrace wangshuibai
Wheat (Triticum aestivum L.) cultivars with long coleoptiles can be sown deeply for better seedling establishment in drought environments. A population of 139 recombinant inbred lines (RILs) from a cross between a long-coleoptile Chinese landrace, ...
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Climatic and genotypic effects for grain yield in maize under stress conditions
Climate change is expected to affect agriculture. Yield stability across environments is a critical breeding goal when dealing with unstable climate and input reductions in farming systems. The objective of this study was to determine climatic and ...
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Molecular mapping of wheat leaf rust resistance gene Lr42
Leaf rust, caused by Puccinia triticina Eriks., is an important foliar disease of wheat (Triticum aestivum L.) worldwide. Leaf rust resistance gene Lr42 from Aegilops tauschii Coss. has been used as a source of rust resistance in breeding programs. ...
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Genetic improvement of seedling emergence of low-phytate soybean lines
Reduced seedling emergence of low-phytate (LP) soybean [Glycine max (L.) Merr.] lines with the pha1 and pha2 alleles has been a limiting factor in the development of LP cultivars. Crosses between normal-phytate (NP) and LP soybean lines have ...
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Identification of novel QTL for sawfly resistance in wheat
The wheat stem sawfly (WSS) (Cephus cinctus Nort.) is an important pest of wheat (Triticum aestivum L. em. Thell.) in the Northern Great Plains. This paper reports the genetic analysis of antixenosis for egg-laying WSS females in recombinant inbred ...
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Vegetative phase change characteristics and resistance to common rust of corn cultivars developed in different eras
Since 1930, maize (Zea mays L.) yields in the United States have increased more than fourfold. Previous studies examining maize cultivars grown during that period have documented changes in yield, leaf angle, tassel size, drought tolerance, and ...