Corn must have adequate amounts of nitrogen (N) and phosphorus (P) for profitable production. Nitrogen and phosphorus are also the nutrients that produce excessive algae growth in surface waters when concentrations increase above certain critical levels. Profitable and environmentally sensitive corn production requires that N and P be managed in an efficient manner. Economic returns from the use of these nutrients can be maximized, while the potential for surface and groundwater enrichment with N and P can be minimized with the use of appropriate technology. Available technology includes soil testing to evaluate residual soil nutrient supplies, and the use of proper application rates, methods, and timings.

No-tillage corn production has been practiced in Virginia for more than 35 years (Jones et al. 1968), yet many producers have not used no-tillage to its maximum advantage. This publication addresses where no-tillage corn can and should be adopted, and where no-tillage production needs to be modified to reduce production problems associated with continuous use.

Soil compaction is a manageable factor that can limit grain or silage yield on many Virginia soils.

Germination of wheat within the grain head before harvest is called pre-harvest sprouting (PHS). Periods of prolonged rainfall and high humidity after the grain has ripened and before it can be harvested can contribute to PHS, which can be thought of as a premature germination.

The 2023 Virginia performance trials of commercial corn hybrids were conducted at six locations: Blacksburg, Holland, Blackstone, Orange, Shenandoah, and Mt. Holly. Corn was planted with a Wintersteiger PlotKing 2600 planter, and harvested at maturity with a Massey-Ferguson 8XP plot combine harvester. Plot grain weights (lb/ac), grain test weight (lb/bu), at grain moisture (%) were measured with a GrainGage® by HarvestMaster. Plot grain weights have been adjusted to a standardized moisture content of 15.5%. Statistical analysis was done to determine what differences were significant.

This report presents results from barley and wheat trials conducted in Virginia in 2023-2024. In Virginia, small grain cultivar performance trials are conducted each year by the Virginia Tech School of Plant and Environmental Sciences and the Virginia Agricultural Experiment Station. The trials provide information to assist Virginia Cooperative Extension Service agents in formulating cultivar recommendations for small grain producers and to companies developing cultivars and/or marketing seed within the state. Yield data are reported for individual locations, and across locations and years. Performance of a given variety often varies widely over locations and years which makes multiple location-year averages a more reliable indication of expected performance than data from a single year or location. Details about management practices for barley and wheat are listed for each experiment location.