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Fertilizer Placement And Tillage Interaction In Corn And Soybean Production, A. T. Rosa, D. A. Ruiz Diaz 2015 Kansas State University

Fertilizer Placement And Tillage Interaction In Corn And Soybean Production, A. T. Rosa, D. A. Ruiz Diaz

Kansas Agricultural Experiment Station Research Reports

Different tillage systems can affect the availability of phosphorus (P) by changing the soil environment. The objective of this study was to evaluate the effects and interaction of fertilizer placement, tillage, and varieties for soybean and corn. The experiment was established at two locations in Kansas in 2014. The experimental design was a factorial in a randomized complete block with four replications. Three fertilizer treatments were combined with two tillage systems and two varieties of soybean and corn selected based on contrasting root systems. Plant tissue samples were collected during the vegetative and reproductive stages to evaluate P concentration, P ...


Evaluation Of Secondary And Micronutrients For Soybean Production In Kansas, M. N. Gutierrez, D. A. Ruiz Diaz 2015 Kansas State University

Evaluation Of Secondary And Micronutrients For Soybean Production In Kansas, M. N. Gutierrez, D. A. Ruiz Diaz

Kansas Agricultural Experiment Station Research Reports

Study of secondary and micronutrients is growing because of their potential contribution to yield increases. The objective of this study was to evaluate soybean response to secondary and micronutrient fertilizer application to maximize yields. A randomized complete block design was employed with four replications at five locations during 2013 and five locations in 2014. Treatments consisted of an unfertilized control; micronutrient fertilizer as individual nutrients for boron, copper, manganese, sulfur, and zinc; and a mix of these nutrients using two different placements (dry broadcast and liquid band). Soil samples were collected prior to planting and after harvest. Soybean trifoliates were ...


Elevational Gradients In Β-Diversity Reflect Variation In The Strength Of Local Community Assembly Mechanisms Across Spatial Scales, J Sebastián Tello, Jonathan A. Myers, Manuel J. Macia, Alfredo F. Fuentes, Leslie Cayola, Gabriel Arellano, M Isabel Loza, Vania Torrez, Maritza Cornejo, Tatiana B. Miranda, Peter M. Jørgensen 2015 Washington University in St. Louis

Elevational Gradients In Β-Diversity Reflect Variation In The Strength Of Local Community Assembly Mechanisms Across Spatial Scales, J Sebastián Tello, Jonathan A. Myers, Manuel J. Macia, Alfredo F. Fuentes, Leslie Cayola, Gabriel Arellano, M Isabel Loza, Vania Torrez, Maritza Cornejo, Tatiana B. Miranda, Peter M. Jørgensen

Biology Faculty Publications

Despite long-standing interest in elevational-diversity gradients, little is known about the processes that cause changes in the compositional variation of communities (β-diversity) across elevations. Recent studies have suggested that β-diversity gradients are driven by variation in species pools, rather than by variation in the strength of local community assembly mechanisms such as dispersal limitation, environmental filtering, or local biotic interactions. However, tests of this hypothesis have been limited to very small spatial scales that limit inferences about how the relative importance of assembly mechanisms may change across spatial scales. Here, we test the hypothesis that scale-dependent community assembly mechanisms shape ...


An Individual-Based Model Of Chaparral Vegetation Response To Frequent Wildfire, Timothy Lucas, Dayna Mann, Reanna Dona 2015 Pepperdine University

An Individual-Based Model Of Chaparral Vegetation Response To Frequent Wildfire, Timothy Lucas, Dayna Mann, Reanna Dona

Undergraduate Research And Scholarly Achievement Symposium

In recent years, the Santa Monica Mountains (SMM) have been plagued by frequent wildfires which threaten the native chaparral species. Nonsprouting chaparral species are completely killed by a fire, but their seeds germinate in response to fire cues. Facultative sprouters both resprout after a wildfire and release seeds that germinate post-fire. This project is based on data collected since 1986 at a biological preserve adjacent to the Malibu campus of Pepperdine University with an average fire return interval of 7.5 years. We present a spatial model that simulates the growth, seed dispersal and resprouting behavior of individual shrubs that ...


Soybean Planting Date × Maturity Group: Eastern Kansas Summary, I. A. Ciampitti, D. E. Shoup, G. Sassenrath, J. Kimball, E. A. Adee 2015 Kansas State University

Soybean Planting Date × Maturity Group: Eastern Kansas Summary, I. A. Ciampitti, D. E. Shoup, G. Sassenrath, J. Kimball, E. A. Adee

Kansas Agricultural Experiment Station Research Reports

Optimum planting time for soybean depends on the interaction between genotype and environment (G × E). Four field studies were conducted during the 2014 growing season across eastern Kansas (Manhattan, Topeka, Ottawa, and Parsons). This study explores the impact of planting date (early, mid, and late planting times) on yield for modern soybean cultivars from a range of maturity groups (early, medium, and late groups).


