In the last few weeks, some areas have received a considerable amount of rain, some would say excess rain. While all microbes live on water films in the soil, too much water changes the microbial community. Excess water also displaces oxygen in the soil which is detrimental to both certain types of microbes and also to plant health. Roots need to be able to absorb oxygen for respiration to break down the root sugars for energy. Oxygen is the fuel to making both fires burn hotter and also for plants and animals to burn oxygen and sugars to produce energy. In flooded soils, the majority of obligate aerobic microbes die within 24-72 hours. As dissolved oxygen is depleted; biological activity drops by 50% within 48 hours. Then facultative and obligate anaerobic organisms take over. Obligate means that either oxygen is totally required (obligate aerobes) or not required (obligate anaerobe). Aerobe mean oxygen loving, anaerobe means absence of oxygen. Facultative microbes may live in either ...

After a week of relatively good weather, farmers have mostly finished planting. Crops are starting to grow with the warmer weather but crops are quite variable. Having spent some time out West in the states of eastern Nebraska, Iowa, Missouri, Wisconsin, Illinois, Indiana, and even Texas; overall the crops look good. That is until you get about an hour west of Fort Wayne and into Northwestern Ohio along US Route 30; then unfortunately, the ground is soggy and crops are still struggling to emerge. Eastern Indiana, and Northwest Ohio had some good crops but many fields just recently got planted. Now forecasted weather reports are coming out saying that the USA has a 60-100% chance of a “Super El Nino” developing between May and July and lasting until the end of the year. In El Nino years, surface water in the eastern Pacific Ocean warms up and this causes extreme weather across the USA. In extreme Super El Nino years, the sea surface temperatures rise 2.5-3.00C or causes about a 4.5-5.40...

  A week of good weather finally is letting farmers either replant or finish planting. May weather was more like March and April weather while March and early April were warmer than normal. Some crops look good but many are still struggling and stands are quite variable. Wheat looks the best and likes cool wetter weather. Hay is finally started to get made. Now farmers are turning to spray spraying tweeds and get nitrogen (N) put on corn. With warmer weather, corn should start growing and have a better color. Microbial populations double with every 8-90F in soil temperature. This is good for getting nutrients into the plant and also in helping the plant with its N needs. For corn, N fertilizer prices are really high and corn prices are low, so putting on what N is needed and no more is the most economical. When N was cheap, the common rate was 1.2# of N per bushel of corn produced. So, for 200-bushel corn, a total N rate of 240# N was advised and for 250 bushel 300# N. With new cor...

A week of good weather is welcomed news as farmers finish planting and replanting. The past several weeks have been cold and wet and crop growth has been slow. Warm weather increases plant growth and warms up the microbes to release abundant nutrients. A number of agricultural pests including insects, pathogens, and weeds are now slowing down crop growth. On insects, seed corn maggot and wireworms are two of the worst Midwest seed insects. Cold, wet, soggy fields allow these insects to thrive. Seed corn maggots ( ) are pale larvae that burrow into and hollow out germinating seeds and young seedlings. Infestations cause poor crop stands, stunted growth, and plant death and are a problem in cool, soggy, and manured fields. Wireworm ( Melanotus communis Gyllenhal ) is the most common wireworm attacking corn and soybeans and is the larval form of the click beetle. Wireworms have a slender elongated body and are dark brownish orange. They have a distinct head and projecting mouthparts with...

  Spring is always a fickle thing when it comes to weather. Late March and April weather was more like May and May was more like April even March at times. The difference this year is cold, wet, and windy are common themes. Some farmers have a lot planted, some a fair amount planted, some for the first time. Others are already replanting. Although a week old, USDA's crop progress report is probably fairly accurate but behind for the weekend plantings. Estimates at that time were 34% of corn acres are planted in Ohio (much higher by now), with 20% of corn emerged. For soybeans, 34% of soybean acre were planted and 16% of soybeans emerged. Planted and emerged acres are probably much higher by now and warmer weather is expected. After a drought last year which lasted most of last fall and winter, most areas have recharged but that is highly variable. Along US 30, rain has been steady since March 10th with over 26 inches reported. Some areas North are less than half that amount. On cor...

  Several dairy farmers have been asking the question: Does improving soil health improve dairy cow health and dairy cow performance? Either higher milk yields, higher components, or just overall herd health? It’s a tough and complicated question to prove definitely, but the answer appears to trend in the direction of YES to all of the above. Milk is about 87% water and 13% solids. As it comes from the cow, the solid portion is about 3.7% fat and 9% solids not fat. Milk has fat soluble Vitamins A, D, E, K. The solids not fat portion is protein, carbohydrates (primarily lactose) and minerals including calcium and phosphorus. Milk is a good rich, dense food source especially for young growing children but also for older adults to avoid calcium deficiency. Researchers at Cornell University compared three fields, one unmanured and two that were manured at three different locations. The number of sites is low so our confidence in the data is rather limited. This was research conducted b...

  Seed imbibition is the process by which dry seeds absorb water, swell, and start germinating. A corn seed will absorb 30% of its weight in water while a soybean seed absorbs 50% water by weight to start germinating. Water moves into the seed coat, to the embryo, and the endosperm which greatly expands the seed and softens the seed coat. Soon radical roots start growing which are the first seed roots. For corn and soybeans, the soil temperature needs to be above 500F but 600F to 700F is much better. Seeds can take 18-20 days to germinate at 500F, but only 8-10 days at 600F and 1-5 days at 700F. This measurement is taken 2 inches deep in the soil. Generally, the soil temperature and moisture are a little more uniform when seeds are planted at least 2 inches deep or deeper. Corn can be planted 3 inches deep to get a more uniform emergence or at least down to moisture. Most areas have received adequate moisture this spring, but there are still areas with much less moisture due to thi...

