When To Apply Liquid Fertilizer To Corn
- November 2, 2021
If your fertilizer doesn’t produce more corn or decrease your expenses, it isn’t helping your business.It is this technology that allows AgroLiquid corn farmers to produce more corn with less fertilizer. .
Continuous or uniform stresses that affect plants equally often include cold or wet soil conditions or below optimum air temperatures.Sporadic or variable stresses in a field can be more detrimental to grain yield than continuous stresses. .
Severe nitrogen deficiency symptoms are evident in this field that remained saturated due to excessive rainfall.Because this N is applied well ahead of major crop uptake, it too is at risk of loss if warm soil temperatures and excessive rainfall occur.Depending on the time of application relative to planting, as well as expected weather conditions (determined by climate history) a nitrification inhibitor may also be advantageous.However, there are limits on how much N can be applied at planting, due to concerns over effects on seed germination, as well as how much material can be reasonably carried on the planter.If warm temperatures and moderate rainfall result in high N mineralization and an N-sufficient crop, sidedress rates can be reduced. .
Sweet Corn: Pollination & Fertilizer
Sweet Corn: Pollinating and Fertilizing.Hand pollination, however, is only required for very small plots of corn or if just one to three rows of corn are planted.How Corn is Pollinated.Each plant can self-pollinate.Pollen does not have to go from one plant’s tassel to a different plant’s silk.They also can pollinate from one plant to another.(See our how to choose the best sweet corn article to learn the importance of isolating plants to prevent cross-pollination of different varieties.).Silks - The sticky silks grow 2.5 to 4 centimeters (3/4 to 1 1/2 inches) per day in optimum conditions, starting at the base of the ear.After fertilization, the silks dry out and turn brown.In about 24 hours, you will know if your corn has been pollinated because the silks will begin to dry out and turn from white to brown.Fertilizing Sweet Corn for Best Growth.Before Planting Corn Seeds.Mulch helps conserve water in the soil and helps ensure consistent soil moisture levels that corn plants need.Fertilize the plants again when they are about 10 inches tall.Add nitrogen one last time once the sweet corn ears begin producing silk, using 46-0-0 nitrogen fertilizer according to product application directions.Unlike general all-purpose fertilizers such as a 15-15-15 product used on lawns, a 16-16-8 fertilizer has a higher level of nitrogen and phosphorus compared to potassium.P - Phosphorus (Phosphate) aids in plant maturity, supports the vigorous development of roots, stems, blossoms, and fruits.Organic Fertilizers.The best all-round organic fertilizer; should also be used with chemical fertilizers.Nitrogen, 6-9%; Phosphorus 2-3%; Potassium 1.5-2%.One of the best organic sources of nitrogen, aids growth of soil organisms.Nitrogen, 7-15%.Nitrogen, 0.6%; phosphorous, 0.15%; potassium, 0.55%; organic matter.Nitrogen, 2.5%; phosphorous, 0.25%; potassium, 1.5%; organic matter.Nitrogen, 0.7; phosphorous, 0.25%, potassium, 0.55%; organic matter.Nitrogen, 4.5%; phosphorous, 3.2%; potassium, 1.3%; low in organic matter.Nitrogen, 2.4%; phosphorous, 1.4%; potassium, 0.6%; organic matter.Nitrogen, 1-2%; phosphorous, 0.75%; potassium, 5%; organic matter.Nitrogen (N).Of all the major plant nutrients, Nitrogen is often the most important deciding factor in plant growth and crop yield.Good phosphorus levels ensure crops will reach their full potential for healthy development of fruit, flowers and seeds.Phosphorus helps to build plant vitality and is of special importance in developing strong root systems that ensures better resistance to root rot diseases.Potassium is a key nutrient in the plant’s tolerance to stresses such as cold-hot temperatures, improves resistance to pests and diseases and is essential for the development of fruits, flowers and seeds.Plants deficient in potassium often develop weak stem and stalks, small fruit and shriveled seeds, along with poor growth and yields.Now that you know pollination and fertilization, go back to our first article in this Guide to make sure you are growing the right variety for your conditions. .
Applying liquid nitrogen and herbicides on emerged corn
While UAN (urea-ammonium nitrate) liquid nitrogen and many pre-emergence herbicide products can be applied to emerged corn, using UAN as a herbicide carrier enhances the foliar activity of products and may result in foliar damage to the corn.Hartzler is an Iowa State University Extension weed management specialist and Sawyer is an ISU Extension soil fertility agronomist.UAN alone can be applied to emerged corn, and the risk of injury to the corn is dependent upon UAN rate, corn stage and weather conditions.N per acre when corn is at the V3 to V4 stage of growth and to 60 lbs.A team of plant pathologists from Iowa State University and Purdue University answer that question and provide their explanation in the current issue of ISU Extension's Integrated Crop Management newsletter.The article is written by Daren Mueller, ISU Extension soybean plant pathologist and assistant professor in ISU's Department of Plant Pathology. .
