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Evaluation Of Corn Response To In-Season Potassium Fertilization Using Dry Fertilizer, D. A. Charbonnier, D. A. Ruiz Diaz
Evaluation Of Corn Response To In-Season Potassium Fertilization Using Dry Fertilizer, D. A. Charbonnier, D. A. Ruiz Diaz
Kansas Agricultural Experiment Station Research Reports
In-season application of potassium (K) fertilizer may offer an alternative to remediate deficiencies developed during the growing season. The objective of this study was to determine corn response to topdress K application under deficient K soil conditions. Treatments included a control and 50 lb K2O/a in-season broadcasted at the V8 growth stage. The fertilizer source was potassium chloride (KCl). Measurements collected were plant biomass and tissue nutrient concentration at reproductive stage (R6), and grain yield. Potassium fertilization increased yield at the location evaluated in this study. The in-season fertilized treatment produced higher yield compared to the control (P<0.09). The late K fertilization had higher K concentration and uptake in the plant at R6 (P<0.06) with the same plant biomass as the control treatment. Also, broadcasting KCl at V8 resulted in a higher K/Mg ratio late in the season (R6). Preliminary results of this study suggest that in-season applications using dry K fertilizers could be used when pre-plant fertilization was not done. Nevertheless, for a dry growing season, corn response might be limited.
Comparison Of Static And Active Downforce On Corn At The Kansas River Valley Experiment Field In 2020, E. A. Adee
Comparison Of Static And Active Downforce On Corn At The Kansas River Valley Experiment Field In 2020, E. A. Adee
Kansas Agricultural Experiment Station Research Reports
Uniformity of plant spacing and emergence have been shown to be significant contributing factors to increasing corn yields. Improved seed meters that offer very precise seed drop have been available on planters for a number of years. However, uniformity in plant emergence continues to be a challenge, especially with reduction of tillage and in fields with variable soils. Correct, consistent depth is critical for uniform corn emergence. By keeping the gauge wheels on the ground, consistent depth is achieved. An active downforce system, such as Precision Planting’s DeltaForce, applies hydraulic downforce or lift to the row unit. With a Precision …
Kansas Field Research 2021
Kansas Agricultural Experiment Station Research Reports
A summary of research conducted in 2019-2020 on field production and management practices for crops in Kansas. Published in 2021 from the Kansas State University Agricultural Experiment Station and Cooperative Extension Service https://www.ag.k-state.edu/
Crop Production 2020 – Corn, Sorghum, Soybean, And Sunflower Variety Testing, G. F. Sassenrath, L. Mengarelli, J. Lingenfelser, X. Lin
Crop Production 2020 – Corn, Sorghum, Soybean, And Sunflower Variety Testing, G. F. Sassenrath, L. Mengarelli, J. Lingenfelser, X. Lin
Kansas Agricultural Experiment Station Research Reports
This is a summary of the variety testing for corn, sorghum, soybean, and sunflower. Nine corn varieties were tested in 2020, with an average yield of 107.6 bu/a. Twenty-four cultivars of soybeans from maturity groups (MG) 3-4 and twenty-seven cultivars from MG4-5 were tested in both full-season and double-cropped management. Full-season beans yielded an average of 54.5 bu/a for MG3-4 and 58.8 bu/a for MG4-5, which was greater than the average yields in the double-cropped beans at 32 bu/a for MG3-4 and 40.5 bu/a for MG4-5. The state-wide average soybean yield in 2020 was higher than the 10-year average. Nine …
Alternative Cropping Systems With Limited Irrigation, A. Schlegel, D. Bond
Alternative Cropping Systems With Limited Irrigation, A. Schlegel, D. Bond
Kansas Agricultural Experiment Station Research Reports
A limited irrigation study involving four cropping systems and evaluating four crop rotations was initiated at the Southwest Research-Extension Center near Tribune, KS, in 2012. The cropping systems were two annual systems (continuous corn and continuous grain sorghum) and two 2-year systems (corn-grain sorghum and corn-winter wheat). In 2020, corn yields were similar for all rotations, although averaged across the past 8 years, corn yields were greater following wheat than following corn. There were no significant differences in grain sorghum yields in 2020, which was similar to the multi-year average. Wheat yields were below the multi-year average.
