University of Maryland Extension

Agricultural Nutrient Management Program

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Soil Tests from Various Labs

Q. My client had his soil samples analyzed at a lab that is not listed in NuMan Pro. What should I do? ( Posted June 6, 2003 ) A. Soil test results from some labs cannot be converted to the Maryland Fertility Index Value (FIV) scale if they were not part of the initial study or if they have unusual...

Responsibility for Correct Sampling Procedures

Q. Who is responsible in the case where the farmer takes the soil samples? ( Posted June 6, 2003 ) A. Ultimately the farmer is liable for both proper implementation of the plan, and if he has taken the samples, for the use of proper sampling techniques. ( Source: Louise Lawrence, Office of Resource...

Soil Sampling Depth

Q. How deep should I collect soil samples? The UME guidance says 8 inches (plow layer depth) but the labs that some of my clients use indicate different depths. ( Posted March 15, 2004 ) A. Collect soil samples to a depth of 8 inches ; this is consistent with the sampling depth guidance we have...

Soil Sampling after Nutrient Application

Q. Is it good practice to take soil samples on fields that have recently received organic or commercial fertilizer applications? ( Posted May 26, 2005 ) A. Sampling after manure or fertilizer application, especially in no-till or pasture situations, will make soil analyses highly variable and...

Arsenic Interference with P

Q. I have heard that arsenic mimics P in soil tests and can falsely elevate P levels in results. Is this true? ( Posted March 18, 2008 ) A. At one time the ascorbic acid-molybdate blue method was a popular choice for assessing P levels in soil samples. If samples were not specifically treated to...

Soil Sampling and Testing

Arsenic Interference with P Soil Sampling After Nutrient Application Soil Sampling Depth Responsibility for Correct Sampling Procedures Soil Tests from Various Labs Soil Sampling Requirements for Pasture

Turfgrass

Q. Where can I find information about nutrient recommendations for turfgrass? ( Posted June 6, 2003 ) A. Planners can find nutrient recommendations in the University of Maryland Turfgrass Technical Update, March 2003, TT-114 entitled "Nutrient Management Guidelines for Sod Production"...

Oats as Nurse Crop

Q. A client plants oats as a nurse crop for spring-seeded alfalfa. Should I use the alfalfa recommendations or the spring oats recommendations? ( Posted July 9, 2004 ) A. Emphasis should be placed on meeting the alfalfa's nutrient needs because as a perennial crop, it is a longer-term investment...

Christmas Trees

Q. Where can I find information about nutrient management plans for Christmas trees? ( Posted July 9, 2009 ) A. The NuMan Pro software contains pre-plant nutrient recommendations for Christmas trees (these recommendations are for the year in which the trees will be planted). For established trees,...

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