Ag Supplies For 2015, Chad Hart, Lee L. Schulz 2015 Iowa State University

Ag Supplies For 2015, Chad Hart, Lee L. Schulz

Agricultural Policy Review

Markets are the mechanism that balance supply and demand for products. Over the course of the past year, we have discussed the demand patterns for agricultural products in the US and the factors that influence that demand. Now it’s time to look at the other half of the marketplace: agricultural product supplies. During the past couple of years, crop and livestock supplies have been moving in opposite directions. Crop supplies have grown as farmers have brought more land into corn and soybean production and weather conditions allowed record yields. Meanwhile, livestock supplies have shrunk as livestock producers reduced herds ...


A Soil Parameters Geodatabase For The Modeling Assessment Of Agricultural Conservation Practices Effects In The United States, Mauro Di Luzio, Martin L. Norfleet, Jeffrey G. Arnold, Jimmy R. Williams, James R. Kiniry 2015 Blackland Research Center, Texas A&M AgriLife Research

A Soil Parameters Geodatabase For The Modeling Assessment Of Agricultural Conservation Practices Effects In The United States, Mauro Di Luzio, Martin L. Norfleet, Jeffrey G. Arnold, Jimmy R. Williams, James R. Kiniry

International Journal of Geospatial and Environmental Research

Soil parameters for hydrology modeling in cropland dominated areas, from the regional to local scale, are part of critical biophysical information whose deficiency may increase the uncertainty of simulated conservation effects and predicting potential. Despite this importance, soil physical and hydraulic parameters lack common, wide-coverage repositories combined to digital maps as required by various hydrology-based agricultural water quality models.

This paper describes the construction of a geoprocessing workflow and the resultant hydrology-structured soil hydraulic, physical, and chemical parameters geographic database for the entire United States, named US-SOILM-CEAP. This database is designed to store a-priori values for a suit of models ...


Cover Crop Impacts On Soil Water Status, M. Kuykendall, K. Roozeboom, G. J. Kluitenberg, P. V. Vara Prasad 2015 Kansas State University

Cover Crop Impacts On Soil Water Status, M. Kuykendall, K. Roozeboom, G. J. Kluitenberg, P. V. Vara Prasad

Kansas Agricultural Experiment Station Research Reports

Water is a primary concern for producers in the Great Plains; as such, research is warranted to quantify how much cover crops affect the amount of soil water available to subsequent cash crops. Cover crop mixes have been marketed as a means to conserve water in no-till cropping systems following winter wheat (Triticum aestivum L.) harvest. The objectives of this study are to quantify changes in soil profile water content in the presence of different cover crops and mixtures of increasing species complexity, to quantify their biomass productivity and quality, and to quantify the impact of cover crops on subsequent ...


Corn Yield Response To Water Availability, T. Newell, K. Roozeboom, G. J. Kluitenberg, I. A. Ciampitti 2015 Kansas State University

Corn Yield Response To Water Availability, T. Newell, K. Roozeboom, G. J. Kluitenberg, I. A. Ciampitti

Kansas Agricultural Experiment Station Research Reports

Drought-tolerant technologies have become popular in hybrids for low-yielding corn environments across central and western Kansas and are marketed for their ability to produce higher grain yields with less water. The objective of this study was to compare water use, yield, and water use efficiency (WUE) of two types of drought-tolerant (DT) corn hybrids and a high-yielding non-DT hybrid. Water use and yield of two DT and one non-DT, high-yielding hybrid were compared in both dryland and irrigated situations. The average yield for the irrigated corn was 217 bu/a, and the average was 127 bu/a in dryland, representing ...


Historical Common Names Of Great Plains Plants, With Scientific Names Index. Volume Ii: Scientific Names Index, Elaine Nowick 2015 University of Nebraska-Lincoln

Historical Common Names Of Great Plains Plants, With Scientific Names Index. Volume Ii: Scientific Names Index, Elaine Nowick

Zea E-Books

Containing thousands of entries of both vernacular and scientific names of Great Plains plants, the literature that informs this exhaustive listing spans nearly 300 years. Author Elaine Nowick has drawn from sources as diverse as Linnaeus, Lewis and Clark, and local university extension publications to compile the gamut of practical, and often fanciful, common plant names used over the years. Each common name is accompanied by a definitive scientific name with references and authority information. Interspersed with scientifically-correct botanical line drawings, the entries are written in standard ICBN format, making this a useful volume for scholars as well as lay ...