Effect Of Late Planting Dates On Corn Yield, E. A. Adee
Effect Of Late Planting Dates On Corn Yield, E. A. Adee
Kansas Agricultural Experiment Station Research Reports
Planting date studies have been conducted for corn over many years. Often the focus has been to determine optimum planting date for maximizing yield. In some areas, planting early-maturing corn hybrids as early as possible has been a successful strategy for avoiding hot, dry conditions at the critical pollination and early grain fill stages. Planting later can be an alternative strategy that attempts to avoid the most intense heat by moving the critical growth stages for corn centered around pollination to later in the growing season. This strategy has been adopted by some growers in areas that often encounter heat …
Corn Tiller Yield Contributions And Ear Development In Low Plant Densities, R. Veenstra, C. D. Messina, D. Berning, S. Wallace, M. Legleiter, L. Haag, P. V. Prasad, I. A. Ciampitti
Corn Tiller Yield Contributions And Ear Development In Low Plant Densities, R. Veenstra, C. D. Messina, D. Berning, S. Wallace, M. Legleiter, L. Haag, P. V. Prasad, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
Research in modern corn (Zea maysL.) hybrids investigating tiller contributions and ear development at low plant densities is scarce, particularly in water-limited environments. To fill this research gap, a second season of replicated experiments was conducted in 2020 at 7 sites across Kansas (Keats, Buhler, Greensburg, Garden City, Goodland, and two sites in Colby) evaluating two common, tiller-prone corn hybrids (P0805AM and P0657AM) at three target plant density levels (10000, 17000, and 24000 plants/a). Five of the listed sites also considered a tillering factor (tiller removal at development stage V10 [tenth-leaf] or tiller maintenance). Seasonal phenology, partitioned grain …
Large-Scale Dryland Cropping Systems, A. Schlegel, L. Haag, A. Burnett
Large-Scale Dryland Cropping Systems, A. Schlegel, L. Haag, A. Burnett
Kansas Agricultural Experiment Station Research Reports
This study was conducted from 2008–2020 at the Kansas State University Southwest Research-Extension Center near Tribune, KS. The purpose of the study was to identify whether more intensive cropping systems can enhance and stabilize production in rainfed cropping systems to optimize economic crop production, more efficiently capture and utilize scarce precipitation, and maintain or enhance soil resources and environmental quality. The crop rotations evaluated were continuous grain sorghum (SS), wheat-fallow (WF), wheat-corn-fallow (WCF), wheat-sorghum-fallow (WSF), wheat-corn-sorghum-fallow (WCSF), and wheat-sorghum-corn-fallow (WSCF). All rotations were grown using no-tillage (NT) practices except for WF, which was grown using reduced-tillage. The efficiency of precipitation …
Impact And Liberty Rates And Mixtures For Efficacy In Corn, R. S. Currie, P. W. Geier
Impact And Liberty Rates And Mixtures For Efficacy In Corn, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
The objective of the study was to compare Impact (topramezone), Liberty (glufosinate) and a premixture of the two herbicides (Sinate) for efficacy in corn. Rates for each herbicide were 0.75 and 1.0 oz/a for Impact, 22 and 30 oz/a for Liberty, and 21 and 28 oz/a for Sinate. Impact and Sinate, each at the high rates, and Status plus glyphosate provided the best kochia control for corn late in the season. These treatments, along with the low rate of Impact controlled crabgrass the best. Status was also the best treatment for Russian thistle, Palmer amaranth, and green foxtail control. The …
Outlook Alone And In Mixtures For Efficacy In Corn, R. S. Currie, P. W. Geier
Outlook Alone And In Mixtures For Efficacy In Corn, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
The objective of the study was to compare Outlook (dimethenamid) alone and in various tank mixtures for season-long weed control in corn. Kochia control with most herbicides was 95% or more late in the season. However, Russian thistle control did not exceed 83% with any herbicide tested. Palmer amaranth control at 59 days after the postemergence treatments was similar among all herbicides, while green foxtail control was 93% or more with each treatment. All herbicides increased grain yields relative to the untreated control, but corn treated with Outlook or Verdict alone yielded less grain than the best yielding plots.
