|
|
|
| Registros recuperados: 26 | |
|
|
| Ippolito, J.A.; Levine, Jonah; Williams, Morgan. |
| One major issue related to climate change is the potential to improve soil water relations in light of changes in future precipitation patterns or reductions in water availability in drier portions of the world (such as the western US). It appears that biochar may play a positive role, but that role may be soil texture related. We performed a study with a sandy (Wolverine sand from Shelley, ID), silty (Portneuf silt loam from Kimberly, ID), and clay loam soil (Danville clay loam from a subsurface horizon, from near Oakland, CA) that received either 5 or 10% by volume of lodgepole biochar in either chipped (0.25-0.63”) or fine (0-0.25”) form; a control (no biochar) was also included. Soil-biochar treatments were evenly mixed and placed into containers,... |
| Tipo: Article |
Palavras-chave: Soil water (soil moisture); Soil. |
| Ano: 2015 |
URL: http://eprints.nwisrl.ars.usda.gov/1610/1/1567.pdf |
| |
|
|
| Novak, J.M.; Busscher, W.J.; Watts, D.W.; Amonette, J.; Ippolito, J.A.; Lima, I.M.; Gaskin, J.; Das, K.C.; Steiner, C.; Ahmedna, M.; Rehrah, D.; Schomberg, H.H.. |
| Droughts associated with low or erratic rainfall distribution can cause detrimental crop moisture stress. This problem is exacerbated in the USA’s arid western and southeastern Coastal Plain due to poor rainfall distribution, poor soil water storage, or poorly-aggregated, subsurface hard layers that limit root penetration. We hypothesized that soil physical deficiencies may be improved by biochar applications. Research indicates a single biochar will not serve as a universal supplement to all soils; consequently, biochars may need to be designed with physico-chemical properties that can ameliorate specific soil physical deficiencies. We conducted a laboratory study that examined the effect of biochar on soil moisture retention and aggregate formation.... |
| Tipo: Article |
Palavras-chave: Soil quality; Soil water (soil moisture). |
| Ano: 2012 |
URL: http://eprints.nwisrl.ars.usda.gov/1523/1/1485.pdf |
| |
|
|
| King, B.A.; Winward, T.W.; Bjorneberg, D.L.. |
| Kinetic energy of water droplets has a substantial effect on development of a soil surface seal and infiltration rate of bare soil. Methods for measuring sprinkler droplet size and velocity needed to calculate droplet kinetic energy have been developed and tested over the past 50 years, each with advantages, disadvantages, and limitations. A laser precipitation meter and photographic method were used to measure droplet size and velocity from an impact sprinkler at three pressures and one nozzle size. Significant differences in cumulative volume drop size distributions derived from the two measurement methods were found, especially at the highest operating pressure. Significant differences in droplet velocities were found between measurement methods as... |
| Tipo: Conference or Workshop Item |
Palavras-chave: Sprinkler irrigation; Soil water (soil moisture); Water management. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1577/1/1533.pdf |
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Jensen, M.E.; Sletten, W.H.. |
| In 1956 and 1957 grain sorghum represented 37 percent of the harvested crop acreage in Texas. The largest concentrated area of sorghum is in the High Plains where the proportion of sorghum irrigated increased greatly during the drought years of the 1950's. In 1959 the monetary value of irrigated grain sorghum was estimated to be about $100 million. As reported by the U.S. Census of Agriculture the acreages of irrigated grain sorghum harvested in the 42-county High Plains area in 1950, 1954, and 1959 were 387,000, 1 1 006,000, and 1,224,000 acres, respectively. The irrigated grain sorghum acreage in the eight counties—Castro, Deaf Smith, Floyd, Hale, Lamb, Lubbock, Farmer, and Swisher—represented over 80 percent of the total in the High... |
| Tipo: Technical Bulletin |
Palavras-chave: Sorghum; Soil water (soil moisture); Fertilizer; Chemistry; Evapotranspiration; Mass Import - autoclassified (may be erroneous). |
| Ano: 1965 |
URL: http://eprints.nwisrl.ars.usda.gov/1136/1/25.pdf |
| |
|
|
| Jensen, M.E.; Sletten, W.H.. |
| Irrigated and dry/and winter wheat is one of the major crops produced in the High Plains of Texas. As reported by the U.S. Census of Agriculture the acreages of irrigated wheat harvested in the High Plains in 1950, 1954, and 1959 were 133,000, 179,000 and 380,000 acres, respectively. Additional irrigated wheat is used only for grazing purposes. The major part of the irrigated winter wheat harvested in the mid-1950's was in Castro, Deaf Smith, Floyd, Hale, Parmer, and Swisher Counties. The soils in these counties consist mostly of clay looms and silty clay loams. Continued expansion in irrigated wheat acreage has occurred since 1959, especially north of the Canadian River. |
| Tipo: Technical Bulletin |
Palavras-chave: Small grain; Soil water (soil moisture); Fertilizer; Chemistry; Evapotranspiration; Mass Import - autoclassified (may be erroneous). |
| Ano: 1965 |
URL: http://eprints.nwisrl.ars.usda.gov/1141/1/21.pdf |
| |
|
|
| Zhang, T.C.; Ma, Rui; Bartelt-Hunt, S.L.; Qi, Yong; Kranz, W.L.; Snow, D.D.; Mader, T.L.; Shapiro, C.A.; Shelton, D.P.; Van Donk, S.J.; Tarkalson, D.D.. |
| In this study, batch sorption and desorption experiments were conducted for testosterone using four agricultural soils and five clay minerals. Significant differences in sorption behavior were observed between abiotic and biotic systems. The Freundlich sorption coefficient Kf (µg per g)/(µg per mL) ranged from 8.53 to 74.46 for soils and from 35.28 to 1243 for clays. The maximum sorption capacity (µg per g) of soils ranged from 25.25 to 440.61 for soils and 168.46 to 499.84 for clays. Correlation of sorption model parameters with soil properties indicated that both clay content and soil organic matter are important variables in predicting testosterone sorption behavior. Observed testosterone desorption from agricultural soils ranged from approximately 14... |
| Tipo: Article |
Palavras-chave: Soil water (soil moisture); Soil; Water. |
| Ano: 2015 |
URL: http://eprints.nwisrl.ars.usda.gov/1606/1/1564.pdf |
| |
|
| |
| Registros recuperados: 26 | |
|
|
|