Historical Common Names Of Great Plains Plants, With Scientific Names Index. Volume I: Common Names, Elaine Nowick 2015 University of Nebraska-Lincoln

Historical Common Names Of Great Plains Plants, With Scientific Names Index. Volume I: Common Names, Elaine Nowick

Zea E-Books

Containing thousands of entries of both vernacular and scientific names of Great Plains plants, the literature that informs this exhaustive listing spans nearly 300 years. Author Elaine Nowick has drawn from sources as diverse as Linnaeus, Lewis and Clark, and local university extension publications to compile the gamut of practical, and often fanciful, common plant names used over the years. Each common name is accompanied by a definitive scientific name with references and authority information. Interspersed with scientifically-correct botanical line drawings, the entries are written in standard ICBN format, making this a useful volume for scholars as well as lay ...


Breaking Soybean Yield Barriers: A Cropping Systems Approach, G. R. Balboa, I. A. Ciampitti 2015 Kansas State University

Breaking Soybean Yield Barriers: A Cropping Systems Approach, G. R. Balboa, I. A. Ciampitti

Kansas Agricultural Experiment Station Research Reports

Two soybean research trials were conducted at Scandia, KS, in dryland and irrigated environments. The objective of this trial was to study the contribution of different farming systems to developing efficient and high-yielding soybean production systems. Each experiment had five treatments: farmer practices (FP), comprehensive fertilization (CF), production intensity (PI), ecological intensification (CF + PI), and advanced plus (AD). Under dryland, FP and CF treatments yielded 34 bu/a, differing in 27 bu/a compared with PI, EI, and AD scenarios. Under irrigation, FP and CF presented comparable yield levels, differing by close to 36 bu/a compared with crop intensification ...


Balanced Nutrition And Crop Production Practices For Closing Grain Sorghum Yield Gaps, B. McHenry, P. V. Vara Prasad, I. A. Ciampitti 2015 Kansas State University

Balanced Nutrition And Crop Production Practices For Closing Grain Sorghum Yield Gaps, B. Mchenry, P. V. Vara Prasad, I. A. Ciampitti

Kansas Agricultural Experiment Station Research Reports

A field experiment was conducted at the North Central Kansas Experiment Field near Scandia, KS, in the summer of 2014 to evaluate diverse cropping systems approaches to closing sorghum yield gaps. Yield gaps can be understood as the difference between maximum and attainable on-farm yields. The approach taken in this project is system wide, rather than focusing on one factor and its interaction. The factors that were tested include narrow row spacing; plant population; balanced nutrition practices, including various timings of nitrogen, phosphorus, and potassium (NPK) and micronutrient applications; crop protection with fungicide and insecticide applications; plant growth regulator effects ...


Balanced Nutrition And Crop Production Practices For Closing Grain Sorghum Yield Gaps, B. McHenry, E. A. Adee, P. V. Vara Prasad, I. A. Ciampitti 2015 Kansas State University

Balanced Nutrition And Crop Production Practices For Closing Grain Sorghum Yield Gaps, B. Mchenry, E. A. Adee, P. V. Vara Prasad, I. A. Ciampitti

Kansas Agricultural Experiment Station Research Reports

A field experiment was conducted at the East Central Kansas Experiment Field near Ottawa, KS, and at the Kansas River Valley Experiment Field near Rossville, KS, in the summer of 2014 to evaluate diverse cropping systems approaches on closing sorghum yield gaps. Yield gaps can be understood as the difference between maximum yield and attainable on-farm yields. The factors that were tested include narrow row spacing; plant population; balanced nutrition practices, including various timings of nitrogen, phosphorus, and potassium (NPK) and micronutrient applications; crop protection with fungicide and insecticide applications; plant growth regulator effects; and the use of precision ag ...


Grain Sorghum Yield Response To Water Availability, J. P. Broeckelman, G. J. Kluitenberg, K. Roozeboom, I. A. Ciampitti 2015 Kansas State University

Grain Sorghum Yield Response To Water Availability, J. P. Broeckelman, G. J. Kluitenberg, K. Roozeboom, I. A. Ciampitti

Kansas Agricultural Experiment Station Research Reports

Yield effects of irrigation on sorghum and corn were compared, focusing only on the grain sorghum phase. Average water use for irrigation was 22 in., and dryland sorghum used 17 in. Average yields based on 12.5% grain moisture for dryland and irrigated sorghum were similar, with 138 bu/a for the irrigated and 142 bu/a for the dryland environment. Irrigated sorghum yields were similar, but in dryland, the Pioneer 84G62 hybrid yielded 149 bu/a, a 10 bu/a increase over Pioneer 84Y50 and DKS 53-67 hybrids, which yielded 139 bu/a and 138 bu/a, respectively. Although ...