Kansas Fertilizer Research 2021
Kansas Fertilizer Research 2021
Kansas Agricultural Experiment Station Research Reports
A summary of research conducted in 2018-2020 on fertilizer use and management practices for crops in Kansas. Published in 2021 from the Kansas State University Agricultural Experiment Station and Cooperative Extension Servicehttps://www.ag.k-state.edu/
Tiller Contributions To Low-Density Corn Biomass And Yield, R. Veenstra, C. Messina, L. Haag, P. V. Vara Prasad, I. A. Ciampitti
Tiller Contributions To Low-Density Corn Biomass And Yield, R. Veenstra, C. Messina, L. Haag, P. V. Vara Prasad, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
Tillers (commonly termed “suckers”) have lower overall yield contributions in corn (Zea maysL.) than in other Poaceae species. Current research evaluating the value of tillers in corn is scarce, particularly under water-limited conditions. This study aims to quantify relationships between tiller, main plant, and full (considering both tiller and main plant fractions) plant aboveground biomass and yields of corn under low plant density scenarios. Experiments were conducted in the 2019 growing season at three sites across Kansas (Garden City, Goodland, and Manhattan) evaluating two tiller-prone corn hybrids common in this region (P0805AM and P0657AM) at two plant densities …
Corn Yield Response To Nitrogen In North-Central Kansas, A. A. Correndo, I. A. Ciampitti
Corn Yield Response To Nitrogen In North-Central Kansas, A. A. Correndo, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
The aim of this study was to evaluate the response of corn (Zea maysL.) grain yield to nitrogen (N) fertilizer. During the 2019 cropping season, an N rate experiment in corn was established in Scandia, KS, evaluating five N fertilizer rates as UAN (28-0-0) under both dryland and irrigated conditions. Average yields ranged from 138 to 236 bu/a under rainfed and from 153 to 249 bu/a for irrigated conditions. Under both dryland and irrigated conditions, maximum yields were achieved with an N rate of about 161 lb/a. Total N supply was calculated as N at planting plus fertilizer …
Tillage Study For Corn And Soybeans: Comparing Vertical, Deep, And No-Tillage, E. A. Adee
Tillage Study For Corn And Soybeans: Comparing Vertical, Deep, And No-Tillage, E. A. Adee
Kansas Agricultural Experiment Station Research Reports
Trends from a tillage study conducted since 2011 have shown no clear differences between tillage systems for either corn or soybeans in lighter soils under irrigation. One year out of seven years has shown a yield advantage for either corn or soybeans for any tillage system, which appears to be related to environmental conditions experienced during the season. Averaged across all years of the study, the treatments with deep tillage either every or every-other year had about 3% higher corn yields, and soybeans had up to a 3% yield increase with some form of tillage.
Water Use And Productivity Of Corn And Grain Sorghum In Long-Term Crop Sequences, R. M. Aiken
Water Use And Productivity Of Corn And Grain Sorghum In Long-Term Crop Sequences, R. M. Aiken
Kansas Agricultural Experiment Station Research Reports
Dryland corn and grain sorghum showed similar water productivity of grain and above-ground biomass, relative to respective growing periods, at the apparent yield frontier. The yield frontier indicates the maximum productivity for a given amount of water use. This similarity in productive response to water supply provides a foundation for improved precipitation use. Yield gaps relative to the yield frontier appear substantial. Water supply during the grain filling period was the primary driver of feed grain crop productivity, and was affected more by available soil water at pollen shed than by precipitation during grain-fill or available water at maturity. Grain …
