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Effects Of Drought Conditions On Microbial Communities In Native Rangelands, Abbie L. Lasater, Tiffany Carter, Charles Rice 2017 University of Arkansas, Fayetteville

Effects Of Drought Conditions On Microbial Communities In Native Rangelands, Abbie L. Lasater, Tiffany Carter, Charles Rice

Chemical Engineering Undergraduate Honors Theses

Climate change is a result of greenhouse gases released into the atmosphere. These changes are expected to cause extreme weather conditions, including severe storms. Large amounts of rain will fall in shorter periods of time, leading to heavy runoff, and increasing the severity of drought conditions within the soil (Zeglin et al. 2013).

Native grasslands occupy almost a quarter of the earth’s land surface and are valuable ecological resources. They contain soils with high concentrations of organic matter and play a key role in mitigating greenhouse gas emissions through carbon sequestration. There are a variety of grassland management techniques ...


Research Center Personnel, Acknowledgments, L. W. Lomas 2017 Kansas State University

Research Center Personnel, Acknowledgments, L. W. Lomas

Kansas Agricultural Experiment Station Research Reports

Research Center Personnel, Southeast Agricultural Research Center, Kansas

We thank the following individuals, organizations, and firms that contributed to this year’s research programs through financial support, product donations, or services.


Annual Summary Of Weather Data For Parsons, M. Knapp 2017 Kansas State University, Manhattan

Annual Summary Of Weather Data For Parsons, M. Knapp

Kansas Agricultural Experiment Station Research Reports

Annual Summary of Weather Data for Parsons, Kansas, 2016.


Measuring Soil Electrical Conductivity To Delineate Zones Of Variability In Production Fields, Gretchen Sassenrath, S. Kulesza 2017 Kansas State University

Measuring Soil Electrical Conductivity To Delineate Zones Of Variability In Production Fields, Gretchen Sassenrath, S. Kulesza

Kansas Agricultural Experiment Station Research Reports

Production fields in southeast Kansas are highly variable. Differences in elevation and changes in soil texture contribute to unevenness in plant-available moisture and nutrients, resulting in significant inconsistencies in crop production and yield within a field. These variabilities complicate management and impact the return on investments from different areas of the field. Identification of the regions of variability is possible through several methods, including visual inspection, remote imagery, and yield maps. An additional method of assessing soil variability is by measuring the electrical conductivity of the soil. Measuring apparent electrical conductivity gives a map of the spatial distribution of soil ...


Key Components Of Healthy Soils And Their Role In Crop Production, C. J. Hsiao, Gretchen Sassenrath, Charles Rice, L. Zeglin, G. Hettiarachchi 2017 Kansas State University

Key Components Of Healthy Soils And Their Role In Crop Production, C. J. Hsiao, Gretchen Sassenrath, Charles Rice, L. Zeglin, G. Hettiarachchi

Kansas Agricultural Experiment Station Research Reports

Soil health is a confusing term that means different things to different people. To a crop producer, healthy soils are critical for good crop growth and yield. Some soil properties include soil texture, such as the relative percentage of sand, silt and clay; the water content; nutrient levels; organic carbon content; the microbial community; and microbial activity. These properties are determinants of soil health. Our research confirmed that changes in soil management affect the composition and activity of soil microorganisms in surface soils. Greater concentrations of microbial biomass and arbuscular mycorrhizal fungus (AMF) in the no-till agricultural system indicated healthier ...


Wheat Production, Gretchen Sassenrath, D. E. Shoup, R. Lollato 2017 Kansas State University

Wheat Production, Gretchen Sassenrath, D. E. Shoup, R. Lollato

Kansas Agricultural Experiment Station Research Reports

Wheat production in southeast Kansas is often limited due to high rainfall during the harvest. In some years, this high rainfall can exacerbate disease pressure, especially fungal infections. This study presents results from a test of fungicide applications to control Fusarium head blight (FHB) or scab in poor quality wheat.


Cover Crop System To Control Charcoal Rot In Soybeans, Gretchen Sassenrath, C. R. Little, C. J. Hsiao, D. E. Shoup, X. Lin 2017 Kansas State University

Cover Crop System To Control Charcoal Rot In Soybeans, Gretchen Sassenrath, C. R. Little, C. J. Hsiao, D. E. Shoup, X. Lin

Kansas Agricultural Experiment Station Research Reports

This research compares methods of controlling charcoal rot in soybean cultivars from three maturity groups commonly grown in southeast Kansas. The results indicate that a mustard plant that produces high levels of glucosinolates can be used as a cover crop to reduce the charcoal rot disease in soybeans.


