SR0080225 SSNL - Laserfiche WebLink

Home Browse Search

provides for a snug fit(close contact with the soil).Compact the soil at the surface around analysis needs to be compared to some base. The best "standard"to use would be the the top of the tube to avoid water channeling down the tube to the ceramic tip.Also,avoid tissue (petiole) analysis done by a lab and in conjunction with known agronomic facts installing in depressions, or low areas,which could retain standing water around the tube. concerning the particular crop and its nutrient uptake rate in relation to the amount of that Longer tubes can be used to sample from shorter depths to provide more vacuum capacity. nutrient in the soil water.This is not totally precise, but once you establish a correlation,or They can be installed at an angle to avoid having too much of the tube exposed above ratio,you have a guideline for future adjustments in the soil water/nutrient balance. ground to avoid possible accidental damage. If nothing else,once you establish this relationship,and look at a given soil water sample Sample Collection "reading,"you will be able to verify that you do not need to add more nitrogen,for example. The SSAT should have the vacuum applied when the soil is at or near field capacity(10- Further, by analyzing soil solution samples below the root system, you can verify deep 25 centibars of soil water suction). Vacuum is applied with the hand vacuum pump(#1002- percolation loss of nitrogen due to over-irrigation. SSAT) connected to the tubing with the finger clamp in the open position. Pump until the Summary vacuum is between 70 and 80 centibars on the pump gauge.Then close the finger clamp Soil solution sampling by a farmer is a convenient,inexpensive and valuable practice. It tightly on the tubing.Then the pump can be removed. allows for a much better informed management decision, which directly relates to crop The vacuum will draw soil water into the SSAT through the ceramic tip.How long it takes production. In most cases, it can result in significant cost savings on the fertilizer bill.And to collect a sufficient sample size depends on how wet the soil is near the tip and how much finally, it can help the farmer mitigate the deep percolation of nitrates into the ground water vacuum is applied to the tube.On a very short SSAT(6"to 12", 15 to 30 cm)the handheld supply that results from over-fertilization and over-irrigation. plastic syringe(#DS-50CC)can be used to place a partial vacuum,which can be sufficient in very moist soils. After sufficient time has passed to collect a significant volume of soil water(4 to 8 hours), the vacuum is released by opening the finger clamp.Twist the rubber stopper loose to make the sample easier to extract.Then connect the plastic extraction syringe(DS-50CC)to the WARRAWY; The IRROMETER COMPANY warrants its products against defective tubing by twisting it onto the end fitting and draw up on the syringe plunger to extract the soil workmanship or materials under normal use for one year from date of purchase.Defective solution for analysis. Between samples, it is important to rinse the syringe with distilled parts will be replaced at no charge for either labor or parts if returned to the manufacturer water to prevent carry-over contamination from sample to sample. during the warranty period. The sellers or manufacturers only obligation shall be to replace the defective part and neither seller nor manufacturer shall be liable for any injury, Field Analysis loss or damage,direct or consequential,arising out of the use of or inability to use the product. This warranty does not protect against abuse, shipping damage, neglect, Many nutrients as well as salinity (EC) can easily be measured with test kits tampering or vandalism,freezing or other damage whether intentionally or inadvertently (colorimeter), handheld meters or laboratory analysis. Some sources for such testing caused by the user. equipment are listed here: Hach Company—(970)669-3050 P.0. Box 389, Loveland,CO 80539 www.hach.com o «y r�wryatioro... Spectrum Technologies—815-436-4440 12360 S.Industrial Dr.East,Plainfield,IL 60544 wnrlclwrd�tucc�1951 www.specmeters.com Myron LCompang.—760-438-2021 I R R46M ETE Fr 2450 Impala Dr.,Carlsbad,CA 92010 1425 Palmyrita Ave., Riverside,CA 92507 www.myronl.com 951-682-9505 • FAx 951-682-9501 Measuring pH with suction extraction can be done successfully, however the pH of the techsupport@irrometer.com solution changes because some CO2 is lost due to the vacuum process.The loss can be www.[RROMETER.com calculated and thus compensated for during interpretation. Additional information is available upon request. Irrigation (9/ ) #728 In any event, analysis of the field sample cannot be done in a`Vacuum".The sample n� LITHO HO U.S.A. 8—Member –3 – –4 –