| residual concentrations of propanil, tcab, and other pesticides in rice-growing of soils in the united states, 1972. | ninety-nine soil samples from the rice-growing states of arkansas, california, louisiana, mississippi, and texas were collected, primarily to monitor the herbicide propanil. no residual concentrations of propanil were detected in any of these samples, but tcab, a propanil transformation product, was detected in six samples at concentrations ranging from 0.01 ppm to 0.05 ppm. organochlorine and organphosphorus pesticide determinations were also performed. the compounds dieldrin, aldrin, and ddt a ... | 1980 | 7422467 |
| biotechnology. retreat from torrey mesa: a chill wind in ag research. | | 2002 | 12481105 |
| estimating annual soil carbon loss in agricultural peatland soils using a nitrogen budget approach. | around the world, peatland degradation and soil subsidence is occurring where these soils have been converted to agriculture. since initial drainage in the mid-1800s, continuous farming of such soils in the california sacramento-san joaquin delta (the delta) has led to subsidence of up to 8 meters in places, primarily due to soil organic matter (som) oxidation and physical compaction. rice (oryza sativa) production has been proposed as an alternative cropping system to limit som oxidation. preli ... | 2015 | 25822494 |
| hot tea and juk: the institutional meaning of food for chinese elders in an american nursing home. | this qualitative study describes how chinese elders in an american nursing home perceived their food and mealtime experiences. data collection included 20 meal observations and interviews with 7 residents, 9 family members, and 17 staff members. field notes and interviews were coded and analyzed using an iterative approach similar to grounded theory. all participant groups described institutional food and meals as individualized, nutritious therapy for medical illnesses. mealtimes lacked sociabi ... | 2008 | 19024429 |
| market basket survey shows elevated levels of as in south central u.s. processed rice compared to california: consequences for human dietary exposure. | we report the largest market basket survey of arsenic (as) in u.s. rice to date. our findings show differences in transitional-metal levels between polished and unpolished rice and geographical variation in as and selenium (se) between rice processed in california and the south central u.s. the mean and median as grain levels for the south central u.s. were 0.30 and 0.27 mimcrog as g(-1), respectively, for 107 samples. levels for california were 41% lower than the south central u.s., with a mean ... | 2007 | 17438760 |
| being at the right place, at the right time, for the right reasons--plant pathology. | this article relates some personal history and influences leading to becoming a plant pathologist. next a summary of my research experiences on rice and barley diseases and the effect of regulatory changes on efforts to manage rice diseases in california. i conclude with an invitation to consider the opportunities and obligations of plant pathologists to return to the field and for individual introspection regarding attitudes and behavior toward colleagues and factors affecting our profession. | 2005 | 16078874 |
| the efficacy of bacillus thuringiensis spp. galleriae against rice water weevil (coleoptera: curculionidae) for integrated pest management in california rice. | rice water weevil (lissorhoptrus oryzophilus kushel) is the most damaging insect pest of rice in the united states. larval feeding on the roots stunt growth and reduce yield. current pest management against the weevil in california relies heavily on pyrethroids that can be damaging to aquatic food webs. examination of an environmentally friendly alternative biopesticide based on bacillus thuringiensis spp. galleriae chemistry against rice water weevil larvae showed moderate levels of activity in ... | 2015 | 26470102 |
| seasonal losses of dissolved organic carbon and total dissolved solids from rice production systems in northern california. | water quality concerns have arisen related to rice (oryza sativa l.) field drain water, which has the potential to contribute large amounts of dissolved organic carbon (doc) and total dissolved solids (tds) to the sacramento river. field-scale losses of doc or tds have yet to be quantified. the objectives of this study were to evaluate the seasonal concentrations of doc and tds in rice field drain water and irrigation canals, quantify seasonal fluxes and flow-weighted (fw) concentrations of doc ... | 2015 | 20048318 |