Crop Production Summary, Southeast Kansas – 2016, Gretchen Sassenrath, L. Mengarelli, Jane Lingenfelser, X. Lin, D. E. Shoup 2017 Kansas State University

Crop Production Summary, Southeast Kansas – 2016, Gretchen Sassenrath, L. Mengarelli, Jane Lingenfelser, X. Lin, D. E. Shoup

Kansas Agricultural Experiment Station Research Reports

Crop production in southeast Kansas is summarized from variety trials and research plot experiments conducted at the Southeast Research and Extension Center fields in 2016.


Response Of Soybean Grown On A Claypan Soil In Southeastern Kansas To The Residual Of Different Plant Nutrient Sources And Tillage, D. W. Sweeney, Philip Barnes, Gary Pierzynski 2017 Kansas State University

Response Of Soybean Grown On A Claypan Soil In Southeastern Kansas To The Residual Of Different Plant Nutrient Sources And Tillage, D. W. Sweeney, Philip Barnes, Gary Pierzynski

Kansas Agricultural Experiment Station Research Reports

Soybean yields measured from 2014 through 2016 were more than 50% greater from the residual from N-based turkey litter applications during 2011 through 2013 than in the control where no nitrogen (N) or phosphorus (P) was applied. However, residual from P-based turkey litter applications or fertilizer-only did not result in soybean yield different from the no N-P control. This residual effect on yield was largely due to increased pods per plant.


Timing Of Side-Dress Applications Of Nitrogen For Corn In Conventional And No-Till Systems, D. W. Sweeney, D. E. Shoup 2017 Kansas State University

Timing Of Side-Dress Applications Of Nitrogen For Corn In Conventional And No-Till Systems, D. W. Sweeney, D. E. Shoup

Kansas Agricultural Experiment Station Research Reports

Corn yields were affected by tillage and nitrogen (N) side-dress options in 2016. Corn yields were 12% greater with conventional tillage than with no-till. Side-dress applications of N at V10 resulted in greater corn yield than side-dress N applications at V6.


Tillage And Nitrogen Placement Effects On Yields In A Short-Season Corn/Wheat/ Double-Crop Soybean Rotation, D. W. Sweeney 2017 Kansas State University

Tillage And Nitrogen Placement Effects On Yields In A Short-Season Corn/Wheat/ Double-Crop Soybean Rotation, D. W. Sweeney

Kansas Agricultural Experiment Station Research Reports

In 2016, adding nitrogen (N) greatly improved average wheat yields, but the response to tillage and different N placement methods was minimal. Double-crop soybean yields were unaffected by tillage or the residual from N treatments that were applied to the previous wheat crop.


Nitrogen, Phosphorus, And Potassium Fertilization For Newly Established Tall Fescue, D. W. Sweeney, J. L. Moyer, J. K. Farney 2017 Kansas State University

Nitrogen, Phosphorus, And Potassium Fertilization For Newly Established Tall Fescue, D. W. Sweeney, J. L. Moyer, J. K. Farney

Kansas Agricultural Experiment Station Research Reports

Tall fescue production was studied during a third year at two locations. In 2015, Site 1 was affected by an interaction between nitrogen (N) and phosphorus (P) fertilization rates; while in 2016, Site 2 mainly received production differences by N fertilization rates. Potassium (K) fertilization caused little effect at both sites.

Third-year production of tall fescue was affected by an interaction between nitrogen (N) and phosphorus (P) fertilization rates at Site 1 in 2015, but mainly by N fertilization rates at Site 2 in 2016, with little effect from potassium (K) fertilization at either site.


Adaptability Of Miscanthus Cultivars For Biomass Production, J. L. Moyer 2017 Kansas State University

Adaptability Of Miscanthus Cultivars For Biomass Production, J. L. Moyer

Kansas Agricultural Experiment Station Research Reports

In 2016, miscanthus dry matter production (DM) averaged 8,890 lb DM/a and did not differ between the two cultivars in production at the Mound Valley Unit of the Southeast Agricultural Research Center. Total three-year production for the cultivars was also similar, averaging 35,050 lb/a.


Evaluation Of Tall Fescue Cultivars, J. L. Moyer 2017 Kansas State University

Evaluation Of Tall Fescue Cultivars, J. L. Moyer

Kansas Agricultural Experiment Station Research Reports

Spring 2016 yield of tall fescue was higher for ‘NFTF 1051’ than for 12 of the 19 other cultivar entries. Summer production of ‘PBU-B2’ was greater than summer production of the three lower-yielding entries. Fall production of ‘BarOptima PLUS E34’ was higher than that of 12 other cultivar entries, but total 2016 production was greater for PBU-B2, ‘PBU-B7’, and NFTF 1051 than for eight other cultivars.


Including Legumes In Bermudagrass Pastures, J. L. Moyer, L. W. Lomas 2017 Kansas State University

Including Legumes In Bermudagrass Pastures, J. L. Moyer, L. W. Lomas

Kansas Agricultural Experiment Station Research Reports

Use of legumes in bermudagrass pastures did not affect summer cow gains in 2016. Forage availability was also similar where ladino clover was used in the Legume system compared with where Nitrogen (N) alone was used. Estimated forage crude protein (CP) was greater for the Legume than the Nitrogen system in early summer, but was similar by mid-summer.


