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Articles 631 - 660 of 938
Full-Text Articles in Life Sciences
Sudden Death Syndrome And Soybean Planting Date, Eric Adee, C. R. Little, I. A. Ciampitti
Sudden Death Syndrome And Soybean Planting Date, Eric Adee, C. R. Little, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
The effect of planting date on severity of sudden death syndrome (SDS) and yield was evaluated for the second year in two studies at the Kansas River Valley experiment fields in 2016. One study was established to promote SDS and the other to minimize SDS. In both studies the severity of SDS was greatest with the earlier planting dates. The yield was greatest with the earlier planting date, except for the most susceptible variety. The severity of SDS was not as great as had been observed in previous years. There is a very positive benefit to planting in early May …
Closing Soybean Yield Gaps Via Improved Management: A Systems Approach, G. R. Balboa, I. A. Ciampitti
Closing Soybean Yield Gaps Via Improved Management: A Systems Approach, G. R. Balboa, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
Three soybean research trials were conducted during the 2016 growing season. Two studies were conducted at Scandia, KS, (dryland and irrigated) and one at Topeka, KS (dryland). The objective of this study was to investigate the contribution of different farming systems for closing soybean yield gaps. Each experiment consisted of five treatments: common practices (CP), comprehensive fertilization (CF), production intensity (PI), ecological intensification (CF + PI), and advanced plus (AD). The EI and AD treatments presented the maximum yields at both locations. Under irrigation conditions, yield gap was larger at Scandia relative to Topeka site. Across all three soybean experiments, …
Planting Date By Maturity Group In Kansas: 2016 Season And Three-Year Summary, I. A. Ciampitti, O. Ortez, D. E. Shoup, Eric Adee, J. Kimball, Gretchen Sassenrath, G. Cramer
Planting Date By Maturity Group In Kansas: 2016 Season And Three-Year Summary, I. A. Ciampitti, O. Ortez, D. E. Shoup, Eric Adee, J. Kimball, Gretchen Sassenrath, G. Cramer
Kansas Agricultural Experiment Station Research Reports
Optimal planting should be timed to capture a favorable environment (e.g., fall rains and cooler temperatures during grain filling). Five field studies were conducted during the 2014 growing season (Manhattan, Topeka, Ottawa, Parsons, and Hutchinson); five in 2015 (Manhattan, Rossville, Ottawa, Parsons, and Hutchinson); and three in 2016 (Manhattan, Topeka, and Ottawa). This study explores the impact of planting date (early-, mid-, and late-planted) on yield for soybean cultivars from a range of maturity groups (early, medium, and late groups). For 2016, the overall main factor impacting yield across sites was planting date, which increased yields with early-planted soybeans. Based …
Seed Yield And Biological Nitrogen Fixation For Historical Soybean Genotypes, S. Tamagno, I. A. Ciampitti
Seed Yield And Biological Nitrogen Fixation For Historical Soybean Genotypes, S. Tamagno, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
Seed yield formation and biological nitrogen (N) fixation (BNF) were evaluated during the seed filling period (SFP) for historical soybean genotypes under contrasting N strategies. Overall, seed yield increased with the year of release, primarily associated with increments in the seed number component. The study showed that seed weight factor was maintained across decades regardless of the improvement in seed number. Nitrogen factor, evaluated as zero-N application via inorganic fertilizers versus high-N added, influenced seed yield via impacting seed weight factor. The latter plant trait improved with the high-N treatment, which was related to changes in the duration of the …
Soybean: Evaluation Of Inoculation, T. M. Albuquerque, O. Ortez, G. I. Carmona, I. A. Ciampitti
Soybean: Evaluation Of Inoculation, T. M. Albuquerque, O. Ortez, G. I. Carmona, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
