Potassium and Drought: A Two-fold Water Uptake Problem

Potassium is back on the radar for many farmers and agronomists across the upper Midwest and northern Great Plains. In the past two weeks, corn growth and development have reached the stage where potassium deficiencies are becoming quite apparent, and widespread dry soil conditions during the 2021 drought have worsened the problem. In some instances, corn […]

Plant Sampling Basics – Sampling, storing, and shipping plant samples

Plant sampling season is in full swing. Agronomists submit plant samples for analysis for a number of reasons: to confirm visible nutrient deficiency symptoms, to detect “hidden hungers”, and to monitor or fine-tune fertilizer plans. For whatever reason you plan to take plant samples, here is a quick refresher on sampling, storing, and shipping plant samples to AGVISE Laboratories. Sampling […]

Is PI 88788 Working in Your Soybean Fields?

Soybean Cyst Nematode (SCN) is the number one yield-reducing pest in soybeans. Potential yield loss to SCN is expected to rise as more and more populations of SCN overcome the PI 88788 source of resistance. The Peking source of SCN resistance is not near as common as the PI 88788 source but is used in […]

Soybean cyst nematode: Failing resistance traits, increasing SCN populations

Originally featured in the Winter 2020-2021 AGVISE Laboratories Newsletter In 2019, AGVISE Laboratories investigated if popular soybean varieties with PI88788 or Peking SCN-resistance traits were effectively providing protection from soybean cyst nematode (SCN) and found that a number of the varieties failed to do so. We expanded the project in 2020 with cooperation from agronomists […]

Feed Nitrate Testing in a Drought Year

Drought is an unwelcome but well-known phenomenon on the Northern Plains and Canadian Prairies. Rainfall has been sparse and scattered across the region, and high temperatures exceeding 90 to 100° F (32 to 38° C) have already caused stress to young crops. These same stresses have also wracked pastures, prompting livestock producers to think about alternative feed options […]

Scouting Shorts: Soybean Iron Deficiency Chlorosis (IDC)

As soybean plants emerge and add trifoliate leaves, keep your eyes peeled for soybean iron deficiency chlorosis (IDC). Through the upper Midwest and into the Canadian Prairies, soils with high pH and calcium carbonate pose a special problem for soybean plants and iron uptake. If you encounter soybean IDC, you will start to notice soybean […]

Sidedress Corn Using the Pre-sidedress Soil Nitrate Test (PSNT)

As the corn crop begins to emerge, it is time to prepare for sidedress nitrogen applications. Sidedress nitrogen for corn can be applied any time after planting, but the target window is generally between growth stages V4 and V8, before rapid plant nitrogen uptake occurs. Split-applied nitrogen has become a standard practice in corn to reduce in-season nitrogen losses […]

How Much AMS Does Your Spray Water Need?

AGVISE Laboratories Spray Water Analysis Hard water is a fact of life for those of us in the northern Great Plains and Prairie Provinces. It is why our homes have water softeners, why our well water tastes funny (or delicious), and one reason we need to add AMS (ammonium sulfate) or UAN to our spray tanks to optimize weed […]

2021 Plant Nutrient Deficiency Troubleshooting Project

Plant analysis is a valuable tool for managing plant nutrients and troubleshooting agronomic problems. Being certain that a specific plant nutrient is causing deficiency symptoms is difficult with visual symptoms alone. Many causal agents unrelated to soil fertility can cause symptoms that appear to be nutrient-related. There are also some plant nutrient deficiencies that are impossible […]

Protect Nitrogen Fertilizer from Ammonia Volatilization

Recent rain and snow have brought much-needed precipitation to the northern Great Plains and upper Midwest regions. Some degree of drought conditions stretch from Alberta to Iowa, and agronomists and farmers are wondering the best ways to protect spring-applied nitrogen as the planting season continues. How much nitrogen might I lose if I cannot incorporate […]

Livestock Manure Sampling and Analysis

As you develop crop nutrition plans for the upcoming year, it is important to include spring manure application in the crop nutrition budget. Manure is an excellent source of plant-available nutrients and offers nice economic savings, especially with high fertilizer prices. When manure is applied properly, you can maximize the nutrient value, reduce nutrient losses, […]

Starter Fertilizer: Choosing the Right Rate

Starter fertilizer placed with or near the seed is essential for vigorous early season growth in grass crops such as corn and wheat. We plant these crops early because we know vigorous early season growth is important to achieving high crop yields. Early planting also means cold soils, and starter fertilizer is necessary to get […]

Preparing for Spring Soil Sampling

Even when fall soil sampling weather cooperates, there is always some soil sampling to do each spring. No matter the spring conditions, the soil sampling window is tight if you are planning to collect soil samples and get the soil test results back in time for spring fertilizer decisions. You will want to pull soil […]

Adjusting high soil pH and salinity with sugar beet-processing spent lime

The sugar beet processing industry uses large quantities of fine-ground, high-grade calcium carbonate (lime) to purify sucrose in the sugar extraction process. The by-product spent lime retains high reactivity and purity, making it an attractive liming material for acidic soils. Application of spent lime is a common practice through the sugar beet producing areas of […]

Soil Testing and 4R Nutrient Stewardship

Each year, farmers aim to increase agricultural production and profitability while conserving our land resources for the next generation. These tandem goals drive sustainable soil fertility and crop nutrition decisions on cropland across the world. In 2005, global fertilizer industry and environmental stakeholders began developing a standard theme to emphasize science-based stewardship in soil fertility […]