Physical Sciences and Mathematics Commons^™

Through The Eyes Of Locals: A Changing Climate In Bolivia, Jacob D. Rex

Undergraduate Theses, Professional Papers, and Capstone Artifacts

Deforestation and Agricultural Land-Use Change in Bolivia as a Function of Socio-Economic Realities.

This research combines semi-structured interviews of key informants and local participants, as well as field observations, which were conducted between January and April of 2019 in the Departments of Santa Cruz & Chuquisaca.

Seasonal Soil Carbon Fluxes In Transitioning Agricultural Soils In Central Washington State: Relations To Land-Use, Environmental Factors And Soil Carbon-Nitrogen Characteristics, Brandon Kautzman

All Master's Theses

Changing agricultural land-use practices to increase soil carbon sequestration contributes to climate change mitigation and improved food security by moving CO₂ from the atmosphere into soil as soil organic carbon (SOC). In 2016, a farm in Thorp, Washington, Spoon Full Farm, began converting land historically farmed using conventional methods of tillage and synthetic fertilizers to conservation farming methods with direct seeding and organic soil amendments with a goal of sequestering carbon in the soil. This project evaluates relationships of soil CO₂ respiration and net ecological exchange (NEE) with land-use types, seasonal environmental factors (air temperature, relative humidity, soil …

Conservation Agriculture In The Heartland: Farmer Perceptions Of Soil Health And The Adoption Of Cover Crops, Lillian Clarissa Cobo

Graduate Research Theses & Dissertations

The benefits of cover crops are widely recognized by those interested in conservation agriculture and soil health. These benefits include soil erosion control, nutrient loss reduction, and overall improvement of soil health. However, while these benefits are well-documented, the adoption rate of cover crops in the American Heartland remains astoundingly low. While some studies have attempted to determine the reasons for this low adoption rate, the information relating to how farmer perceptions of soil health impact cover crop adoption is almost nonexistent. Furthermore, there is a clear absence of mixed method studies in the literature relating to this subject. This …

A Quantitative Assessment Of Trace Metals In Subsurface Soils And Groundwater In Agricultural Fields Of El Paso, Texas, Emmanuel Sosa

Open Access Theses & Dissertations

Intensive agricultural practices such as irrigation, application of pesticides and the use of fertilizers, as well as contamination from urban settings and industrial activities contribute to the input of trace metals onto soils and groundwater. Consequentially, biological uptake and accumulation concentrate these toxic metals in fruits, vegetables, and grains that will be used for human consumption. In southern New Mexico and western Texas, cropland is developed along the Rio Grande valley. These farmers are concerned about the quality of their irrigation water and soils in order to produce adequate crops and maintain healthy soils to maximize revenue. To evaluate loading …

Ecosystem Services After A Major Ecological Disturbance: Did Barn Owl (Tyto Alba) Nest Box Occupancy And Hunting Habitat Selection Change In Response To Napa Valley Fires?, Allison E. Huysman

Cal Poly Humboldt theses and projects

Wine producers in Napa Valley, California install barn owl (Tyto alba) nest boxes in vineyards with the goal of reducing rodent crop damage. Previous research has shown that the probability of attracting barn owls to nest boxes and encouraging them to hunt in vineyards is strongly influenced by the design of the nest box itself and the composition of the surrounding landscape. In 2017, wildfires in the Napa area burned nearly 60,000 ha, primarily affecting urban areas, which caused human devastation, and uncultivated habitats, which barn owls are known to select. Data collected before the fires on nest …

Uas Flight Operations In Complex Terrain: Assessing The Agricultural Impact From Hurricane Maria In The Central Mountainous Region Of Puerto Rico, Kevin Adkins

Publications

Hurricane Maria struck Puerto Rico in September 2017 as a Category 4 storm causing major damage to infrastructure, agriculture and natural ecosystems, as well as the loss of many lives. Among the crops hardest hit was coffee, one of the most important crops in Puerto Rico. As a perennial system, coffee takes various production forms along a gradient from high shade/biodiversity coffee farms to low shade coffee monocultures and therefore offers an ideal means for the study of resistance and resilience of an agroecosystem to weather and climate disturbance. During the summer of 2018, 14 impacted farms across the production …

Following The Seed: Investigating Seed Saving And Network Creation In The Appalachian Region Of Southeastern Ohio, Molly Hicks

Antioch University Dissertations & Theses

Since the beginning of agriculture, seeds have been cultivated, saved, and exchanged by farmers each year to ensure the success of future crops adapted to local environments. Yet, over ninety percent of our diverse vegetable and fruit crop varieties have been lost due to the industrialization and commercialization of seeds. Industrial agriculture has caused a great homogenization of crop varieties, but locally adapted seeds and their seed savers do still exist on the fringe, and across the world. There is a small but growing body of research on agri-food networks in Western and developing countries where advocates are working to …

1998 - Salinas Valley Water (Preliminary Analysis Of) The Cause And Cost Of Seawater Intrusion

