Lisa Holden

Pennsylvania State University

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Piotr Bórawski

University of Warmia and Mazury in Olsztyn

Aneta Bełdycka-Bórawska

University of Warmia and Mazury in Olsztyn

L.D. Muller

Université de Picardie Jules Verne

Tomasz Rokicki

Warsaw University of Life Sciences

Andrzej Parzonko

Warsaw University of Life Sciences

Jeffrey Hyde

Agricultural & Applied Economics Association

K.J. Soder

Agricultural Research Service

Marco Fatuzzo

Xavier University

Richard E. Stup

Cornell University

G.A. Varga

Budapest University of Technology and Economics

Cooperative Institutions

Pennsylvania State University

Agricultural Research Service

Northern Kentucky University

University of Warmia and Mazury in Olsztyn

Warsaw University of Life Sciences

Bridge University

United States Department of Agriculture

University of Birmingham

Cornell University

Higher School of Agribusiness

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Comparison of Methods of In Vitro Dry Matter Digestibility for Ten Feeds

Journal of Dairy Science (1999)

Lisa Holden

The objectives were to determine if the in vitro dry matter (DM) digestibility was similar by using a traditional method compared to the new DAISY II system and to determine if in vitro DM digestibility was similar for sources of inoculum from two different donor cow diets, all forage or total mixed ration.Ten feeds were digested by the traditional method, the DAISY II method with same feeds in a digestion vessel, and the DAISY II method with different feeds in a digestion vessel.The study used a 2 × 3 factorial arrangement of treatments with two sources of inoculum and three methods.The study was replicated.Source of inoculum affected in vitro DM digestibility; the grass hay donor cow diet resulted in lower digestibility values in six of the 10 feeds tested.Method did not significantly affect the digestibility values, and there were no significant source by method interactions.The DAISY II method can be used to increase labor efficiency in the in vitro DM digestibility analysis, and forages and grains can be analyzed together in a single digestion vessel.

Digestion

10.3168/jds.s0022-0302(99)75409-3

Cite

Citations (464)

Dry Matter Intake and Milk Yield and Composition of Cows Fed Yeast Prepartum and Postpartum

Journal of Dairy Science (1999)

K.J. Soder Lisa Holden

Allantoin

Silage

Total mixed ration

Latin square

10.3168/jds.s0022-0302(99)75273-2

Cite

Citations (81)

Development of Oil Industry in Poland in the Context of the European Union

Foods (2024)

Aneta Bełdycka-Bórawska Piotr Bórawski Lisa Holden Tomasz Rokicki

Oil industry is developing well in Poland. This study aimed to examine the development of the Polish oil industry after joining the European Union. The following questions were asked: What were the changes in the consumption of vegetable oils in Poland after EU enlargement in 2004? How did the production of vegetable oil change in Poland after EU enlargement in 2004? And has the liquidity of the Polish oil industry changed after EU enlargement in 2004? First, the changes in the oil industry were evaluated. This research proved the development of the fat industry. We used the regression model to analyze the impact of chosen factors on the economic situation of the oil industry in Poland. Rapeseed is the main source of oil for the edible oil and biodiesel industry. High prices of rapeseed increased the sown area of rapeseed. The production of crude rapeseed oil changed from 520.1 thousand tons in 2005 to 1440 thousand tons in 2023. Biofuels made from rapeseed oils are called first generation. Poland's production of refined rapeseed oil changed from 386.5 thousand tons in 2005 to 541 thousand tons in 2023. These numbers confirm the development of edible oil and biofuel production. The gross profit increased from PLN 133 mln in 2005 to PLN 443.8 mln in 2023. The net profit of the fat industry increased from PLN 110 mln in 2005 to PLN 381.6 mln in 2023. The oil industry is characterized by high investment, which reached the level of PLN 232.9 mln in 2023. The investment rate in 2023 was PLN 1.96 %. The changes observed in the rapeseed market after Poland joined the EU affected the performance of vegetable oil and biofuel producers. The regression analysis proved the hypothesis that the monthly consumption of rapeseed oil is the main factor influencing the oil industry situation in Poland. The oil industry is important to the development of the whole economy. Particular attention should be paid to current liquidity, which is why a constant supply of money from sold oil and biodiesel is needed to cover costs.

10.3390/foods13213406

Cite

Citations (0)

Lymphocyte Proliferation Response of Lactating Dairy Cows Fed Varying Concentrations of Rumen-Protected Methionine

Journal of Dairy Science (1999)

K.J. Soder Lisa Holden

Latin square

Silage

Somatic Cell Count

10.3168/jds.s0022-0302(99)75429-9

Cite

Citations (28)

Factors Shaping Cow’s Milk Production in the EU

Sustainability (2020)

Piotr Bórawski Adam Pawlewicz Andrzej Parzonko K. Harper Jayson Lisa Holden

The milk market in the European Union (EU) is adjusting rapidly to the removal of dairy quotas. The most important changes include increased milk yield per cow, increased total milk production, decreased number of cows, and the decreased milk consumption. The main aim of the paper is to examine the milk production changes in the EU. We investigated the dynamics of changes in farm milk production during the period from 1998–2017 in the EU. Moreover, we investigated the impact of the removal of quotas on the production of milk on farms in the EU countries for the period from 2015–2017. Milk production in the EU increased from 151 million tons in 1998 to 165 million tons in 2017 (a 10% increase). A multi-variate regression model was to test which explanatory variables have an impact on milk production in the EU. The most important factors were a gross domestic product, final household consumption expenditure (current prices, million euro), and population (number).

