Comments Off on Soil Testing for Making Fertilizer Rec’s
Can Soil Health Testing be Used for Making Fertilizer Rec’s?
The Haney test, designed to evaluate soil health indicators like soil respiration, water-soluble carbon and organic nitrogen was evaluated recently by University of Minnesota for generating corn fertilizer recommendations. Read the report here: http://b.link/c5dgy
Which Nitrogen Rate Prediction Tool is best for Corn?
The Economically Optimum Corn Nitrogen Rate (EONR) is a moving target, every season is a little or lot different and growers are left at doing an ‘educated guess’ at the most profitable rate. A researcher told me recently in reviewing 40 years of N rate research trials, the locally accepted PSNT recommendation could easily be off by +/- 30 lb N/ac in any one year. An article that appeared in Jan/Feb issue of Agronomy Journal shows that some Nitrogen prediction tools are getting closer to the mark. Researchers evaluated eleven Nitrogen fertilizer recommendation tools over 3 year period & 8 midwest US states for their ability to accurately estimate the EONR. None of the tools were able to recommend N within +/- 27 lbs. N of EONR for more than 50% of sites. Two of the most [...]
How is it that with the rapid adoption of new technologies on the farm for tracking everything and everyone, and sophisticated smart data collection, that soil testing, one of the most fundamental principles of good agronomy is still lagging in adoption in some farming areas? Farmers know that it is something that should be done regularly, but too often gets pushed down the to-do list. Great advancements in testing tools (eg. Wintex, electric conductivity) and lab testing methodologies have made it easier, more precise and with more detailed information. This blog came to mind when, not for the first time a farmer recently asked me about getting a soil health test, even though they could not remember the last time they had a soil tested for nutrients. Gosh!; have I/we really done that poor a job in communicating [...]
Midwest Cover Crop Decision Tool Midwestern states and Ontario are included, but we need growers and industry in other areas to push more provinces to join and contribute to make it a resource for everyone.
Great tool; regionally specific: b.link/fqjzl @CoverCropsMCCC
Historically, split applying N in wheat has not resulted in higher yields. However, some growers intentionally may delay applying part of their nitrogen until they have better idea of yield potential or as way to boost protein. Read more in this SaskWheat study : https://bit.ly/3dtZHXR
Results from a multi-state US split N study suggest that in only 24% of sites there was a benefit to split N. Ontario field trials indicated similar results. The greatest potential benefit was seen on soils more prone to N loss (sands & heavy clays). Read the full report from Ontario Grain Farmer: https://bit.ly/3dupT4F A multispectral red-edge or NDVI image at 8-12 leaf corn can help decide if a late N application is needed & create N management zones for application
Should you Apply Boron to Flowering Canola Canola and alfalfa are two field crops with the highest requirement for boron. Canola uptake is 0.3 – 0.5 lb/ac (60 bu/ac yield), alfalfa 0.3 lb/ac (4 t/ac yield) Tissue testing for boron can be useful as soil testing has not proved reliable. Organic matter usually supplies enough boron for most crops, perhaps except very low O.M., or coarse-textured soils. Boron assists in flowering, pollination, and aids in reducing flower blasting due to heat. Limited Ontario studies utilizing foliar boron at fungicide timing, show mixed results and indicate the best opportunity for payback is under dry weather with moderate crop stress. Read More: https://bit.ly/3eAY0JN Western Canada studies have generally not shown a response to soil or foliar Boron and caution about widespread use. One of the more recent foliar studies is by Sask Irrigation Crop Diversification Corporation: [...]
Tissue testing asks the crop ‘ What’s wrong’ and can be money well spent for growers to confirm a deficiency, or as a check if their crop needs more nutrients. In field crops, plant analysis providing a snapshot in time of nutrient uptake and most useful to indicate when nutrient levels are below critical levels. It can also help with evaluating fertilizer management practices, including potential micronutrient issues. Soil testing complements this information and indicates what is available and should accompany a tissue test. ISU offers updated P & K tissue testing guide for corn & soybeans: https://bit.ly/384f5ck
Remember to GPS sampling locations for post-harvest soil testing with your Wintex sampler
Do you have a favourite Plant Deficiency Symptom App ?
Recently we tested out a couple of phone apps for diagnosing crop deficiency symptoms look like, their function, what soils types are prone to this deficiency, and correction recommendations. The two we tested both have some good features, but left us somewhat disappointed. We only need one app. Ag Phd has a wide selection of crop kinds; Yara’s has a much more extensive image collection of nutrient deficiencies at different crop stages, and more agronomic information. Both miss the mark, with nothing for lentils, chickpeas, dry beans. Let us know what your favourite app and we’ll share this in our next newsletter. Email:firstname.lastname@example.org
Soil surveys conducted in a number of provinces across Canada are revealing a general decline in soil P and in potash. This has come as a surprise to many growers that have fertilized based on the ‘replacement approach’ of applying amounts of nutrients removed by the crop. Growers and agronomists also have questioned the sufficiency approach recommended by many government extension services. Rightly so, crop yields are much higher than when many of these fertility research trials were done. Then came the ah-ha moment.
Provincial sufficiency approach does not include an adjustment for current or expected yields. The sufficiency approach is based on many years of university research that produced yield response curves for P & K for various soil test levels (figure 1). Fertilizer recommendations were then based on the [...]
Since purchasing the Wintex1000 soil sampler this spring, it has made soil sampling much easier, efficient and more accurate. This year alone we have completed over 18,000 acres in sampling. The WINTEX 1000 is reliable and extremely user-friendly and requires minimal maintenance. All operations are easily carried out from the driver’s seat. I am very pleased with this new product.Randy - Accurate Agri Service
Our first Wintex 1000 soil probe was bought 4 years ago and this season it hit over 82000 holes on the counter. This unit is mounted inside a truck and work flawlessly. We pull the unit apart this year to see what parts we will have to replace to prevent down time. But we found that none of the wear plates needed to be replaced. The unit was still in perfect condition.Cavalier Agrow
"The Wintex soil sampler is a perfect fit for my John Deere Gator. It\\\\\\\'s capacity for soil samples per hour has allowed me to cut my sampling time in half. This system has enabled me to start site specific sampling while remaining cost-effective and improving my crops yields."Dustin Mulock
I recently talked with Felix and I told him how satisfy we are with the two Wintex 1000 we bought from Ag Business and Crop last year. We are looking for a high level of consistency in the depth of the soil sampling because this is key to deliver reliable soil tests analysis. We really can achieve this with our Wintex 1000. Furthermore, we can take so many more samples every day, which make our teams much more efficient.Pierre Pagé, GISP
We since bought a second unit which now also have Wintex 2000 samples on the counter and is also still in great shape. We are extremely happy with these units and will highly recommend them.Cavalier Agrow
I have several conversations with Felix regarding our Wintex3000 Soil Sampler, and he has been incredibly helpful along the way. He responds promptly and has answered all of our questions to the best of his abilities. He has also been very flexible with his availability. Thanks Felix!
The Wintex Soil Sampler is an easy-to-use, straightforward machine that alleviates the physical stress of collecting soil samples by hand. It has the ability to collect soil samples from multiple soil depths, and facilitates an efficient soil sampling process.Sylvis, Danica Long BSc