@article{butler_ranells_franklin_poore_green_2008, title={Runoff water quality from manured riparian grasslands with contrasting drainage and simulated grazing pressure}, volume={126}, ISSN={0167-8809}, url={http://dx.doi.org/10.1016/j.agee.2008.02.004}, DOI={10.1016/j.agee.2008.02.004}, abstractNote={Globally,management ofgrazedriparian areasiscriticallyimportanttoagriculturalsustainabilityandenvironmentalquality.However,the potential impacts of riparian grazing management on water quality are not well-documented, particularly in the southeastern USA. The objective of this work was to determine sediment and nutrient export under simulated rainfall from poorly drained and well-drained riparian soils where heavy or light grazing pressure by cattle was simulated. Plots were established on stands of existing vegetation to create grazing pressure treatments of (a) light-use (full ground cover, uncompacted), and with stands modified to establish (b) heavy-use (bare ground, compacted) treatments. Vegetation on poorly drained soils consisted of several typical wetland species (e.g., Pontederia cordata L., Juncus coriaceus Mackenzie) in the southeastern USA, whereas mixed tall fescue (Festuca arundinacea Schreb.)‐dallisgrass (Paspalum dilatatum Poir.) stands were the dominant vegetation on well-drained soils. Runoff volumewas generally greater from heavy-use than from light-use for poorly drained soils and for well-drained soils. Greater runoff volume was also observed from poorly drained soils compared to well-drained soils for both light-use and for heavy-use treatments. Light-use plots were remarkably effective at minimizing export of total suspended solids (TSS)onboth soils (<30 kg ha � 1 ). Mean total Kjeldahl P(TKP) exportwas fourfold greater from heavy-useplots than from light-use plots on both soils. While export of nitrate-nitrogen (NO3-N) was unaffected by grazing pressure and soil drainage, mean ammonium-nitrogen (NH4N) and total N (TN) export from poorly drained heavy-use plots was greater than fivefold that from well-drained light-use plots. Results indicate that livestock heavy-use areas in the riparian zone may export substantial TSS and nutrients, especially on poorly drained soils. However, when full ground cover is maintained on well-drained soils, TSS and nutrient losses may be limited. # 2008 Elsevier B.V. All rights reserved.}, number={3-4}, journal={Agriculture, Ecosystems & Environment}, publisher={Elsevier BV}, author={Butler, David M. and Ranells, Noah N. and Franklin, Dorcas H. and Poore, Matthew H. and Green, James T., Jr.}, year={2008}, month={Jul}, pages={250–260} }
 @article{iyyemperumal_green_israel_ranells_shi_2008, title={Soil chemical and microbiological properties in hay production systems: residual effects of contrasting N fertilization of swine lagoon effluent versus ammonium nitrate}, volume={44}, ISSN={["1432-0789"]}, DOI={10.1007/s00374-007-0221-y}, number={3}, journal={BIOLOGY AND FERTILITY OF SOILS}, author={Iyyemperumal, Kannan and Green, James, Jr. and Israel, Daniel W. and Ranells, Noah N. and Shi, Wei}, year={2008}, month={Feb}, pages={425–434} }
 @article{butler_ranells_franklin_poore_green_2007, title={Ground cover impacts on nitrogen export from manured riparian pasture}, volume={36}, ISSN={["0047-2425"]}, DOI={10.2134/jeq2006.0082}, abstractNote={ABSTRACT}, number={1}, journal={JOURNAL OF ENVIRONMENTAL QUALITY}, author={Butler, David M. and Ranells, Noah N. and Franklin, Dorcas H. and Poore, Matthew H. and Green, James T., Jr.}, year={2007}, pages={155–162} }
 @article{butler_franklin_ranells_poore_green_2006, title={Ground cover impacts on sediment and phosphorus export from manured riparian pasture}, volume={35}, DOI={10.2134/ieq2005.0351}, number={6}, journal={Journal of Environmental Quality}, author={Butler, D. M. and Franklin, D. H. and Ranells, N. N. and Poore, M. H. and Green, J. T.}, year={2006}, pages={2178–2185} }