Consumption

10.3390/su12010420

Cite

Citations (56)

Publications of the Astronomical Society of the Pacific (2009)

Lisa Holden Kevin Hoppins Benjamin Baxter Marco Fatuzzo

A self-similar formalism for the study of the gravitational collapse of molecular gas provides an important theoretical framework from which to explore the dynamics of star formation. Motivated by the presence of elongated and filamentary structures observed in giant molecular clouds, we build upon the existing body of work on cylindrical self-similar collapse flows by including dynamic equations of state that are different from the effective equation of state that produces the initial density distribution. We focus primarily on the collapse of initial states for which the gas is at rest and everywhere overdense from its corresponding hydrostatic equilibrium profile by a factor Λ and apply our results toward the analysis of star formation within dense, elongated molecular cores. An important aspect of this work is the determination of the mass infall rates over a range of the parameters that define the overall state of the gas—the overdensity parameter Λ, the index Γ of the static equation of state, and the index γ of the dynamic equation of state. While most of the parameter space explored in this work leads to solutions for which the underlying equations do not become singular, we do include a discussion on how to treat cases for which solutions pass smoothly through the singular surface. In addition, we also present a different class of collapse solutions for the special case γ = 1.

Hydrostatic equilibrium

Formalism (music)

10.1086/599382

Cite

Citations (9)

Effects of Alfalfa and Orchardgrass on Digestion by Dairy Cows

Journal of Dairy Science (1994)

Lisa Holden B.P. Glenn R.A. Erdman William E. Potts

Digestion

Dactylis glomerata

Alfalfa hay

Neutral Detergent Fiber

10.3168/jds.s0022-0302(94)77199-x

Cite

Citations (27)

Factors Shaping Performance of Polish Biodiesel Producers Participating in the Farm Accountancy Data Network in the Context of the Common Agricultural Policy of the European Union

Energies (2022)

Aneta Bełdycka-Bórawska Piotr Bórawski Lisa Holden Tomasz Rokicki Bogdan Klepacki

The aim of this study was to present factors shaping biodiesel production in Poland influenced by the Common Agricultural Policy (CAP) of the European Union (EU). The performance of Polish biodiesel producers was analyzed. A regression model was built to identify the factors that impacted biodiesel production in Poland. The Farm Accountancy Data Network (FADN) was the main source of information about Polish biodiesel farmers. The FADN is the most comprehensive and detailed source of economic and agricultural data in Poland. Changes in the number of biodiesel producers in the Polish market were analyzed with the use of indicators. In the last stage of the study, the impact of selected variables on the performance of rapeseed farms was determined in a regression analysis. The second source of information was Eurostat data, which provided information about pure biodiesel production in the European Union (EU) countries from 2004 to 2019. The biggest producers of pure biodiesel in the European Union are Germany, France, Spain, and Italy. Poland is also an important producer of biodiesel in the European Union (EU). Both descriptive statistics and statistical analyses are presented. First, we used descriptive statistics to present changes in pure biodiesel production in the European Union. Second, we used statistical analyses to present factors shaping the economic performance of biodiesel producers in Poland. The study demonstrated that the number of rapeseed producers in Poland has increased and that farm performance has improved during the period analyzed. Rapeseed farms have increased their land area and the value of fixed and current assets. The land area under rapeseed cultivation has increased after Poland joined the EU, which suggests a positive response to a growing demand for biofuels.

Common Agricultural Policy

10.3390/en15197400

Cite

Citations (14)

Survey results from users of a dairy management web site

The Journal of Extension (2000)

Robert C. Walker Lisa Holden

Web site

Web survey

Source

Cite

Citations (2)

An Investigation of the Loss of Planet-Forming Potential in Intermediate-Sized Young Embedded Star Clusters

Publications of the Astronomical Society of the Pacific (2011)

Lisa Holden Edward Landis Jeremy Spitzig Fred C. Adams

A large fraction of stars forming in our galaxy are born within clusters embedded in giant molecular clouds. In these environments, the background UV radiation fields impinging upon circumstellar disks can often dominate over the radiation fields produced by each disk's central star. As a result, this background radiation can drive the evaporation of circumstellar disks and lead to the loss of planet-forming potential within a cluster. This article presents a detailed analysis of this process for clusters whose stellar membership falls within the range of 100 ≤ N ≤ 1000. For these intermediate-sized clusters, the background UV field is often dominated by the most massive stellar member. Due to the steep slope of the initial mass function, the amount of background UV light that bathes clusters of similar size displays significant variance. As a result, we perform a statistical analysis of this problem by calculating distributions of FUV flux values impinging upon star/disk systems for several cluster scenarios. We find that in the absence of dust attenuation, giant planet formation would likely be inhibited in approximately half of the systems forming within intermediate-sized clusters, regardless of stellar membership. In contrast, the presence of dust can significantly lower this value, with the effect considerably more pronounced in more populated clusters.

10.1086/658081

Cite

Citations (19)