In a Single Project On Phosphorus Management > 자유게시판

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McKean, Erin, ed. (2003), The Oxford Essential Dictionary of recent Words, Berkeley, p. Dickson, Paul (2006), Slang; The topical dictionary of Americanisms, Walker & Company, p. Breitenstein, Jeff; Paiva, Troy (2004), Ultimate Hot Rod Dictionary, MotorBooks/MBI Publishing Company, p. Green, Jonathon (2005), Cassell's Dictionary of Slang (2nd ed.), Sterling Publishing Company, p. Dalzell, Tom; Victor, Terry (2007), The concise new Partridge dictionary of slang and unconventional English, Routledge, p. Dalzell, Tom; Victor, Terry (2007), The concise new Partridge dictionary of slang and unconventional English, Routledge, p. Oxford English Dictionary (Online ed.). By the 1970s, rice burner was a US English slang term for the Vietnamese folks during and after the Vietnam War. Comparably, Alaskan slang for a sled dog is "fish burner," as in a beast of burden that runs on fish. Comparably, Alaskan slang for a sled canine is "fish burner," as in a beast of burden that runs on fish.

This lack of phosphorus will limit production even when calcium is added to the soil to beat the acidity, or if acid-tolerant cultivars are planted. This is done by manipulating soil chemistry and using deep-rooted, acid-tolerant rice cultivars to help capture the leached parts. Adding lime to the subsoil is just not practical, but in 1994, IRRI and Indonesian scientists began experiments to see if elements of lime applied to the soil surface may very well be leached down into the subsoil. Scientists are presently learning the processes that govern the rate of leaching of lime components and their accumulation in the subsoil. The goals are to know the range of farmers' practices and determination-making processes and to grade the elements that limit rice crop yields. Along with the usual upland issues, those concerned in growing upland rice discover themselves going through an pressing need to conserve soil and the range of plant species and to deal with increasingly frequent and extreme weed and illness infestations. The uplands have always suffered from drought, infertile soils, weeds, and plant diseases.

This category includes both specially bred varieties that are drought-tolerant and conventional rice varieties that have tailored to drier setting. Armed with this data, they're working with IRRI's upland rice breeder to combine such genes with different fascinating traits for incorporation into new upland varieties. Scientists from the International Rice Research Institute (IRRI) have been working with colleagues in the Upland Rice Research Consortium to raised understand pathogen populations and identify resistance genes found in some cultivars. Although many conventional upland cultivars show stable resistance to this illness underneath low-enter cropping practices, they produce other traits that make them tough to use in intensified systems. Using the strategies of biotechnology, they're developing cultivars with extra durable illness resistance. Rice plant cultivars differ of their capability to compete with weeds in the field. Journal of plant nutrition and soil science. Journal of Agriculture Science. The soils there have been severely eroded and degraded on account of the slash-and-burn agriculture that followed logging for a few years.

These new upward pressures end in a movement toward permanent agriculture and an intensification of land use in upland areas. The acidity present within the subsoil of many upland areas prevents plant roots from reaching the moisture and nutrients therein, thus lowering crop yield. Leguminous plants in hedgerows make substantial quantities of atmospheric nitrogen accessible to each rice plants and annual crops and recycle different nutrients and natural matter. Allelopathic plants can affect the expansion of close by plants by means of the manufacturing of biological compounds they release into the setting. Weeds are essentially the most severe biological constraint to upland rice manufacturing. Many upland farmers plant native rice that doesn't respond nicely to improved management practices, like intensive farming using synthetic fertilizers, but these local rice varieties are properly tailored to their environments and produce grains that meet local wants. Scientists at national agricultural research systems have crossed these improved strains with local cultivars, introducing hybrid styles of rice. IRRI scientists are additionally learning how fertilizer and cultural practices affect weed communities. The purposeful application of the brokers of such diseases to weed pests among rice crops may constitute another method to weed management. Consortium scientists are also attempting to grasp how upland rice farmers' cropping systems contribute to soil erosion, with the goal of proposing doable erosion control techniques.

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