 @article{reberg-horton_burton_danehower_ma_monks_murphy_ranells_williamson_creamer_2005, title={Changes over time in the allelochemical content of ten cultivars of rye (Secale cereale L.)}, volume={31}, ISSN={["1573-1561"]}, DOI={10.1007/s10886-005-0983-3}, abstractNote={Published studies focused on characterizing the allelopathy-based weed suppression by rye cover crop mulch have provided varying and inconsistent estimates of weed suppression. Studies were initiated to examine several factors that could influence the weed suppressiveness of rye: kill date, cultivar, and soil fertility. Ten cultivars of rye were planted with four rates of nitrogen fertilization, and tissue from each of these treatment combinations was harvested three times during the growing season. Concentrations of a known rye allelochemical DIBOA (2,4-dihydroxy-1,4-(2H)benzoxazine-3-one) were quantified from the harvested rye tissue using high performance liquid chromatography (HPLC). Phytotoxicity observed from aqueous extracts of the harvested rye tissue correlated with the levels of DIBOA recovered in harvested tissue. The amount of DIBOA in rye tissue varied depending on harvest date and rye cultivar, but was generally lower with all cultivars when rye was harvested later in the season. However, the late maturing variety 'Wheeler' retained greater concentrations of DIBOA in comparison to other rye cultivars when harvested later in the season. The decline in DIBOA concentrations as rye matures, and the fact that many rye cultivars mature at different rates may help explain why estimates of weed suppression from allelopathic agents in rye have varied so widely in the literature.}, number={1}, journal={JOURNAL OF CHEMICAL ECOLOGY}, publisher={Springer Nature}, author={Reberg-Horton, SC and Burton, JD and Danehower, DA and Ma, GY and Monks, DW and Murphy, JP and Ranells, NN and Williamson, JD and Creamer, NG}, year={2005}, month={Jan}, pages={179–193} }
 @article{osmond_ranells_hodges_hansard_xu_jones_pratt_2002, title={Tracking nitrogen loading reductions from agricultural sources: NLEW}, ISBN={1901502787}, journal={Climate variability and change : hydrological impacts}, publisher={Wallingford, Oxfordshire, UK : International Association of Hydrological Sciences}, author={Osmond, D. L. and Ranells, N. N. and Hodges, S. C. and Hansard, R. and Xu, L. and Jones, T. E. and Pratt, S. H.}, editor={Demuth, S. and Askew, A.Editors}, year={2002} }
 @article{wagger_cabrera_ranells_1998, title={Nitrogen and carbon cycling in relation to cover crop residue quality}, volume={53}, number={3}, journal={Journal of Soil & Water Conservation}, author={Wagger, M. G. and Cabrera, M. L. and Ranells, N. N.}, year={1998}, pages={214–218} }
 @article{ranells_wagger_1997, title={Grass-legume bicultures as winter annual cover crops}, volume={89}, ISSN={["0002-1962"]}, DOI={10.2134/agronj1997.00021962008900040019x}, abstractNote={Abstract}, number={4}, journal={AGRONOMY JOURNAL}, author={Ranells, NN and Wagger, MG}, year={1997}, pages={659–665} }
 @article{ranells_wagger_1997, title={Nitrogen-15 recovery and release by rye and crimson clover cover crops}, volume={61}, ISSN={["0361-5995"]}, DOI={10.2136/sssaj1997.03615995006100030033x}, abstractNote={Abstract}, number={3}, journal={SOIL SCIENCE SOCIETY OF AMERICA JOURNAL}, author={Ranells, NN and Wagger, MG}, year={1997}, pages={943–948} }
