Many farmers have been attending winter meetings for update pesticide credits. Normally there are presentations on research data and new ideas for production measures. One common theme at the meetings I attended was for producers not to greatly reduce or eliminate fertilizer applications due to the high cost of the product.

It seemed that the general consensus was to reduce application rates no more than 10 percent. However, what makes a lot of sense this year is to also take a few soil tests. A Penn State soil test costs $9 and checks the soil pH, phosphorus, potassium, calcium and magnesium levels. You get a report back that recommends the amounts and types of lime and fertilizer, if needed, based on the crop being grown. These test kits can be purchased from the Farm Service Agency or your local Penn State Extension office. Following is some advice from Doug Beegle a Penn State Extension Soil Fertility Specialist.

If you hadn’t collected your soil samples last fall, which is the best time to do this, it is time to start thinking about soil sampling.

First, resist the urge to put off soil testing this year because of difficult economic times. You cannot afford to have your crop come up short because of lack of nutrients after you have made a significant investment in the many inputs required to put out the crop. At the same time you cannot afford to apply extra nutrients that will not give you an economic return.

The economics of soil testing are pretty simple. If you sample a 10-acre field every 3 years as recommended, the cost per acre is around 30 cents/acre per year. This small investment in soil testing results in recommendations used to manage typically $100 to 200 worth of nutrients on a crop probably worth $600 to $800/acre. You can’t risk this magnitude of input costs and potential returns on a guess.

Here are some guidelines for getting good samples:

n Sample uniform areas — Usually we sample each field individually. However, there may be times when we need to subdivide fields if there is the potential for significant differences across the field. Examples include: significant soil differences, part of the field receives manure but not the whole field, topographic differences such as low areas versus sidehills, etc. Also, there are situations when we can combine fields. For example when we have small strips that are all managed the same we can lump these together into one sample.

n Take lots of cores — At least 15 to 20 cores should be collected to make up a composite sample to send to the lab. More is better.

n Sample to uniform depth — For most routine soil testing, samples should be collected to plow depth, even in no-till or permanent sods. Inconsistent sampling depth is one of the biggest sources of errors in soil sampling. This is especially true in no-till and reduced tillage systems.

n Special note — In no-till fields an acid layer, called an acid roof, can develop right at the surface of the soil. This thin acid layer can have a significant impact on the crop but it can be missed in a normal plow depth sample. If the normal plow depth soil sample in no-till recommends liming, apply the lime as recommended and no further testing is needed. If the normal sample does not recommend lime and the field has been in long-term no-till and has not been limed recently, take a 2-inch deep sample and test it for pH. This sample can be submitted to a soil testing lab or you can use a field pH test kit. If this sample has a pH less than 6.2, then apply 1 ton of limestone even if the regular sample did not call for any limestone.

n Avoid atypical areas or sample them separately. Sample between the rows and avoid any fertilizer bands as much as possible. Also, many fields have known atypical areas such as dead furrows, old fence rows, lime or manure stacking areas, wet spots, etc. If the areas are too small to manage separately, do not sample them. If the areas are large enough that you are able and willing to manage them separately, then take a separate sample from these areas.

Handle the sample carefully. Collect the soil cores in a clean bucket so as not to contaminate it, crumble the sample cores and air dry the sample. Mix the cores thoroughly and take a subsample to fill the mailer to send to the lab.

n Fill out the soil test information sheet — Additional information such as the crop, the expected yield; the crop rotation, tillage depth, etc. are used along with the soil test results to make the recommendation. Thus, it is critical that the soil test information sheet be filled out completely and accurately.