|Biochar in Agricultural Systems||Aug 20, 2010||442-311|
|Fertilizer Types and Calculating Application Rates||Aug 4, 2009||424-035|
|Fertilizing Cool-Season Forages with Poultry Litter versus Commercial Fertilizer||
The Shenandoah Valley of Virginia and some other regions produce more manure nutrients than local crops need. This manure has traditionally been applied to row crops and overapplication has led to soil-test phosphorus (P) being well above agronomic optimum in many cases. In 2008, it was estimated that nutrient-management regulations now require that approximately 85 percent of poultry litter be applied off poultry farms, as they do not have sufficient land to beneficially recycle their manure nutrients. There is a substantial area of nutrient-deficient forage production in the Shenandoah Valley that could benefit from this poultry litter. This publication summarizes two years of field research on fertilizing nutrient-deficient forages with poultry or commercial fertilizer. It also evaluates split versus single annual applications of nutrients and addresses a common misconception that poultry litter contains weed seeds.
|Sep 16, 2009||418-142|
|Impact of Changing From Nitrogen- to Phosphorus-Based Manure Nutrient Management Plans||
Animal manures are a good source of nitrogen (N) and phosphorus (P) for agricultural crops, but they have an imbalance in their N to P ratio, so that if they are applied to meet crop N needs, then P is overapplied. For many years, manures have been applied to meet crop N needs, which has resulted in some soils containing more P than crops require, leading to environmental concerns. Regulations have been developed to limit P losses from manures and soils high in P by moving manure nutrient management from an N basis to a P basis.
|Sep 16, 2009||442-310|
|Importance of Farm Phosphorus Mass Balance and Management Options||
Phosphorus is a naturally occurring element that is one of 16 elements essential for plant growth and animal health. Research has documented that applying phosphorus in fertilizers or manure increases crop growth and yield on soils that are below critical agronomic levels, as measured during routine soil testing. Although the economic benefits of phosphorus fertilization on crop production are well-documented, too much of a good thing can be detrimental to the environment. Excessive soil phosphorus is a potential threat to water quality.
|Dec 19, 2014||CSES-98P|
|Laboratory Procedures: Virginia Tech Soil Testing Laboratory||May 1, 2009||452-881|
|Manure Injection in No-Till and Pasture Systems||Feb 27, 2013||CSES-22P|
|Nitrogen Management for White Potato Production||
One of the challenges of white potato production, as with any crop, is the efficient management of nitrogen
|Sep 28, 2009||438-012|
|Nutrient Management for Small Farms||Oct 8, 2010||442-305|
|Soil Test Note #1 - Explanation of Soil Tests||May 1, 2009||452-701|
|Soil Test Note #2 - Field Crops||
Most Virginia soils are acidic and require lime applications at three- to five-year intervals. Maintaining the correct soil pH has several benefits, such as encouraging healthy root development and making sure nutrients in the soil are available to the plant. For example, low pH can cause aluminum toxicity and can decrease phosphorus availability.
|Sep 25, 2014||452-702 (CSES-100P)|
|Soil Test Note 5: Fertilizing With Manures||Aug 19, 2009||452-705|
|Soil Test Note No.3 - Liming and Fertilization of Cool-Season Forage Crops||Aug 28, 2012||452-703 (CSES-16P)|
|Virginia No-Till Fact Sheet Series Number Three: Manure Injection||Nov 16, 2010||3011-1517|