Influence Of Particle Size Of Enogen Feed High Amylase And Conventional Yellow Dent Corn On Finishing Pig Performance, Carcass Characteristics, And Stomach Ulceration, H. R. Williams, M. D. Tokach, J. C. Woodworth, R. D. Goodband, J. M. Derouchey, S. S. Dritz, V. Shivanna, C. B. Paulk, H. I. Calderón
Influence Of Particle Size Of Enogen Feed High Amylase And Conventional Yellow Dent Corn On Finishing Pig Performance, Carcass Characteristics, And Stomach Ulceration, H. R. Williams, M. D. Tokach, J. C. Woodworth, R. D. Goodband, J. M. Derouchey, S. S. Dritz, V. Shivanna, C. B. Paulk, H. I. Calderón
Kansas Agricultural Experiment Station Research Reports
A total of 323 pigs (DNA 241 × 600; initially 109.8 lb) were used in an 83-d growth trial to evaluate the influence of particle size of Enogen Feed corn (Enogen, Syngenta Seeds, LLC, Downers Grove, IL) and conventional yellow dent corn on finishing pig performance. Pigs were randomly assigned to pens (9 pigs per pen) and pens were allotted by weight to 1 of 6 dietary treatments in a randomized complete block design with 6 pens per treatment. Treatments were arranged in a 2 × 3 factorial with main effects of corn source (Enogen Feed corn or conventional yellow …
Fertilizer Source And Rate Affect Sulfur Uptake And Yield Response In Corn, T. E. Husa, D. A. Ruiz Diaz
Fertilizer Source And Rate Affect Sulfur Uptake And Yield Response In Corn, T. E. Husa, D. A. Ruiz Diaz
Kansas Agricultural Experiment Station Research Reports
With sulfur deficiencies being found throughout Kansas, the evaluation of sulfur fertilization and plant uptake are vital to optimize corn production. The objective of this study was to evaluate the effect of application rates of sulfur on yield and uptake in corn. Nutrient concentrations in corn biomass and grain were evaluated at the Kansas River Valley Experiment Field at Rossville, KS, in 2019. Five treatments were evaluated, including a control with no sulfur and no nitrogen (N), and four fertilizer treatments with 180 lb of nitrogen and four rates of sulfur fertilizer (0, 30, 50, and 200 lb S/a). The …
Soil Phosphorus Fractions After Long-Term Fertilizer Placement In Different Kansas Soils, M. J. Coelho, D. A. Ruiz Diaz
Soil Phosphorus Fractions After Long-Term Fertilizer Placement In Different Kansas Soils, M. J. Coelho, D. A. Ruiz Diaz
Kansas Agricultural Experiment Station Research Reports
Phosphorus (P) fertilizer placement can affect the long-term dynamics and forms of P, and the overall soil P pools. These changes can vary by soil type, and affect P uptake and use efficiency by crops. The objective of this study was to evaluate the changes in the labile P fractions in three Kansas soil types under P fertilizer placements (broadcast versus deep band) after ten years of crop rotation. Three field studies were conducted at Scandia, Ottawa, and Manhattan. Three treatments were evaluated: 1) a control with no P fertilizer application and two fertilizer treatments (80 lb P2O …
Pre-Plant Nitrogen Rate And Application Method And Side-Dress Nitrogen Rate Effects On No-Till Corn Grown On A Claypan Soil, D. W. Sweeney, D. Ruiz Diaz
Pre-Plant Nitrogen Rate And Application Method And Side-Dress Nitrogen Rate Effects On No-Till Corn Grown On A Claypan Soil, D. W. Sweeney, D. Ruiz Diaz
Kansas Agricultural Experiment Station Research Reports
Average corn yield in 2019 was increased by 14 bu/a with knife application of pre-plant nitrogen (N) fertilizer compared with broadcast application. Applying N more than doubled yield of corn grown without N. In general, applying side-dress N increased yields compared to yields obtained with only pre-plant applications.
Southeast Kansas Crop Production Summary - 2019, G. F. Sassenrath, L. Mengarelli, J. Lingenfelser, X. Lin, E. Adee
Southeast Kansas Crop Production Summary - 2019, G. F. Sassenrath, L. Mengarelli, J. Lingenfelser, X. Lin, E. Adee
Kansas Agricultural Experiment Station Research Reports
This is a summary of the crop production conditions in southeast Kansas in 2019, and the results of the variety testing for corn, soybean, sorghum, sunflower, and wheat.