Enhanced Efficiency Liquid Nitrogen Fertilizer Management for Corn
Field research was conducted from 2011 to 2013 in Northeast Missouri to determine corn yield, plant population, and grain quality response to N application timings (fall vs. spring) and five N sources/placements at two different N rates (84 and 168 kg·N·ha−1) on a poorly drained claypan soil.Deep UAN with a fall N application produced the highest grain yield (8.12 to 9.12 Mg·ha−1) at 84 and 168 kg·N·ha−1, but it was less effective with a spring application in 2011.Fall deep AA produced the lowest grain yields (5.97 and 6.8 Mg·ha−1) in 2013 at 84 and 168 kg·N·ha−1 potentially due to wet soil conditions at the time of application.However, a study in Kansas reported no differences in corn grain yield between a fall and spring pre-plant N application .Since soils are generally below 10°C and lower rainfall occurs during fall on claypan soils of Northeast Missouri, corn response to N fertilizer application timings (fall vs.
spring) needs to be evaluated.Benefits of NT depend on many factors including seasonal weather conditions and management practices such as N fertilizer timing, source, N placement, soil moisture content, soil temperature, and overall seedbed conditions in the spring [22, 23].The objective of this study was to determine the effects of two N application timings (fall vs. spring preplant) and five N sources/placements on corn yield, plant population, and grain quality in a poorly drained claypan soil.The cumulative precipitation during the growing season of all three years was at least 25% lower than the 10-year average.Average soil temperature over the growing season from 2000 to 2009 was 19.7°C.Similarly, surface UAN and surface NF had greater corn plant heights on 30 June than deep UAN and NF treatments at 84·kg·N·ha−1 (Figure 2(a)).The NT systems may have cooler, wetter seedbed conditions  and can have reduced corn plant heights when combined with a surface N application due to greater N loss .N source placement Chlorophyll meter readings Corn plant population Corn grain parameters Yield Moisture Protein Oil 2011 2012 2013 2011 2012 2013 2011 2012 2013 F S F S F S F S SPAD units No.For example, 2013 was relatively wet early in the growing season and these conditions may have affected spring-applied deep AA at 68 kg·N·ha−1 compared to fall-applied.Plant populations for fall-applied N at 84 kg·N·ha−1 in the deep UAN and deep NF treatments were 16 and 14% higher than spring-applied N, respectively (Table 4).When N was applied at 168 kg·N·ha−1 in the fall, deep NF had plant populations that were 15,650 plants·ha−1 greater than spring-applied N (Table 5).Although there were no significant differences between N timings among the other N source/placement treatments, fall-applied N at 84 kg·N·ha−1 had higher plant populations (350 to 4,100 plants·ha−1) for surface UAN, surface NF, and deep AA treatments compared to spring N application.Plant populations were 800 to 9,700 plants·ha−1 higher with fall-applied N at 168 kg·ha−1 in treatments other than deep NF compared to spring-applied N (Table 5).Both N rates increased plant population for deep NF when N was fall-applied.Deep NF was applied with ST which may have improved seedbed conditions more effectively compared to those of NT treatments [21, 43].Corn Grain Yield.Corn grain yields were observed to have a significant three-way interaction ( ) between the timing of N application, source/placement, and year at 84 kg·N·ha−1 (Table 3).In 2011, deep UAN had 1.11 to 1.42 Mg·ha−1 greater corn grain yield than all of the N sources/placements with fall N application (Table 4).Spring application of deep UAN had 4.21 Mg·ha−1 lower corn grain yields in 2011 compared to fall-applied deep UAN.Fall N application for all N treatments resulted in 0.93 to 4.21 Mg·ha−1 greater corn grain yields in 2011 compared to spring-applied N. Regardless of N timing, the severe drought in 2012 (NAOO, 2013) resulted in average corn grain yields of 1.9 Mg·ha−1 which were 4.1 Mg·ha−1 lower compared to those in 2011 and 2013.Corn grain yields were similar among sources/placements and timings in 2012.In 2013, deep UAN and deep NF showed no significant differences in corn grain yield when N was applied in the fall or spring.Spring application of surface NF in 2013 had the highest corn grain yield (7.75 Mg·ha−1) and produced at least 0.17 Mg·ha−1 more grain yield among the spring-applied N treatments.Corn grain yield in 2013 with deep AA was 1.61 Mg·ha−1 (27%) greater with spring N application compared to fall application (Table 4).A significant three-way interaction ( ) between the timing of N application, source/placement, and the year was detected for corn