Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"Preflood"”.
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The Effect of Preflood Nitrogen and Flood Establishment Timing on Rice Development, Nitrogen Uptake and Grain Yield
… delayed-flood production system. How long the preflood-N can be delayed without adverse effects on yield potential is poorly understood. The research objective was to determine the effects of preflood-N application and flood establishment timing on aboveground-N content, 50% heading, yield …
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The effects of dormant season burning and flooding on invasive cattail, Typha x glauca, on Rainy Lake and Lake Kabetogama in Northern Minnesota
… on historical record, so I took advantage of preflood data to examine how flooding alone affected <em>Typha</em> cover. Mean cover of <em>Typha</em> on floating mats was not significantly different from 2021 to 2022 (P>0.05). However, cover on <em>non</em>-floating mats dropped by 62.4% in …
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Methane Emissions and Ammonia Volatilization from Drill-Seeded, Delayed-Flood Rice on a Silt-Loam Soil in Arkansas
… grain yield of ammonia (NH3) volatilization from preflood urea application with and without the urease inhibitor N-(n-butyl) thiophosphoric triamide (NBPT). A chamber-based method was used to measure methane fluxes and linear interpolation and numerical integration between individual sample dates …
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Physiological and Morphological Responses of Nitrogen-Fixing Red Alder (Alnus Rubra) and Sitka Alder (Alnus Viridis Ssp. Sinuata) to Flooding: Inter- and Intraspecific Comparisons
… to maintain RS ratios similar to those under preflood conditions had greater flood tolerance. Seedling progeny showed consistently high variation in flood tolerance but little variation between wet and dry sites. Traits that confer tolerance to flooding within the red alder species appear to …
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Validation of N-STaR Nitrogen Rate Recommendations and Evaluation of N-STaR Soil Sampling Procedures for Clay Soils in Arkansas
… grain yield (RGY) N rates applied as a single preflood (SPF) and a 2-way split (2-WS) application to the SR. The N-STaR N-fertilizer rate recommendations were equal to or less than the SR at all locations with differences ranging from -224 to 0 kg N ha-1. At all 13 sites, rice receiving the …
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Rice Grain Yield and Nitrogen Uptake and Ammonia Volatilization from Urea as Affected by Urea Amendment and Simulated Rainfall
… of Urea-fertilized rice. Rainfall following preflood urea application appears to reduce NH3 loss but increase N loss via denitrification. Total-N loss was reduced when urea was treated with NBPT. Our second research objective was to compare the effects of simulated rainfall time and selected …