Alternative Cropping Systems With Limited Irrigation, A. Schlegel, H. D. Bond
Alternative Cropping Systems With Limited Irrigation, A. Schlegel, H. D. Bond
Kansas Agricultural Experiment Station Research Reports
A limited irrigation study involving four cropping systems and evaluating four crop rotations was initiated in 2012 at the Southwest Research-Extension Center near Tribune, KS. The cropping systems were two annual systems (continuous corn [C-C] and continuous grain sorghum [GS-GS]) and two 2-year systems (corn-grain sorghum [C-GS] and corn-winter wheat [C-W]). In 2019, corn yields were similar for all rotations, although averaged across the past 7 years, corn yields were greater following wheat than following corn. There were no significant differences in grain sorghum yields in 2019, which was similar to the multi-year average. Wheat yields were greater than the …
Influence Of Particle Size Of Enogen Feed High Amylase And Conventional Yellow Dent Corn On Nursery Pig Performance, H. R. Williams, H. R. Kerkaert, M. D. Tokach, J. C. Woodworth, R. D. Goodband, J. M. Derouchey, S. S. Dritz, C. B. Paulk, H. I. Calderón
Influence Of Particle Size Of Enogen Feed High Amylase And Conventional Yellow Dent Corn On Nursery Pig Performance, H. R. Williams, H. R. Kerkaert, M. D. Tokach, J. C. Woodworth, R. D. Goodband, J. M. Derouchey, S. S. Dritz, C. B. Paulk, H. I. Calderón
Kansas Agricultural Experiment Station Research Reports
A total of 360 pigs (DNA 200 × 400; initially 14.5 lb) were used in a 35-d growth trial to evaluate the influence of particle size of Enogen Feed high amylase (Enogen, Syngenta Seeds, LLC, Downers Grove, IL) and conventional yellow dent corn on nursery pig performance. Pigs were randomly assigned to pens (5 pigs per pen) and pens were allotted by weight to 1 of 6 dietary treatments in a randomized complete block design with 12 pens per treatment. Treatments were arranged in a 2 × 3 factorial with main effects of corn source (high amylase or conventional yellow …
Timing Of Side-Dress Applications Of Nitrogen For Corn In Conventional And No-Till Systems, D. W. Sweeney, D. Ruiz Diaz
Timing Of Side-Dress Applications Of Nitrogen For Corn In Conventional And No-Till Systems, D. W. Sweeney, D. Ruiz Diaz
Kansas Agricultural Experiment Station Research Reports
Corn yield and yield components were affected by tillage and nitrogen (N) side-dress application options in 2019. Average corn yields were 15% greater with conventional tillage than with no-till. Yields were improved by either splitting N rate between pre-plant and side-dress at the V10 growth stage or adding additional side-dress N as compared with applying 150 lb/a pre-plant.
Kansas Fertilizer Research 2020, D. A. Ruiz Diaz
Kansas Fertilizer Research 2020, D. A. Ruiz Diaz
Kansas Agricultural Experiment Station Research Reports
A summary of research conducted in 2018-2020 on fertilizer use and management practices for crops in Kansas. Published in 2020 from the Kansas State University Agricultural Experiment Station and Cooperative Extension Servicehttps://www.ag.k-state.edu/.
Dynamics Of Post-Flowering Nitrogen Uptake And Nitrogen Recovery Efficiency Using 15n Isotope Labeling In Corn, J. A. Fernandez, J. B. Nippert, I. A. Ciampitti
Dynamics Of Post-Flowering Nitrogen Uptake And Nitrogen Recovery Efficiency Using 15n Isotope Labeling In Corn, J. A. Fernandez, J. B. Nippert, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
In corn (Zea maysL.), breeding and selection for grain yield over time has been accompanied by a simultaneous increase in plant nitrogen (N) uptake. The understanding of plant N dynamics has attracted attention due to the environmental concerns related to N losses coming from fertilization. This research study was implemented to 1) describe N uptake and allocation dynamics, and 2) quantify fertilizer recovery efficiency across late-N strategies. Two field experiments (one under irrigation and one rainfed) were conducted at the Ashland Bottoms Research Farm, KS, during 2017. Three hybrids with different year of release and three N scenarios …
Large-Scale Dryland Cropping Systems, A. Schlegel, L. Haag, A. Burnett
Large-Scale Dryland Cropping Systems, A. Schlegel, L. Haag, A. Burnett
Kansas Agricultural Experiment Station Research Reports