Most of the nitrogen (N) required by a soybean plant is supplied via biological nitrogen fixation (BNF). When BNF is adequately established in the soil, soybean can obtain up to 50 to 75% of its N from the air. This project aims to quantify the response to inoculation for soybean in its second year in a field without previous history of this crop. Due to this objective, a field study was conducted during the 2015 and 2016 growing seasons at Ottawa, KS (East Central experiment field location). The treatments consisted of five different N-management approaches: non-inoculated (NI), inoculated ×1 (I×1), …
Soybean: Genetic Gain × Fertilizer Nitrogen Interaction, O. Ortez, F. Salvagiotti, Eric Adee, J. Enrico, I. A. Ciampitti
Soybean: Genetic Gain × Fertilizer Nitrogen Interaction, O. Ortez, F. Salvagiotti, Eric Adee, J. Enrico, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
The United States (US) and Argentina (ARG) account for more than 50% of the global soybean production. Soybean yields are determined by the genotype, environment, and management practices (G × E × M) interaction. Overall, 50-60% of soybean nitrogen (N) demand is usually met by the biological nitrogen fixation (BNF) process. An unanswered scientific question concerns the ability of BNF process to satisfy soybean N demand at varying yield levels. The overall objective of this project was to study the contribution of N via utilization of different N strategies, evaluating soybean genotypes released in different eras. Four field experiments were …
Genotype By Seeding Rate Interaction In Wheat, A. J. Azevedo, S. Varela, R. Lollato, I. A. Ciampitti
Genotype By Seeding Rate Interaction In Wheat, A. J. Azevedo, S. Varela, R. Lollato, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
Genotype by seeding rate interaction can play a critical role in understanding wheat (Triticum aestivumL.) yield potential. The objective of this study was to quantify wheat yield response to seeding rates by contrasting genotypes (high- vs. low-tillering). One study was planted at two locations: Ashland Bottoms (dryland and conventional tillage) and at Topeka (irrigated and no-tillage) field research stations (Kansas). The two winter wheat varieties were sown at four different seeding rates (40, 80, 120, and 160 lb/a). Measurements consisted of stand counts, canopy coverage (estimated via imagery collection), determination of early-season gaps in the final stand (missing …
Wheat Variety Response To Seed Cleaning Method And Pesticide Seed Treatment Following A Growing Season With Severe Infestation Of Fusarium Head Blight, R. Lollato, R. Maeoka, B. R. Jaenisch, A. De Oliveira Silva
Wheat Variety Response To Seed Cleaning Method And Pesticide Seed Treatment Following A Growing Season With Severe Infestation Of Fusarium Head Blight, R. Lollato, R. Maeoka, B. R. Jaenisch, A. De Oliveira Silva
Kansas Agricultural Experiment Station Research Reports
Fusarium head blight (scab) is a common concern in eastern and central Kansas. Wheat seed quality might be compromised following a growing season with severe infestation of scab. Our objectives were to evaluate the effects of variety, seed cleaning method, and seed treatment, on wheat stand establishment and yield following a growing season where scab was severe. A trial was established during the 2015-16 growing season using seed harvested from the 2014-15 growing season, which was characterized by severe infestation of scab. Three commonly grown wheat varieties with differing levels of scab resistance (Everest, SY Wolf, and WB Grainfield) were …
Optimum Seeding Rate For Different Wheat Varieties In Kansas, R. Lollato, G. Cramer, A. K. Fritz, G. Zhang
Optimum Seeding Rate For Different Wheat Varieties In Kansas, R. Lollato, G. Cramer, A. K. Fritz, G. Zhang
Kansas Agricultural Experiment Station Research Reports
Seeding rate is an important management practice affecting wheat yield. Wheat varieties differ in their tillering capacity and therefore in their yield response to seeding rate. Our objectives were to evaluate the tillering and yield response of different modern wheat varieties to seeding rate. The study was conducted in Hutchinson and Manhattan, KS, during the 2015-16 growing season. Seven wheat varieties (Everest, KanMark, 1863, Joe, Tatanka, Larry, and Zenda) were sown at five different seeding rates (0.6, 0.95, 1.3, 1.65, and 2 million seeds per acre). Tiller number and grain yield were measured in the spring. Increasing plant population decreased …