grain yield at 168 kg·N·ha−1 (Table 3).In 2011, fall-applied deep UAN, surface NF, deep NF, and deep AA resulted in 3.6, 1.18, 2.41, and 2.70 Mg·ha−1 higher corn grain yield than an equivalent spring N application, respectively (Table 5).Since higher corn grain yields with fall N application were observed in 2011 for both 84 and 168 kg·N·ha−1, we can summarize that greater N loss was probably attributed to spring application, while NT/surface broadcast and ST/deep banded treatments were able to effectively minimize the potential for denitrification loss over the fall, winter, and early spring periods.Furthermore, corn grain yields in 2011 at 168 kg·N·ha−1 with spring N application of surface UAN and surface NF had at least a 1.75 and 1.02 Mg·ha−1 higher corn grain yield than deep AA treatment, respectively.This was similar at 84 kg·N·ha−1, where surface UAN and surface NF in the spring had at least 0.98 Mg·ha−1 higher corn grain yields in 2011 than deep UAN, NF, and AA treatments.The spring application of surface NF at 168 kg·N·ha−1 in 2013 had the highest corn grain yield among spring- or fall-applied N sources/placements.Although not significant, the surface NF treatment applied in the spring at 168 kg·N·ha−1 produced 0.67 Mg·ha−1 higher grain yield compared to a fall application in 2013 (Table 5).This was potentially due to higher soil temperatures during 2013 and greater cumulative rainfall in May (Figure 1(c)).Relatively high rainfall in April 2013 delayed planting to May, thus potentially causing fall surface NF to be less effective, and has a greater risk of N loss before planting.Although the study did not assess different N timings, the research was still similar because cumulative rainfall was greater in May (252 mm) at this particular Nebraska location compared to other sites in the experiment.This is similar to a 3-year study done in Minnesota that observed an average increase of 0.8 Mg·ha−1 in corn grain yield with AA applied in the spring compared to fall application .High corn grain yields in 2013 with spring N application of deep AA may have been due to an increase in microbial activity from warmer soil conditions in May.Corn grain moisture concentration had a significant interaction between N source/placement and N timing ( ) when averaged across years at 84 kg·N·ha−1 (Table 3).Deep UAN had higher corn grain moisture with spring N application than fall N application at 84 kg·N·ha−1 (Table 6).Conversely, surface NF and deep AA had 17 and 16 g·kg−1 higher corn grain moisture with fall N application compared to spring N application at 84 kg·N·ha−1, respectively.Deep UAN in the spring had corn grain moisture of 223 g·kg−1 which was 25% more than the deep UAN treatment in fall at 84 g·kg−1 (Table 6).At 168 kg·N·ha−1, corn grain moisture was different among N sources/placements ( ) regardless of N timing and year (Tables 3 and 5).Deep NF (207 g·kg−1) and deep AA (215 g·kg−1) at 168 kg·N·ha−1 had at least 17 g·kg−1 greater moisture concentration than all other N sources/placements (Table 5).Deep NF in 2013 had the lowest grain protein concentration (66.1 g·kg−1) than all N source placements in the three years (Table 6).Protein concentration in corn grain also had a significant interaction between N sources/placements and year ( ) at 168 kg·N·ha−1 (Tables 3 and 5).Surface UAN in 2013 had a lower grain protein concentration (75.9 g·kg−1) than all N sources/placements in the three years of this research, but it was similar to deep AA in 2013 and surface UAN (77.8 g·kg−1) or surface NF (77.5 g·kg−1) in 2011 (Table 5).Combining N source placements across the three years at 168 kg·N·ha−1 indicated higher grain oil concentration with the fall application (32.7 g·kg−1) compared to a spring application (31.7 g·kg−1) (Table 7).Over this three-year study, the application of strip-till deep banded UAN in the fall before the 2011 growing season resulted in the highest corn grain yield (8.12 to 9.12 Mg·ha−1) at both 84 and 168 kg·N·ha−1.This indicates greater N loss was attributed to spring application in 2011 due to cooler soil conditions and extended periods of soil saturation early in the growing season.Spring N application showed an increase in corn grain yield in 2013 among treatments compared to 2011, which may have been due to warmer and wetter soil conditions in May.This study suggests that ST with deep banding UAN or AA does not always produce higher corn grain yield during drought years and might be more at risk for greater N loss under certain climatic conditions.On a poorly drained claypan soil, farmers may need to consider fall N applications since corn grain yield was generally greater than or equal to spring-applied treatments at both rates.