This study was conducted from 2008–2019 at the Kansas State University Southwest Research- Extension Center near Tribune, KS. The purpose of the study was to identify whether more intensive cropping systems can enhance and stabilize production in rainfed cropping systems to optimize economic crop production, more efficiently capture and utilize scarce precipitation, and maintain or enhance soil resources and environmental quality. The crop rotations evaluated were continuous grain sorghum (SS), wheat-fallow (WF), wheat-corn-fallow (WCF), wheat-sorghum-fallow (WSF), wheat-corn-sorghum-fallow (WCSF), and wheat-sorghum-corn-fallow (WSCF). All rotations were grown using no-tillage practices except for WF, which was grown using reduced-tillage. The efficiency of precipitation …
Influence Of Enogen Feed Corn And Conventional Yellow Dent Corn In Pelleted- Or Meal-Based Diets On Finishing Pig Performance And Carcass Characteristics, H. R. Williams, M. D. Tokach, J. C. Woodworth, R. D. Goodband, J. M. Derouchey, S. S. Dritz, C. B. Paulk, H. K. Wecker, H. I. Calderón
Influence Of Enogen Feed Corn And Conventional Yellow Dent Corn In Pelleted- Or Meal-Based Diets On Finishing Pig Performance And Carcass Characteristics, H. R. Williams, M. D. Tokach, J. C. Woodworth, R. D. Goodband, J. M. Derouchey, S. S. Dritz, C. B. Paulk, H. K. Wecker, H. I. Calderón
Kansas Agricultural Experiment Station Research Reports
A total of 288 pigs (DNA 241 × 600; initially 117 lb) were used in a 72-d trial to evaluate the influence of Enogen Feed corn (Enogen, Syngenta Seeds, LLC; Downers Grove, IL) and conventional yellow dent corn in pelleted or meal diets on finishing pig performance and carcass characteristics. Pigs were randomly assigned to pens (8 pigs per pen) and pens were allotted by weight to 1 of 4 dietary treatments in a randomized complete block design with 9 pens per treatment. Treatments were arranged in a 2 × 2 factorial with main effects of corn source (Enogen Feed …
Pelleting And Starch Characteristics Of Diets Containing High Amylase Corn, C. N. Truelock, M. D. Tokach, C. R. Stark, C. R. Paulk
Pelleting And Starch Characteristics Of Diets Containing High Amylase Corn, C. N. Truelock, M. D. Tokach, C. R. Stark, C. R. Paulk
Kansas Agricultural Experiment Station Research Reports
This experiment was designed to evaluate the effects of die thickness and conditioning temperature on pelleting and starch characteristics in diets containing either conventional yellow dent or high amylase corn (Enogen®, Syngenta Seeds, LLC). Treatments were arranged as a 2 × 2 × 3 factorial of corn type (conventional and high amylase), die thickness (L:D 5.6 and 8.0), and conditioning temperature (165, 175, and 185°F). For the high amylase corn treatments, ground high amylase corn replaced conventional ground corn on a lb:lb basis. Diets were pelleted via steam conditioning (10 in × 55 in Wenger twin staff pre-conditioner, …
Use Of Satellite Imagery To Predict Corn Phenology At A Regional Scale, L. Nieto, R. Schwalbert, I. A. Ciampitti
Use Of Satellite Imagery To Predict Corn Phenology At A Regional Scale, L. Nieto, R. Schwalbert, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
Existing methods to report phenology are expensive, labor-intensive, time-consuming, and often not very accurate, especially at some specific crop growth stages. The objective of this study was to develop large-scale phenology models via utilization of satellite imagery data and machine learning techniques for the southwest (SW) agricultural crop reporting district of Kansas. Different satellite images collected from Landsat were utilized as the main input to obtain different vegetation indices (normalized difference vegetation index, NDVI; enhanced vegetation index, EVI; green chlorophyll vegetation index, GCVI; normalized difference water index, NDWI; and global vegetation moisture index, CVMI). Vapor Pressure Deficit (VPD), temperature, precipitation, …
Pre-Plant Nitrogen Rate And Application Method And Side-Dress Nitrogen Rate Effects On Corn Grown No-Till On A Claypan Soil, D. W. Sweeney, D. Ruiz-Diaz
Pre-Plant Nitrogen Rate And Application Method And Side-Dress Nitrogen Rate Effects On Corn Grown No-Till On A Claypan Soil, D. W. Sweeney, D. Ruiz-Diaz
Kansas Agricultural Experiment Station Research Reports
Corn yield in 2018 was increased by about 5 bu/a with knife application of pre-plant nitrogen (N) fertilizer compared with broadcast application. Fertilizing with increasing rates of N applied pre-plant, at side-dress, or both had little effect on yield or yield components of corn in 2018.