Effects Of Various Grazing Systems On Grazing And Subsequent Finishing Performance, L. W. Lomas, J. L. Moyer 2017 Kansas State University

Effects Of Various Grazing Systems On Grazing And Subsequent Finishing Performance, L. W. Lomas, J. L. Moyer

Kansas Agricultural Experiment Station Research Reports

A total of 280 mixed black yearling steers were used to compare grazing and subsequent finishing performance from pastures with ‘MaxQ’ tall fescue, a wheat-bermudagrass double-crop system, or a wheat-crabgrass double-crop system in 2010, 2011, 2012, 2013, 2014, 2015, and 2016. Daily gains of steers that grazed MaxQ fescue, wheatbermudagrass, or wheat-crabgrass were similar (P > 0.05) in 2010 and 2016. Daily gains of steers that grazed wheat-bermudagrass or wheat-crabgrass were greater (P > 0.05) than those that grazed MaxQ fescue in 2011 and 2012. Daily gains of steers that grazed wheat-crabgrass were greater (P > 0.05) than those that ...


Effects Of Interseeding Ladino Clover Into Tall Fescue Pastures Of Varying Endophyte Status On Grazing Performance Of Stocker Steers, L. W. Lomas, J. L. Moyer 2017 Kansas State University

Effects Of Interseeding Ladino Clover Into Tall Fescue Pastures Of Varying Endophyte Status On Grazing Performance Of Stocker Steers, L. W. Lomas, J. L. Moyer

Kansas Agricultural Experiment Station Research Reports

Sixty-four yearling steers grazing tall fescue pastures were used to evaluate the effects of fescue cultivar and interseeding ladino clover on grazing gains and available forage. Fescue cultivars evaluated were high-endophyte ‘Kentucky 31,’ low-endophyte ‘Kentucky 31,’ ‘HM4,’ and ‘MaxQ.’ Steers that grazed pastures of low-endophyte ‘Kentucky 31,’ ‘HM4,’ or ‘MaxQ’ gained significantly more (P < 0.05) and produced more (P < 0.05) gain/a than those that grazed high-endophyte ‘Kentucky 31’ pastures. Gains of cattle that grazed low-endophyte ‘Kentucky 31,’ ‘HM4,’ or ‘MaxQ’ were similar (P > 0.05). High-endophyte ‘Kentucky 31’ pastures had more (P < 0.05) available forage than lowendophyte ‘Kentucky 31,’ ‘HM4,’ or ‘MaxQ’ pastures.


A Study Of The Secondary Effects Of Hill Fertilization, Horace J. Harper 2017 Iowa State College

A Study Of The Secondary Effects Of Hill Fertilization, Horace J. Harper

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

A field, laboratory, and greenhouse study of secondary effects of hill fertilization was made using several different soils as follows: Carrington loam, Webster silt loam, Grundy silt loam, Knox silt loam, Marion silt loam, and Buckner coarse sand. The effect of hill fertilization on the root development of the corn plant was also investigated.

Acid phosphate was found to have a more pronounced effect on the hydrogen ion concentration of the soil solution than either ammonium sulfate or potassium chloride. In most cases the first effect of acid phosphate was to increase the acidity of the soil solution. In poorly ...


Relationships Between Hydrogen Ion, Hydroxyl Ion And Salt Concentrations And The Growth Of Seven Soil Molds, Harlan W. Johnson 2017 Iowa State College

Relationships Between Hydrogen Ion, Hydroxyl Ion And Salt Concentrations And The Growth Of Seven Soil Molds, Harlan W. Johnson

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

Comparatively few data have been recorded relative to the effect of hydrogen ion concentration on the development and activities of molds and other fungi, altho such records have been secured for the bacteria. For both groups much more work has been accomplished on the effect of titratable acidity. The importance of molds in transforming plant food in the soil has made advisable the securing of such data. The present paper records the results of a study of the limiting and optimum hydrogen and hydroxyl ion concentrations and the limiting concentrations of several salts as related to the growth of seven ...


The Color Of Soils In Relation To Organic Matter Content, P. E. Brown, A. M. O'Neal 2017 Iowa State College

The Color Of Soils In Relation To Organic Matter Content, P. E. Brown, A. M. O'Neal

Research Bulletin (Iowa Agriculture and Home Economics Experiment Station)

The color of soils has long been considered to indicate to some extent, at least, their fertility. For centuries farmers in the humid regions have been accustomed to select their land very largely on the basis of color. Dark colored soils have been preferred because experience has shown that such soils are usually more productive than light colored types. But just what the relation is between the color of soils and their fertility or crop-producing power has never been determined. It has been assumed that the organic matter or humus content, which is mainly responsible for the color of soils ...


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