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Articles 1 - 3 of 3
Full-Text Articles in Agronomy and Crop Sciences
Effects Of Planting Date On Development Of Net Blotch Epidemics In Winter Barley In Pennsylvania, Leslie M. Delserone, H. Cole Jr.
Effects Of Planting Date On Development Of Net Blotch Epidemics In Winter Barley In Pennsylvania, Leslie M. Delserone, H. Cole Jr.
UNL Libraries: Faculty Publications
The influence of planting date on fall and spring net blotch epidemics (caused by Pyrenophora teres) was evaluated with the winter barley cultivar Pennrad. Experiments were conducted in Centre County, Pennsylvania, in 1982 and 1983 and in Lancaster County, Pennsylvania, in 1983. The three planting dates evaluated corresponded to the recommended date as well as dates I wk earlier and later than recommended for each specific location. Planting date had a significant influence on fall net blotch epidemics, with the greatest and least disease severities observed in the earliest and latest plantings, respectively. When spring environmental conditions were warm …
Application Of Urea Phosphate And Urea Sulfate To Drip-Irrigated Tomatoes Grown In Calcareous Soil, Robert Mikkelsen, Wesley Jarrell
Application Of Urea Phosphate And Urea Sulfate To Drip-Irrigated Tomatoes Grown In Calcareous Soil, Robert Mikkelsen, Wesley Jarrell
Robert Mikkelsen
The potential benefit of acid applied through drip urrigation on soil nutrient availability, plant nutrition, and yield was studied. Tomatoes (Lycopersicon esculentum Mill., cv. Better Boy) were grown in a P-deficient calcareous loam soil in 114-L plastic-lined cans. Phosphorus was added weekly through drip irrigation as urea phosphate (UP) (17-19-0) at four concentrations (0, 20, 40, 80 kg P/ha). Two other treatments entailed 40 kg P/ha soil-banded triple superphosphate (TSP) (0-20-0) with or without the addition of drip applied urea sulfate (US) (15-0-0-16). Urea sulfate was added at the rate equivalent to the titratable acidity of the 40 kg UP-P/ha …
Evaluation Of Repellent Seed Treatments And Effects On Early Corn Performance, Ann E. Koehler, Ron J. Johnson, Orvin C. Burnside, Stephen R. Lowry
Evaluation Of Repellent Seed Treatments And Effects On Early Corn Performance, Ann E. Koehler, Ron J. Johnson, Orvin C. Burnside, Stephen R. Lowry
Department of Agronomy and Horticulture: Faculty Publications
A combination of field, field enclosure, and germination chamber studies was used to evaluate the effects of methiocarb [3,5-dimethyl-4-(methylthio)phenol methylcarbamate] and thiram (tetramethylthiuram disulfide) repellent seed treatments on early corn performance. The thiram treatments used (0.08, 0.4,0.8,0.5,1.25, and 2.5% active ingredient by corn seed weight) had negligible effects on germination/emergence time or on com plant heights. The thiram treatments never reduced stand counts in comparison to controls, but apparently increased stand counts in some trials, particularly under wet conditions. The methiocarb treatments evaluated (0.5, 1.25, 2.5, and 5.0% active ingredient by corn seed weight) had only occasional effects on early …