Miscellaneous Monterey and San Luis Obispo County Documents and Reports

An analysis of the historical cause of seawater intrusion in the Pressure Area of Monterey County. An annual overdraft of groundwater resources near the coast coupled with a seasonal cycle of over pumping created a reversal in the groundwater gradient and associated cones of depression. "Marine intrusion has occurred in the 180-foot aquifer in recent years as a result of overdrafts." (Bulletin 52, 1946, p.27). The only overdrafts on groundwater in the Salinas Valley were in the East Side and Pressure Areas. "There was no shortage of groundwater in the remainder of the basin and no threat of deficiency under …

2018 - Groundwater Management In California, Michael Hanemann

Related Research and Documents

In 2014, the California legislature for the first time took some steps to create a framework for regulating groundwater pumping in over-drafted basins by adopting the Sustainable Groundwater Management Act (SGMA), representing California's first statewide groundwater management planning program. SGMA called for local agencies to develop groundwater sustainability plans within the next five to seven years and then achieve sustainable levels of groundwater extraction by approximately 2040 to 2045. California's prior efforts to regulate groundwater extraction is discussed, as well as groundwater depletion.

Seasonality Of Nitrogen Balances In A Mediterranean Climate Watershed, Oregon, Us, Jiajia Lin, Jana E. Compton, Scott G. Leibowitz, George Mueller-Warrant, William Matthews, Stephen H. Schoenholtz, Daniel M. Evans, Rob A. Coulombe

United States Environmental Protection Agency: Publications

We constructed a seasonal nitrogen (N) budget for the year 2008 in the Calapooia River Watershed (CRW), an agriculturally dominated tributary of the Willamette River (Oregon, U.S.) under Mediterranean climate. Synthetic fertilizer application to agricultural land (dominated by grass seed crops) was the source of 90% of total N input to the CRW. Over 70% of the stream N export occurred during the wet winter, the primary time of fertilization and precipitation, and the lowest export occurred in the dry summer. Averaging across all 58 tributary subwatersheds, 19% of annual N inputs were exported by streams, and 41% by crop …

Can Farmers Adapt To Higher Temperatures? Evidence From India, Vis Taraz

Economics: Faculty Publications

Projections suggest that the damages from climate change will be substantial for developing countries. Understanding the ability of households in these countries to adapt to climate change is critical in order to determine the magnitude of the potential damages. In this paper, I investigate the ability of farmers in India to adapt to higher temperatures. I use a methodology that exploits short-term weather fluctuations as well as spatial variation in long-run climate. Specifically, I estimate how damaging high temperatures are for districts that experience high temperatures more or less frequently. I find that the losses from high temperatures are lower …

The Power Law Distribution Of Agricultural Land Size, Lauren Chamberlain

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This paper demonstrates that the distribution of county level agricultural land size in the United States is best described by a power-law distribution, a distribution that displays extremely heavy tails. This indicates that the majority of farmland exists in the upper tail. Our analysis indicates that the top 5% of agricultural counties account for about 25% of agricultural land between 1997-2012. The power-law distribution of farm size has important implications for the design of more efficient regional and national agricultural policies as counties close to the mean account for little of the cumulative distribution of total agricultural land. This has …

Ncer Assistance Agreement Annual Progress Report For Grant #83582401 - Assessment Of Stormwater Harvesting Via Manage Aquifer Recharge (Mar) To Develop New Water Supplies In The Arid West: The Salt Lake Valley Example, Ryan Dupont, Joan E. Mclean, Richard C. Peralta, Sarah E. Null, Douglas B. Jackson-Smith

Civil and Environmental Engineering Faculty Publications

The goals of the original proposed project remain the same, that is, to test the hypothesis that Managed Aquifer Recharge (MAR) for stormwater harvesting is a technically feasible, socially and environmentally acceptable, economically viable, and legally feasible option for developing new water supplies for arid Western urban ecosystems experiencing increasing population, and climate change pressures on existing water resources. The project is being carried out via three distinct but integrated components that include: 1) Monitoring of existing distributed MAR harvesting schemes involving a growing number of demonstration Green Infrastructure (GI) test sites; 2) Integrated stormwater/vadose zone/groundwater/ ecosystem services modeling; and …

Quantitative Appraisal Of Non-Irrigated Cropland In South Dakota, Shelby Riggs

Honors Program: Senior Projects (Public)

This appraisal attempts to remove subjectivity from the appraisal process and replace it with quantitative analysis of known data to generate a fair market value of the subject property. Two methods of appraisal were used, the income approach and the comparable sales approach. For the income approach, I used the average cash rent for the region, the current property taxes for the subject property, and a capitalization rate based on Stokes' (2018) capitalization rate formula to arrive at my income-based valuation. For the comparable sales approach, I utilized Stokes' (2018) research in optimization modeling to estimate a market value for …

