Our laboratory utilizes a nitric/perchloric acid digestion, which we believe gives us a more complete digestion than many other laboratories that utilize hydrogen peroxide/nitric digestions. We have tested multiple methods including microwave digestion but we remain convinced that the perchloric acid allows for a more complete digestion of organic matrix's especially those with high lignin and calcium content.
Nitrogen Analysis for plant tissue is done using the Leco 928 Series analyizer (pictured). We also have multiple Elementar Nitrogen Analyzers that along with the Leco 928 are capable of Total Carbon and Total Nitrogen determinations. These combustion analyzers are considered the standard for plant tissue nitrogen analysis. The nitric/perchloric acid digestions are performed with specialized fume hoods that pull the fumes away and scrub them with water to prevent salts accumulation. The Final nutrient analysis is done with Inductively Coupled Plasma Spectorophotometry (ICP-OES).
Our laboratory typically has sample results available within 48 hours or two business days from the receipt of the sample at our lab. However, there are times when sample volume is extremely high or if we have scheduled maintenance on equipment, that turn around times may be 72 hours or longer. It is RARE that we exceed more than 5 business days on sample turnaround time. If you have not received your samples within this time frame then you should call the lab as something may wrong. PLEASE REMEMBER Saturday and Sunday are not business days...although our lab typically remains open on Saturdays during busy times. We do offer a 24 or 48 hour Assurance Program for those who are interested. There is additional fees associated with the assurance programs. Please see pricing information below for details.
We provide free shipping labels via UPS. We also provide sampling supplies (bags), and boxes. To qualify for free shipping each box must contain a minimum of 15 soil samples. FOR UPS GROUND: If a box contains less than 10 samples then shipping fees will be incurred by the client. FOR UPS NEXT DAY AIR: if a box contains less than 20 samples, shipping fees will be incurred by the client.
Some crops, where we have done extensive research, there are established critical and optimal levels by week of growth, GDU, or growth stage. On these crops it allows growers to tissue sample often (usually weekly) and track the crop nutrients relative to the optimal levels or critical levels for each week of growth. The reports are accumulated each week and a chart is displayed that shows the relative values. The Standard analysis is a traditional low, sufficient, high, very high method based on established growth stages.
All samples are dried overnight in forced air ovens with temps not to exceed 170 degrees F. After drying, samples are ground to pass a 1.0-mm screen (20 mesh) using a Wiley Mill. Samples are then weighed and transferred to flasks and combined with the nitric/perchloric solution. Samples are digested and reconstituted with an HCL solution. Samples are filtered into test tubes and then analyzed via ICP instrumentation.
Total Nitrogen (N%), Phosphorus (P%), Potassium (K%), Magnesium(Mg%), Calcium (Ca%), Sulfur (S%), Boron (B-ppm), Zinc (Zn-ppm), Fe (Fe-ppm), Copper (Cu-ppm). Sufficiency Levels and Recommendations where available.
Standard Plant Analysis + Aluminum (Al-ppm)
Standard Plant Analysis + Aluminum (Al-ppm) & Molybdenum (Mo-ppm)
Fe, Al, Si, and Mn are affected by dust particles. Foliar nutrient spray and fungicide residues can affect several elements. The decontamination process must be thorough while still preserving sample integrity. Therefore, decontamination procedures involving washing and rinsing should only be used for fresh, fully-turgid plant samples. 0.1 to 0.3% detergent solution (non-phosphate) are used when requested.
$0 to $5/sample depending #shipped
For standard UPS ground shipping is free when 10 or more samples are shipped. Each sample less than 10 is charged $2 per sample until 10 is reached. For UPS Next Day Air shipping is free when 20 or more samples are shipped. Each sample less than 20 are charged $5 per sample until 20 samples reached. Example 16 samples shipped Next Day Air would result in $20 total in additional shipping fees.
$2 for 48 hour priority or $4 for 24 hour priorty
For the times when your samples need to be bumped ahead of others that may not have as urgent needs for results we offer a priority option. This option is not a guarantee that your samples will be ready within 24 hours but it will move them to the front of the line. The fee is $2 for 48 hour priority or $4 for 24 hour priority.
$12 (in addition to sample cost)
This is for emergency situation where growers absolutely have to have their results within 24 hour of the time they arrive at the lab. We guarantee these results and if not produced within the time frame then the sample is free. The guarantee adds $12 to the cost of each sample.