Timing And Positioning Of Simulated Hail Damage Effects On Wheat Yield In Kansas, R. Lollato, B. R. Jaenisch, R. Maeoka, A. De Oliveira Silva, C. Sciarresi
Timing And Positioning Of Simulated Hail Damage Effects On Wheat Yield In Kansas, R. Lollato, B. R. Jaenisch, R. Maeoka, A. De Oliveira Silva, C. Sciarresi
Kansas Agricultural Experiment Station Research Reports
Hail events often decrease wheat yields in Kansas; however, estimates of yield loss due to hail event timing and position relative to the flag leaf are only available for old varieties. Our objectives were to quantify wheat yield losses as affected by timing of hail event relative to the crop development and positioning of the damage relative to the flag leaf. A total of 12 hail damage treatments including six different timings during the growing season (boot, anthesis, milk, soft dough, hard dough, and ripe) and two different positionings relative to the flag leaf (above or below) were evaluated in …
Productivity Of A Triticale And Crimson Clover Winter Cover Crop For Dairies, K. Olagaray, C. Takiya, M. Scheffel, T. Brown, J. S. Stevenson, D. H. Min, B. Bradford
Productivity Of A Triticale And Crimson Clover Winter Cover Crop For Dairies, K. Olagaray, C. Takiya, M. Scheffel, T. Brown, J. S. Stevenson, D. H. Min, B. Bradford
Kansas Agricultural Experiment Station Research Reports
The potential for a winter cover crop to align with agronomic objectives and to support milk production was evaluated at the Kansas State University Dairy Teaching and Research Center, Manhattan, KS. August planting of a triticale and crimson clover blend following corn silage harvest resulted in production of more than 3.5 tons of dry matter prior to subsequent corn planting. After ensiling, the impact of triticale/crimson clover silage (TCS) on milk production was evaluated in 48 mid- to late-lactation Holstein cows. Cows were blocked by parity (1 and 2+) and milk production, then randomly assigned within block to treatment sequence …
Development Of A Berry Processing Score For Sorghum Silage And Assessment Of Processing Effects On Sorghum Silage Starch Digestibility, J. R. Johnson, J. P. Goeser, Michael Brouk
Development Of A Berry Processing Score For Sorghum Silage And Assessment Of Processing Effects On Sorghum Silage Starch Digestibility, J. R. Johnson, J. P. Goeser, Michael Brouk
Kansas Agricultural Experiment Station Research Reports
The objectives of this study were to develop a berry processing score (BPS) for sorghum silage, similar to the kernel processing score currently used for corn silage, and to evaluate the effects of processing on starch digestibility. Sorghum silage samples were collected from commercial farms in Kansas and randomly assigned to 1 of 4 processing levels differing in roll gap spacing: unprocessed (UNP), 1.5 (1.5P), 1.0 (1.0P), or 0.5 (0.5P) mm. Differences in BPS and starch digestibility were found–as the roll gap decreased, both BPS and starch digestibility increased. Thus, by processing sorghum silage during harvest and measuring the extent …
Sudden Death Syndrome And Soybean Planting Date, Eric Adee, C. R. Little, I. A. Ciampitti
Sudden Death Syndrome And Soybean Planting Date, Eric Adee, C. R. Little, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
The effect of soybean planting date on the severity of sudden death syndrome (SDS) and yield were evaluated in two studies at the Kansas River Valley Experiment Field in 2015. One study was established to promote SDS and the other to minimize SDS. In both studies the severity of SDS was greatest with the earlier planting dates, except for the more tolerant variety. The yield was greatest with the earlier planting date, except for the most susceptible variety. The severity of SDS was not as great as had been observed in previous years.