How and When to Fertilize Your Vegetable Garden
Apply fertilizer with caution, though: The only thing worse than starving a plant of nutrients is to accidentally overfertilize it.For edible crops, fertilizer is usually applied in the spring and mixed into the garden soil before planting.This ensures that there is less of a chance of the tender new growth brought about by the fertilizer getting immediately killed by frost.While a spring application is a good general rule, understand that what plants really need is help when they are growing the most.This occurs earlier for spring plantings of lettuce, arugula, kale , and other leafy greens .Tomatoes and potatoes will need extra fertilizer mid-season as the plants take up and use existing nutrients.Ornamental trees, shrubs, and perennials are often fertilized at the beginning of their growing season, as dormancy breaks.You may even find that if your garden has been fertilized for years, you have high levels of nutrients.These three numbers refer to the three most important nutrients plants need: Nitrogen (N), Phosphorus (P), and Potassium (K).If you add up the numbers, they are the percentage of the bag’s total weight (the rest is simply filler to make it easy to apply).For tomatoes, we use a separate fertlize with a 3-4-6 ration which also contains calcium to help prevent blossom-end rot.Vegetable crops require most of their nitrogen after they have made considerable growth or have already begun to fruit.Later in the season, some plants benefit from a nitrogen side dressings (sprinkled in middle of rows).Sweet corn can benefit when plants are 8 to 10 inches tall and then one week after tassels appear.These vegetables should NOT have added nitrogen: sweet potatoes, watermelons, carrots, beets, turnips, parsnips, lettuce.Processed fertilizers (also called “synthetic” or “chemical” fertilizers) are manufactured from natural ingredients such as phosphate rock (P) and sodium chloride (NaCl) and potassium chloride ( KC l) salts, but these are refined to be made more concentrated.Organic fertilizers are materials derived from plants that slowly release nutrients as the micro-organisms in the soil break down.(Plus, they don’t leach into and pollute waterways, as do many of the synthetic, water-soluble fertilizers, which plants can’t fully absorb.).While most organic fertilizers are slow-release products, some release a portion of their nutrients quickly (examples are animal manure, biosolids, and fish emulsion).During the growing season, lighter supplemental applications can be made to the top inch of soil in crop rows and perennial beds and around the drip lines of trees or shrubs.No matter how carefully you remove plants from their containers and place them in the ground, some root hairs will break.The fertilizer will reach the roots immediately and enter them at the broken points, potentially “burning” them and causing further die-back.If you have more questions about fertilizers, please ask below, or we encourage gardeners to call their country’s free cooperative extension office for local advice.Visit our complete Gardening for Everyone hub, where you’ll find a series of guides—all free! .
Liquid Fertilizers, Starters, and Nutrients
This means that each drop of liquid fertilizer contains the exact same amount and ratio of crop nutrients for the intended growing plant.With many dry fertilizers, it is nearly impossible to combine the specific nutrients needed for diversified row crops.When various nutrients are combined in liquid fertilizers, you save time and labor costs by reducing the number of application trips.For growers that use planters equipped to apply fluid starter 2×2—or on the surface and 2 inches to the side of the seed row—Liqui-Grow manufactures a line of high-quality, clear-green products.These analyses are made from high-polyphosphate 10-34-0, soluble potassium chloride, supplemental Nitrogen (UAN solution), sulfur, and zinc.Urea – Ammonium Nitrate solution (UAN), 32% N, is the principle source of all supplemental nitrogen, whether it is added to suspension in the fall, applied in early spring, used as a carrier for herbicides, as a weed and feed fertilizer before or after planting, or as a post emergence application.Side-dress application of fertilizer analysis such as 20-0-4-2(S) makes sense when the uptake of plant nutrients has been reduced due to excessive moisture or compaction.The Liqui-Grow product line utilizes fluid suspension fertilizer grades to meet required maintenance or build-up applications of phosphorous and potassium.Our Liqui-Grow fertilizer formulae not only provides the crop nutrients found in NPK, but also the micronutrients that ensures your plants are getting the best diet they can.Our liquid fertilizer is enriched with boron, copper, and zinc, which are important elements to keep your plants growing strong and healthy. .