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Northwood Laboratory
804 Hwy 15 West
P.O. Box 510
Northwood, ND 58267
Phone: 701-587-6010
Fax: 701-587-6013
Benson Laboratory
902 13th Street North
P.O. Box 187
Benson, MN 56215
Phone: 320-843-4109
Fax: 320-843-2074
Canada Receiving Facility
380 Kimberly Road
Winkler, MB R6W 0H7
Phone: 701-587-6010
Quality Control is First Priority for AGVISE
in Quality Control/by John LeeWhen you receive a soil test report from AGVISE you should expect the best. Since our start in 1976, our first priority has been providing you with the most accurate soil test data. Ensuring proper quality control and quality assurance (QC/QA) takes extra care and dedication from everyone at AGVISE to provide you with the […]
AGVISE Potato Petiole Analysis: Informative, Accessible, and Easy-to-Understand Reports
in Nitrogen, Plant Analysis, Potato/by John LeeIrrigated potato production is an intensive cropping system. It requires proactive labor, critical decision-making tools, and well-timed nutrient management. There is a fine line between supplying adequate plant nutrition and applying too much, which could cause potato tuber defects like mishappen tubers or hollow heart, reducing the marketable potato yield. Before seed potatoes go in […]
Soil Science Review: Soil pH, Acidity, and Alkalinity
in Soil Chemical Analysis, Soil pH/by John BrekerSoil pH is a basic soil property that affects many biological and chemical processes in soil. Simply knowing if a soil is acidic or alkaline can tell us a lot about how it behaves and how we can manage it. This is why soil pH is often called the master variable of biological and chemical […]
Soil Science Review: Organic Matter
in Soil Chemical Analysis, Soil Health/by John BrekerSoil organic matter is a fundamental component of soil. It is comprised of living microorganisms, recently decomposed plant material, and stable humus organic compounds. Soil organic matter influences numerous biological, chemical, and physical properties of soil. It influences soil structure, water holding capacity, nutrient cycling, biological activity, and chemical fate and transport (e.g. pesticides). Soil […]
Phosphorus and the 4Rs: The progress we have made
in Fertilizer Placement, Phosphorus, Regional Data, Water Quality/by John BrekerThe year 2019 marked the 350th anniversary of discovering phosphorus, an element required for all life on Earth and an essential plant nutrient in crop production. Over the years, we have fallen in and out of love with phosphorus as a necessary crop input and an unwanted water pollutant. Through improved knowledge and technologies, we […]
Soil Science Review: Cation Exchange Capacity
in Soil Chemical Analysis/by John BrekerEach year, AGVISE Laboratories delivers thousands of soil characterization reports with something printed on them called, “Cation Exchange Capacity (CEC).” Unless you have some background in soil science or surface chemistry, the number might be a mystery to you. Cation exchange capacity is the amount of positive-charged cations (e.g. ammonium, calcium, hydrogen, magnesium, potassium, sodium) […]
Molybdenum: The Micro-est of Micronutrients
in Molybdenum, Plant Analysis, Soil Chemical Analysis, Soil pH/by John BrekerMolybdenum (Mo) is an essential plant nutrient, necessary for nitrate assimilation and biological nitrogen fixation. Legumes, relying on symbiotic nitrogen fixation, have greater Mo requirement than non-legumes. Nevertheless, the Mo requirement of plants is the lowest among all micronutrients, with critical deficiency concentrations ranging from 0.1 to 1.0 ppm in plant leaves. The very low […]
Fertilizing soybean
in Iron, Nitrogen, Phosphorus, Potassium, Soybean, Sulfur, Zinc/by Richard JennySoybean acres expanded greatly across the northern Great Plains and into Manitoba through the 1990s and 2000s. Today, soybean occupies a large portion of planted acres and makes a desirable rotation crop in canola, corn, and small grain production systems. As soybean has advanced northward and westward, soybean is often billed as a low maintenance […]
Copper for Small Grains
in Copper, Disease, Wheat/by John LeeAmong crops grown in the northern Great Plains, small grains (cereals) are the most susceptible to copper deficiency. Copper (Cu) is an essential micronutrient required in small concentrations for plant growth and reproduction. Copper deficiency symptoms in cereals include pale yellowing, wilted and twisted leaf tips, and malformed seed heads. Severe copper deficiency will stop […]
Caution: Ammonium Sulfate with Seed
in Canola, Fertilizer Placement, Phosphorus, Starter Fertilizer, Sulfur/by John LeeSeed-placed fertilizer is a common practice to increase seedling vigor and optimize fertilizer placement and crop response. This is a popular strategy to apply phosphorus for canola, corn, and wheat. However, the seed-placed fertilizer rate cannot exceed seed safety limits, otherwise seedling germination and plant population may be reduced. Sulfur is very important in canola […]
AGVISE Laboratories: Trusted by University and Industry Researchers
in Plant Analysis, Research, Soil Analysis/by John LeeWhile you may know AGVISE Laboratories for the soil and plant analysis services we provide you and your producers, AGVISE also has a long history of supporting university and industry research. For the past 30 years, many university-operated soil testing laboratories have closed in the region. This has left a gap in the on- and […]
5 Things You Should Know About Phosphorus
in Phosphorus, Regional Data, Soil Chemical Analysis/by John Lee1. The two accepted soil phosphorus tests in the North Central Region are the Olsen and Bray-P1 methods The Olsen (bicarbonate) method is the standard soil P test in the North Central region. This method was developed to work on soils with low and high pH. The Olsen method works well in precision soil sampling, […]
5 Things You Should Know About Calcium
in Base Cation Saturation Ratio, Calcium, Regional Data, Soil Chemical Analysis, Soil pH/by John Lee1. Calcium (Ca) is abundant in soils of the upper Midwest, northern Great Plains, and Canadian Prairies; calcium deficiency in agronomic crops is rare Calcium makes up about 3.6% of the Earth’s crust, and it is relatively abundant in agricultural soils across the region. In soils with pH greater than 6.0, Ca is the dominant […]
Soybean Iron Deficiency Chlorosis: Symptoms, Causes, and Management
in Iron, Soybean/by John BrekerIf soybean turns yellow during an early growth stage, you may have a case of soybean iron deficiency chlorosis (IDC). The distinctive yellow symptoms of soybean IDC often appear as soybean enters the first- to third-trifoliate leaf stage. Soybean IDC is characterized by distinct interveinal chlorosis (yellow leaf with green leaf veins) in the […]
Fallow Syndrome: Preventing Phosphorus Problems
in Canola, Cover Crop, Phosphorus, Prevented Planting, Soil Health, Starter Fertilizer, Sugar Beet/by Jodi BoeProducers in the northern Great Plains and upper Midwest need to consider the risk of fallow syndrome in their crop nutrition plans. You are probably asking, what is “fallow syndrome” and why should I care? After all, summer fallow is not that common anymore! But the greater number of Prevented Planting acres in 2019 and […]