Evaluating The Interaction Between Chelated Iron Source And Placement On Phosphorus Availability In Soybean, C. L. Edwards, D. Ruiz Diaz
Evaluating The Interaction Between Chelated Iron Source And Placement On Phosphorus Availability In Soybean, C. L. Edwards, D. Ruiz Diaz
Kansas Agricultural Experiment Station Research Reports
In agriculture, chelating agents are used to supplement micronutrients, such as iron (Fe). However, little research has been conducted at the field-scale level to evaluate chelating agent effects on phosphorus (P). The objectives of this study were to evaluate three commercially available chelated Fe sources on early soybean growth and nutrient uptake. The study was conducted at six locations in 2014 and 2015. The experimental design was a randomized, complete block with a factorial treatment arrangement. The two factors included fertilizer source and fertilizer placement. The fertilizer sources were P only, EDTA-Fe, HEDTA-Fe, and one glucoheptonate product, Cee*Quest N5Fe758 (CQ-758), …
Large-Scale Dryland Cropping Systems, A. Schlegel, L. Haag, D. O'Brien
Large-Scale Dryland Cropping Systems, A. Schlegel, L. Haag, D. O'Brien
Kansas Agricultural Experiment Station Research Reports
This study was conducted from 2008 to 2015 at the Kansas State University Southwest Research-Extension Center near Tribune, Kansas. 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-till practices except for WF, which was grown using reduced-tillage. Precipitation capture efficiency was not greater with more intensive rotations. Wheat yields were not affected by length of rotation. Corn and grain sorghum yields were about 60% greater when following wheat than when following corn or grain sorghum. Grain sorghum yields were almost twice as great …
Evaluation Of Tall Fescue Cultivars, J. L. Moyer
Evaluation Of Tall Fescue Cultivars, J. L. Moyer
Kansas Agricultural Experiment Station Research Reports
Spring 2015 yield was higher for ‘Ky 31 EF’ than for nine of the 19 other entries. Summer production of ‘PBU-B7’ was greater than for five lower-yielding entries. Total 2015 production was greater for ‘PBU-B1’ and Ky 31 EF than for seven other cultivars.
East Central Kansas Experiment Field, Eric Adee
East Central Kansas Experiment Field, Eric Adee
Kansas Agricultural Experiment Station Research Reports
The research program at the East Central Kansas Experiment Field is designed to keep area crop producers abreast of technological advances in agronomic agriculture. Specific objectives are to (1) identify top performing varieties and hybrids of wheat, corn, soybean, and grain sorghum; (2) establish the amount of tillage and crop residue cover needed for optimum crop production; (3) evaluate weed and disease control practices using chemical, no chemical, and combination methods; and (4) test fertilizer rates, timing, and application methods for agronomic proficiency and environmental stewardship.
Kansas River Valley Experiment Field, Eric Adee
Kansas River Valley Experiment Field, Eric Adee
Kansas Agricultural Experiment Station Research Reports
The Kansas River Valley Experiment Field was established to study management and effective use of irrigation resources for crop production in the Kansas River Valley (KRV). The Paramore Unit consists of 80 acres located 3.5 miles east of Silver Lake on U.S. Highway 24, then 1 mile south of Kiro, and 1.5 miles east on 17th street. The Rossville Unit consists of 80 acres located 1 mile east of Rossville or 4 miles west of Silver Lake on U.S. Highway 24.