T12s, R3e, Blm Plat_321219_1 - Nov. 10, 1886 Survey

Township and Range Surveys - BLM

A Nov. 10, 1886, survey or plat reflecting the Township, Range and Sections of T12S, R3E, located in Monterey County, California, USA

T12s, R4e, Blm Plat_320707_1 - Apr. 29, 1867, Later Part Of San Benito County Survey

Township and Range Surveys - BLM

A Apr. 29, 1867, survey or plat reflecting the Township, Range and Sections of T12S, R4E, located in Monterey County, California, USA

T13s, R2e, Blm Plat_321083_1 - Nov. 21, 1883, Lots 1 & & Added As Swamp Land Totally 1,599.42 Acres Survey

Township and Range Surveys - BLM

A Nov. 21, 1883, survey or plat reflecting the Township, Range and Sections of T13S, R2E, located in Monterey County, California, USA

T13s, R2e, Blm Plat_321081_1 - Mar. 30, 1880, Dispute Over Lot 38, Part Of Rancho Rincon De Las Salinas Survey

Township and Range Surveys - BLM

A Mar. 30, 1880, survey or plat reflecting the Township, Range and Sections of T13S, R2E, located in Monterey County, California, USA

T13s, R2e, Blm Plat_321075_1 - May 14, 1867, Showing Tide Land On Elk Horn Slough Survey

Township and Range Surveys - BLM

A May 14, 1867, survey or plat reflecting the Township, Range and Sections of T13S, R2E, located in Monterey County, California, USA

T12s, R1e, Blm Plat_315531_1 - June 16, 1886, Reflecting Slough Cienega, Marsh & Sand Bluffs North Of The Mouth Of Pajaro River Survey

Township and Range Surveys - BLM

A June 16, 1886, survey or plat reflecting the Township, Range and Sections of T12S, R1E, located in Monterey County, California, USA

T12s, R3e, Blm Plat_321213_1 - July 19, 1867 Survey

Township and Range Surveys - BLM

A July 19, 1867, survey or plat reflecting the Township, Range and Sections of T12S, R3E, located in Monterey County, California, USA

T13s, R3e, Blm Plat_321221_1 - July 19, 1867 Survey

Township and Range Surveys - BLM

A July 19, 1867, survey or plat reflecting the Township, Range and Sections of T13S, R3E, located in Monterey County, California, USA

T13s, R4e, Blm Plat_320711_1 - Apr. 24, 1867 Survey

Township and Range Surveys - BLM

A Apr. 24, 1867, survey or plat reflecting the Township, Range and Sections of T13S, R4E, located in Monterey County, California, USA

T12s, R2e, Blm Plat_321073_1 - Aug. 31, 1872, All Of Elkhorn Slough Now Swamp & Overflowed Lands, 980 Acres Survey

Township and Range Surveys - BLM

A Aug. 31, 1872, survey or plat reflecting the Township, Range and Sections of T12S, R2E, located in Monterey County, California, USA

T13s, R1e, Blm Plat_315533_1 - Jan. 7, 1929, Feb. 23, 1929, Showing Pajaro Valley Consolidated R.R. (Narrow Gauge) Survey

Township and Range Surveys - BLM

A Feb. 23, 1929, survey or plat reflecting the Township, Range and Sections of T13S, R1E, located in Monterey County, California, USA

T13s, R2e, Blm Plat_321077_1 - Aug. 28, 1872, Elk Horn Slough Now Shown As Swamp & Overflowed Land, 1,583.73 Acres Survey

Township and Range Surveys - BLM

A Aug. 28, 1872, survey or plat reflecting the Township, Range and Sections of T13S, R2E, located in Monterey County, California, USA

T12s, R2e, Blm Plat_321069_1 - July 19, 1867, Reflecting Elkhorn Slough As Tide Land Up To Portion Of Sec. 27 To Sec. 25 Shown As Swamp & Overflowed Land Survey

Township and Range Surveys - BLM

A July 19, 1867, survey or plat reflecting the Township, Range and Sections of T12S, R2E, located in Monterey County, California, USA

T17s, R7e, Blm Plat_319852_1 - Nov. 22, 1882 Survey

Township and Range Surveys - BLM

A Nov. 22, 1882, survey or plat reflecting the Township, Range and Sections of T17S, R7E, located in Monterey County, California, USA

T14s, R6e, Blm Plat_319825_1 - Feb. 28, 1883, Amendment Returning Lot 4 Of Sec. 17 & Fractional E 1/2 Of N.E. To Sec. 20 As Swamp & Overflowed Land Survey

Township and Range Surveys - BLM

A Feb. 28, 1883, survey or plat reflecting the Township, Range and Sections of T14S, R6E, located in Monterey County, California, USA

T16s, R5e, Blm Plat_320834_1 - Nov. 21, 1868 Survey

Township and Range Surveys - BLM

A Nov. 21, 1868, survey or plat reflecting the Township, Range and Sections of T16S, R5E, located in Monterey County, California, USA