Corn Response To Foliar-Applied Zinc Fertilizers, A. Lamb, N. O. Nelson 2015 Kansas State University

Corn Response To Foliar-Applied Zinc Fertilizers, A. Lamb, N. O. Nelson

Kansas Agricultural Experiment Station Research Reports

This study was conducted to determine corn response to three foliar-applied zinc sources. The study was conducted on dryland corn in Manhattan, KS, during the 2014 growing season. Yields were low as a result of very low precipitation during pollination and grain fill. There was no yield response to foliar-applied Zn; however, grain analysis show significant increases in grain Zn concentration from foliar-applied Zn. Foliar-applied Zn products are effective for increasing Zn uptake in corn. Additional studies need to be conducted to determine the yield response.


Corn Yield Response To Plant Populations, D. E. Shoup, E. A. Adee, I. A. Ciampitti 2015 Kansas State University

Corn Yield Response To Plant Populations, D. E. Shoup, E. A. Adee, I. A. Ciampitti

Kansas Agricultural Experiment Station Research Reports

Corn hybrid development with a focus on drought tolerance has emerged in recent years, and producers have questions about their yield performance across a range of plant populations. A two-year study was conducted to determine the yield of corn hybrids across several plant populations. Corn hybrids responded differently in 2013 and 2014. In 2013, a lower yield environment occurred. The hybrid with drought tolerance had the greatest yield of 95 bu/a at a plant population of 21,500 plants/a, whereas the non-drought-tolerant hybrid’s greatest yield was 90 bu/a at a plant population of 13,500 plants ...


Building Resilience Into Quaking Aspen Management, Paul C. Rogers 2015 Utah State University

Building Resilience Into Quaking Aspen Management, Paul C. Rogers

Aspen Bibliography

Throughout the 20th century, forest scientists and land managers were guided by principles of succession with regard to aspen forests. The historical model depicted aspen as a "pioneer species" that colonizes a site following disturbance and is eventually overtopped by conifers. Aspen systems are more diverse, however, than previously described. Not only are there distinctive seral and stable aspen, but variations within these types require appropriate management considerations (Rogers et al. 2014). We recommend a strategic approach to aspen resilience that builds upon traditional aspen ecology and incorporates knowledge of varying aspen functional types, effective monitoring, historical disturbance ecology ...


Managing Ungulate Browsing For Sustainable Aspen, Samuel B. St. Clair, Paul C. Rogers, Michael R. Kuhns 2015 Brigham Young University - Provo

Managing Ungulate Browsing For Sustainable Aspen, Samuel B. St. Clair, Paul C. Rogers, Michael R. Kuhns

Aspen Bibliography

In montane forests of the Intermountain West composition and function are often defined by what happens with quaking aspen. Aspen is a pioneer species that regenerates quickly following disturbance and then establishes ecological conditions under which the rest of the biological community develops. Quaking aspen forests have high biodiversity and provide ideal habitat for many animals. Aspen regeneration from root sprouts is highly palatable to wildlife and livestock. When browsing becomes chronic it leads to regeneration failure and eventual loss of aspen forests and associated species. Ironically, this can result in habitat and forage loss for wildlife and livestock. Here ...


Rangeland Monitoring Using Remote Sensing: An Assessment Of Vegetation Cover Comparing Field-Based Sampling And Image Analysis Techniques, Ammon K. Boswell 2015 Brigham Young University - Provo

Rangeland Monitoring Using Remote Sensing: An Assessment Of Vegetation Cover Comparing Field-Based Sampling And Image Analysis Techniques, Ammon K. Boswell

All Theses and Dissertations

Rangeland monitoring is used by land managers for assessing multiple-use management practices on western rangelands. Managers benefit from improved monitoring methods that provide rapid, accurate, cost-effective, and robust measures of rangeland health and ecological trend. In this study, we used a supervised classification image analysis approach to estimate plant cover and bare ground by functional group that can be used to monitor and assess rangeland structure. High-resolution color infrared imagery taken of 40 research plots was acquired with a UltraCam X (UCX) digital camera during summer 2011. Ground estimates of cover were simultaneously collected by the Utah Division of Wildlife ...


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