Soybean: Evaluation Of Inoculation, I. A. Ciampitti, Eric Adee, J. Kimball, G. I. Carmona
Soybean: Evaluation Of Inoculation, I. A. Ciampitti, Eric Adee, J. Kimball, G. I. Carmona
Kansas Agricultural Experiment Station Research Reports
A soybean crop can obtain up to 50 to 75% of its nitrogen (N) requirements from the air when the biological fixation is effectively established (Pedersen, 2007). The overall objective of this project was to quantify the response to inoculation for soybean in a field without previous history of this crop. Following this rationale, a field study was conducted during the 2015 growing season at Ottawa (east central Kansas). The treatments consisted in five different N management approaches: non-inoculated, inoculated × 1, inoculated × 2, inoculated × 3 and non-inoculated but fertilized with 300 lb N per acre as the …
Integrated Grain And Forage Rotations, J. D. Holman, T. Roberts, S. Maxwell
Integrated Grain And Forage Rotations, J. D. Holman, T. Roberts, S. Maxwell
Kansas Agricultural Experiment Station Research Reports
Producers are interested in growing forages in rotation with grain crops. Many producers are interested in diversifying their operations to include livestock or grow feed for the livestock industry. By integrating forages into the cropping system, producers can take advantage of more markets and reduce market risk. Forages require less water to make a crop than grain crops, so the potential may exist to reduce fallow by including forages in the crop rotation. Reducing fallow through intensified grain/forage rotations may increase the profitability and sustainability compared to existing crop rotations.
This study was started in 2013, with crops grown in-phase …
Weed Control With Postemergence Applications Of Status, Armezon, Atrazine, Corvus, Verdict, And Roundup Powermax In Irrigated Corn, R. Currie, P. Geier
Weed Control With Postemergence Applications Of Status, Armezon, Atrazine, Corvus, Verdict, And Roundup Powermax In Irrigated Corn, R. Currie, P. Geier
Kansas Agricultural Experiment Station Research Reports
All postemergence herbicides provided greater than 98% control of quinoa, common sunflower, Palmer amaranth, and green foxtail. Crabgrass and Russian thistle were more difficult to control. All postemergence herbicides except Roundup PowerMax (glyphosate) alone controlled Russian thistle and crabgrass greater than 89%. Diflexx (dicamba) plus Roundup PowerMax was slightly more efficacious on kochia than Status (diflufenzopyr + dicamba) plus Armezon (topramezone) with atrazine and Roundup PowerMax, and all other herbicides were intermediate for kochia control. Corn yields did not differ between herbicide treatments. However, all herbicides increased grain yields.
Control Of Individual Honey Locust Trees In Grazed Pasture, K. R. Harmoney
Control Of Individual Honey Locust Trees In Grazed Pasture, K. R. Harmoney
Kansas Agricultural Experiment Station Research Reports
Honey locust (Gleditsia triacanthos) is a deciduous tree that produces large brown seed pods and thorny appendages, and is present throughout most of the US. The pods are highly nutritious for livestock and wildlife, and are easily spread by animals in dung pats. Honey locust is typically found in greatest concentrations in the central U.S. in the same general range as historical tallgrass prairie. Fire suppression and introduction of honey locust into shelter belts has allowed honey locust to increase into more arid regions associated with mixed grass prairie. When cut, honey locust is capable of producing abundant …
Annual Summary Of Weather Data For Parsons, M. Knapp
Annual Summary Of Weather Data For Parsons, M. Knapp
Kansas Agricultural Experiment Station Research Reports
Weather Data for Parsons, Kansas, 2015.
Personnel, Acknowledgments, L. W. Lomas
Personnel, Acknowledgments, L. W. Lomas
Kansas Agricultural Experiment Station Research Reports
Research Center Personnel, Kansas State University Southeast Agricultural Research Center.
Acknowledgments: We thank the following individuals, organizations, and firms that contributed to this year’s research programs through financial support, product donations, or services.