 @article{ranells_wagger_1997, title={Winter annual grass-legume bicultures for efficient nitrogen management in no-till corn}, volume={65}, ISSN={["0167-8809"]}, DOI={10.1016/S0167-8809(97)00054-6}, abstractNote={Winter annual cover crops may be an effective tool for managing inorganic N in the sandy soils of the Atlantic Coastal Plain when summer droughts can result in relatively high residual fertilizer N levels. A field experiment was conducted from 1992 to 1994 on a Norfolk loamy sand to determine the effect of (1) previous corn fertilizer N rate (150 or 300 kg ha−1) on dry matter (DM) and N accumulation in rye, crimson clover, and hairy vetch monocultures and respective rye-legume bicultures; (2) the respective cover crops on residual soil inorganic N levels; and (3) cover crops on corn grain yield. Compared to the preplant corn N rate of 150 kg ha−1, the 300 kg N ha−1 rate resulted in greater profile soil inorganic N contents on subsequent sampling dates in both years. Concomitant with these greater residual soil N levels were increases in cover crop DM and N accumulation compared with low residual soil N levels. Averaged over 2 year, cover crop DM accumulation by April was in the order of rye > rye-vetch = rye-crimson clover > hairy vetch > crimson clover. The corresponding cover crop N content ranking was hairy vetch > rye-hairy vetch > crimson clover = rye-crimson clover > rye. Before corn planting in Apr, rye monoculture reduced soil inorganic N content an average of 62% in 1993 and 37% in 1994 compared to legume monocultures. Soil inorganic N content under the rye-legume bicultures was reduced an average of 44% and 15% for the same dates. Inadequate rainfall during both corn growing seasons resulted in poor corn yields (1.18 to 2.50 Mg ha−1) that were generally unaffected by cover crop or prior N rate. The results from this study demonstrated the ability of rye and rye-legume bicultures to scavenge residual soil inorganic N following a summer corn crop, thereby minimizing the leaching of N from the plant rooting zone.}, number={1}, journal={AGRICULTURE ECOSYSTEMS & ENVIRONMENT}, author={Ranells, NN and Wagger, MG}, year={1997}, month={Oct}, pages={23–32} }
 @article{ranells_wagger_1993, title={CRIMSON CLOVER MANAGEMENT TO ENHANCE RESEEDING AND NO-TILL CORN GRAIN PRODUCTION}, volume={85}, ISSN={["1435-0645"]}, DOI={10.2134/agronj1993.00021962008500010014x}, abstractNote={Abstract}, number={1}, journal={AGRONOMY JOURNAL}, author={RANELLS, NN and WAGGER, MG}, year={1993}, pages={62–67} }
 @article{ranells_wagger_1993, title={CRIMSON CLOVER RESEEDING POTENTIAL AS AFFECTED BY S-TRIAZINE HERBICIDES}, volume={6}, ISSN={["0890-8524"]}, DOI={10.2134/jpa1993.0090}, abstractNote={Economic savings can result from allowing a crimson clover (Trifolium incarnatum L.) cover crop in no-tillage corn (Zea mays L.) systems to self-reseed and thereby eliminate the need for annual seeding operations. Research has indicated, however, that self-reseeding of crimson clover is variably sensitive to certain residual corn herbicides, depending on growth stage at time of herbicide application. Accordingly, a 2-yr experiment was conducted to evaluate the effects of atrazine, cyanazine, and simazine applied to crimson clover at four growth stages (late vegetative, early bloom, late bloom, and early seed set) on subsequent clover reseeding potential. All successfully reseeded crimson clover plots were sampled in 1990 and 1991 for dry matter (DM) and total N concentration []}, number={1}, journal={JOURNAL OF PRODUCTION AGRICULTURE}, author={RANELLS, NN and WAGGER, MG}, year={1993}, pages={90–93} }
 @article{ranells_wagger_1992, title={NITROGEN RELEASE FROM CRIMSON CLOVER IN RELATION TO PLANT-GROWTH STAGE AND COMPOSITION}, volume={84}, ISSN={["0002-1962"]}, DOI={10.2134/agronj1992.00021962008400030015x}, abstractNote={Abstract}, number={3}, journal={AGRONOMY JOURNAL}, author={RANELLS, NN and WAGGER, MG}, year={1992}, pages={424–430} }