Life Sciences Commons^™

Econometric Estimation Of Groundwater Depth Change For The High Plains Aquifer, Jonathan R. Sims

Department of Agricultural Economics: Dissertations, Theses, and Student Research

This article presents a new method for estimating changes in depth to groundwater at a yearly, county level and incorporates these estimates as the dependent variable of econometric models for the High Plains aquifer. The High Plains (Ogallala) aquifer underlies eight states in the central United States and is the primary source of irrigation water for this large food producing region. The stock of groundwater is a finite, non-renewable resource with minimal recharge in most areas. Many fields of study, including hydrology and agricultural economics, are interested in depth to groundwater changes because they serve as a proxy for estimating …

Drip Irrigation For Commercial Vegetable And Fruit Production, Tiffany Maughn, Niel Allen, Dan Drost

All Current Publications

Drip irrigation is a highly efficient irrigation method well suited to many fruit and vegetable row crops. Drip tubing or tape discharges water to the soil through emitters positioned close to the plant. The drip tubing can be placed uncovered on the soil surface, under plastic mulch, buried in the soil, or suspended above the ground (e.g., on a trellis system). Water application rate is relatively low and irrigations are usually frequent. Properly designed and maintained drip-irrigation systems can have benefits that help increase the profitability of crop production.

1900 - Conceptual And Historical 1900 Land Use And Development In Salinas Valley And Vicinity [Draft]

Groundwater Basin Maps

A digitized map created in 2017 representing land use and development in the Salinas Valley and vicinity in 1900. The map reflects private rancho; high probability of harming and Irrigation areas; land suitable for grazing cattle, sheep and horses with some agriculture; California native habitat (least developed lands); canals; railroads; pump houses, oil seep, population centers; 1898 USGS Monterey County Road & Historic El Camino Real; Salinas River Watershed; Township and Range; County boundary; historic Mission sites; springs; wetland, sloughs and lakes; intermittent stream or slough; Salinas River; as well as rivers and streams. Data sources include Bureau of Land …

1931 - California - An Index To The State Sources Of Agricultural Statistics, Part Iv – Land, Farm Property, Irrigation, And Miscellaneous Items

Miscellaneous Documents and Reports

Part IV of five volumes, this 1931 index of California agricultural statistics and reports pertaining to land, farm property, irrigation and miscellaneous items largely covers the period of 1905 through 1927. The index was prepared by the Library of the United States Bureau of Agricultural Economics in cooperation with the College of Agriculture of the University of California.

2003, April – Land Use History And Mapping In California’S Central Coast Region; Report No. Wi-2003-03; Newman, W. B, Watson, F.G.R,

Miscellaneous Monterey and San Luis Obispo County Documents and Reports

Land use change has a long history in the region, which once held the State Capitol at Monterey. The region been transformed several times, following the introduction of Europeans and their grain crops in the 1800s, the development of groundwater-based irrigation in the late 1920s, and the expansion of vineyards and urban areas in more recent years.

Land management must be aware of the history of the land, and of its current spatial state. The early chapters of this report review the major land use systems of the region and their history. The latter chapter presents a new remotely sensed …

Irrigation And Tillage Management Effects On Canopy Formation In Corn, R. M. Aiken, F. Lamm, A. A. Aboukheira

Kansas Agricultural Experiment Station Research Reports

Effects of canopy formation and function are frequently represented in irrigation management models by crop coefficients, which can be used to calculate expected crop water requirements. Soil tillage alters the micro-environment of a developing corn canopy. The objective of this study was to evaluate irrigation capacity and tillage effects on seasonal changes in maize canopy and above-ground biomass productivity. Leaf area index (LAI) and above-ground biomass (AGB) were quantified by non-destructive methods during four growing seasons for corn under two irrigation capacities (1 in./4 days or 1 in./8 days) and three tillage regimes (no-tillage (NT), strip tillage (ST), or conventional …

Irrigated Sunflowers In Northwest Kansas: Productivity And Canopy Formation, F. Lamm, R. M. Aiken, A. A. Aboukheira, G. J. Seiler

Kansas Agricultural Experiment Station Research Reports

Sunflower was grown in a three-year study (2009, 2010, and 2012) at the Kansas State University Northwest Research-Extension Center at Colby, KS, under a lateral move sprinkler irrigation system. Irrigation capacities were limited to no more than 1 inch every 4, 8, or 12 days but were scheduled only as needed as determined with a weather-based water budget. Achene (sunflower seed) yields and oil yield generally plateaued at the medium irrigation level. Dormant preseason irrigation increased achene yield and oil yield by 2% with most of this increase occurring in the extreme drought year, 2012. The optimum harvest plant population …