Weed Control With Single Or Sequential Herbicide Applications In Acetolactase Synthase-Tolerant Grain Sorghum, R. Currie, P. Geier
Weed Control With Single Or Sequential Herbicide Applications In Acetolactase Synthase-Tolerant Grain Sorghum, R. Currie, P. Geier
Kansas Agricultural Experiment Station Research Reports
Palmer amaranth control was best when Resolve (rimsulfuron) plus Harmony GT (thifensulfuron) and Abundit Extra (glyphosate) were applied 15 days preplant followed by Zest (nicosulfuron) and atrazine postemergence, or by Zest plus atrazine alone postemergence. Palmer amaranth control was less than 80% with all other herbicide treatments. Preemergence herbicides alone provided less than 60% green foxtail control at 53 days after postemergence applications, and Zest plus atrazine alone postemergence controlled green foxtail 70%. Sequential applications of preemergence and postemergence herbicides were needed to provide the best green foxtail control. The relatively low weed control provided by these treatments may be …
Preemergence Weed Control With Fultime Nxt And Competitive Standards In Grain Sorghum, R. Currie, P. Geier
Preemergence Weed Control With Fultime Nxt And Competitive Standards In Grain Sorghum, R. Currie, P. Geier
Kansas Agricultural Experiment Station Research Reports
At 71 days after treatment, FulTime NXT (acetochlor + atrazine) at 2.5 or 3.0 qt/a and Lumax EZ (S-metolachlor + atrazine + mesotrione) at 2.0 qt/a were the only treatments to control Palmer amaranth at 90% or more. All treatments provided similar velvetleaf control. Green foxtail control was 75 to 83% with all rates of FulTime NXT or Lumax EZ. Sorghum receiving FulTime NXT at 2.5 or 3.0 qt/a or Lumax EZ yielded significantly more than the control treatments.
Old World Bluestem Seedling Emergence And Vegetative Cover Following Glyphosate Treatment, K. R. Harmoney
Old World Bluestem Seedling Emergence And Vegetative Cover Following Glyphosate Treatment, K. R. Harmoney
Kansas Agricultural Experiment Station Research Reports
Old world bluestems (OWB) are perennial warm-season grasses introduced into the U.S. from parts of Asia, eastern Europe, Africa, and Australia. The two most common old world bluestem species found in Kansas are yellow bluestem (Bothriochloa ischaemum), otherwise known as King Ranch bluestem, and Caucasian bluestem (Bothriochloa bladhii). These grasses were introduced for soil conservation and forage production in arid regions of the southern Great Plains; however, in Kansas and elsewhere, they have escaped areas where planted and have been invading native rangelands and pastures that were old crop fields seeded back to native grasses. Efforts …
Including Legumes In Bermudagrass Pastures, J. L. Moyer, L. W. Lomas
Including Legumes In Bermudagrass Pastures, J. L. Moyer, L. W. Lomas
Kansas Agricultural Experiment Station Research Reports
Use of legumes in bermudagrass pastures has often increased summer cow gains. Forage production was greater where ladino clover was used in the Legume system than where Nitrogen (N) alone was used in the first sampling, but the reverse was true in midsummer. Estimated forage crude protein during 2015 was greater for the Legume than the Nitrogen system in the first and last samplings, but similar in mid-summer pasture. Cow performance over the season was increased 68% where legumes were used.
Timing Of Side-Dress Applications Of N For Corn In Conventional And No-Till Systems, D. W. Sweeney, D. E. Shoup
Timing Of Side-Dress Applications Of N For Corn In Conventional And No-Till Systems, D. W. Sweeney, D. E. Shoup
Kansas Agricultural Experiment Station Research Reports
In general, conventional tillage averaged nearly 40 bu/acre greater corn yield than no-till likely because of improved growth during the season. With conventional tillage, all side-dress treatments resulted in greater yield than with all N applied pre-plant. However, in lower-yielding no-till systems, the yield response to side-dress applications appeared to be greater for V10 applications compared with those at V6.
Use Of A Fungicide To Reduce Stomatal Conductance In Sweet Corn Planted At Different Populations With Limited Irrigation, D. W. Sweeney, M. B. Kirkham
Use Of A Fungicide To Reduce Stomatal Conductance In Sweet Corn Planted At Different Populations With Limited Irrigation, D. W. Sweeney, M. B. Kirkham
Kansas Agricultural Experiment Station Research Reports
In 2015, increasing seeding rates increased the number of harvested sweet corn ears; however, total fresh weight did not increase above 22,500 seeds/acre. Sweet corn was little affected by limited irrigation or a fungicide applied for stomatal control.