Researchers at the USDA have identified a leading culprit for the massive honey bee die off.: Varroa mites harbor virulent virus that weaken and eventually kill honey bees. Varroa mites have become resistant to amitraz, the only remaining widely used miticide for hives. Amitraz was widely used, but no longer is considered effective at controlling Varroa mites in honey bee hives. The Varroa mite is an external parasitic mite that attacks and feeds on honey bees. The Varroa mite is one of the most damaging honey bee pests in the world. A significant mite infestation leads to the death of a honey bee colony or hive, starting in late autumn through early spring. Often hives become weak over the winter and the honey bee population in a hive is decimated by spring. Without management for Varroa mite, honey bee colonies typically collapse within 2 to 3 years in the USA. The Varroa mite can reproduce only in a honey bee colony. It attaches to the body of the bee and weakens the bee. The Varroa...

  Fast seed germination is critical to achieving high crop yields.  Cold wet weather often causes early crop stress that can be difficult for the plant to overcome and may cause long-term yield loss. Corn seed that germinates 3 days later than its neighbors is like a weed.  Fast seed emergence has many advantages.     First, the seed generally has enough energy to get the roots established and a leaf growing to capture the sun’s energy.  When seed roots emerge quickly though, there is less time for seed damage by insects, especially seed corn maggots, wireworms, and root worm larva.  Fast growing plants can outrun most slug damage or flea beetle which feast on sickly plants that are struggling to grow quickly.  Corn seeds provide nourishment for 7-14 days or until V3 while soybean its 7-10 days. New growing roots supplement seed nutrient reserves to improve plant growth, especially from micro-nutrients needed to speed up plant growth.  When s...

Carbon credits are still around and farmers should pay attention because it can be a profitable revenue stream. A carbon credit is a tradeable certificate for 1 metric ton of carbon dioxide removed from the atmosphere or recycled through sustainable farming practices. Farmers can sell these credits to companies as carbon offsets in voluntary markets. Practices like no-till farming, cover crops, and even using some biologicals increase carbon in the soil. For the farmer, getting paid to increase carbon or soil organic matter (SOM is 54% carbon) is a win-win proposition. Higher SOM increases yields and retains fertilizer nutrients and water for better crops. For farmers, up to 60% higher profit is possible by cutting back on fertilizer and still maintaining or even increasing crop quality and crop yields. Environmental benefits are also better. Less fertilizer used means less nutrient runoff and higher water quality. Improving SOM leads to less soil and wind erosion. For the consumer, t...

Pesticides (Herbicides, Insecticides, Miticides, Fungicides etc.) may affect soil microbes in many ways, often leading to reduced diversity and even lower populations of various soil microbes. Soil microbes are bacteria, fungi, archaea, protists, and viruses and account for an estimated 3%–4% of the total biomass on earth. Pesticides often degrade soil health and can lead to lower agricultural productivity or lower crop yields. Some pesticides change the soil structure so that soils become dense and compacted. Minimizing pesticide use is beneficial for improving soil health and microbial diversity and increasing soil microbial populations. Broad-spectrum herbicides are those that kill or control a wide variety of pests including weeds, fungi, and insects. Since they are so non-selective, they can kill or control beneficial microbes as well as both targeted and non-targeted organisms. Often broad-spectrum pesticides may also harm pollinators and beneficial predators. When this happens, ...

  Fertilizer generally enhance plant growth but it also may change soil microbial communities, leading to positive or negative changes. Chemical fertilizers are higher in salts (positive or negative ion charges). High salt content attracts water, ties it up, leading to both soil and plants becoming desiccated. If a nutrient is lacking, then fertilizer lets both microbes and the plant thrive. However, excess fertilizer generally leads to the opposite result. Also, chemical fertilizers tend to acidify or lower soil pH, generally disturb or change microbe diversity, and may lead to degraded soils. Organic fertilizers add more carbon and are commonly found in nature. They enhance soil microbial communities and soil fertility. They improve soil structure so that plant roots, water, and air move freely in the soil. They provide nutrients in a sustainable but slower time frame which enhances both microbes and plants, leading to more diversity and growth. However, sometimes for higher yiel...

  Jim Wiesemeyer (wiesemeyer@gmail.com), Washington DC agricultural insider, Virginia, spoke recently about US agriculture. Email him for free daily insights. Jim offered insights on E-15, Aviation fuel, and projections for the US Farm Bill. Jim is optimistic that Congress will pass a US ag farm provision for year-round E-15 Ethanol. While some Congress members are opposed, the majority want this legislation passed. The effect on corn markets may be slow though because it takes time to build new facilities for increased ethanol production. The aviation fuel (45Z) seems to be stalled. It is set to expire soon (2029) but no rules have been made. This would be a boon for USA agriculture if 45Z was a reality. It will stay stalled until a new farm bill is enacted. The 45Z Clean Fuel Production Credit provides a tax incentive for producing low-emission fuels including Sustainable Aviation fuel made from grain. Jim also reported on the USDA crop estimates. Currently the way USDA collects ...