Rotational crops

OPPTS 860.1560 Reasonable Grounds in Support of the Petition OPPTS 860.1650 Submittal of Analytical Reference Standards OPPTS 860.1850 Confined Accumulation in Rotational Crops OPPTS 860.1900 Field Accumulation in Rotational Crops. 

The limit of detection (LOD) and limit of quantitation (LOQ) were statistically determined in alfalfa and clover raw agricultural commodities (rotational crops). The method LOD and LOQ for the EMA-producing metabolite were 0.004 and 0.012 mg kg respectively, and the LOD and LOQ for the HEMA-producing metabolite were 0.004 and 0.014mgkg respectively, for the alfalfa and clover... 

Sulfentrazone is a broad-spectrum, pre-emergent herbicide that provides good control over broadleaf weeds, grasses and sedges in crops and turf. The metabolism of sulfentrazone in animals and plants is similar. The major plant metabolite of sulfentrazone is 3-hydroxymethyl sulfentrazone (HMS). The soybean tolerance of 0.05 mg kg includes residues of sulfentrazone plus its major metabolite, HMS. The rotational crop tolerance includes residues of sulfentrazone and its major metabolites, HMS and... 

Another approach is the utilization of allelopathic rotational crops or companion plants in annual or perennial cropping systems (19). Living rye (Secale cereale L.) and its residues have been shown to provide nearly complete suppression of a variety of agroecosystem weeds (33). Similarly, residues of sorghums, barley, wheat and oats can provide exceptional suppression of certain weed species Q ). Although some progress has been made on identifying the allelochmicals from these plants, much remains to be accomplished. 

Bull, D.L. and G.W. Ivie. 1978. Fate of diflubenzuron in cotton, soil, and rotational crops. Jour. Agricul. Food Chem. 26 513-520. 

Yakle GA, Cruse RM (1984) Effects of fresh and decomposing com plant residue extracts on com seedling development. Soil Sci Soc Am J 48 1143-1146 Young CC, Zhu Thoume LR, Waller GR (1989) Phytotoxic potential of soils and wheat straw in rice rotation cropping systems of subtropical Taiwan. Plant Soil 120 95-101 Yu JQ (2001) Autotoxic potential of cucurbit crops phenomenon, chemicals, mechanisms and means to overcome. J Crop Prod 4 335-348... 

Second-generation biofuel technologies make use of a much wider range of biomass feedstock (e.g., forest residues, biomass waste, wood, woodchips, grasses and short rotation crops, etc.) for the production of ethanol biofuels based on the fermentation of lignocellulosic material, while other routes include thermo-chemical processes such as biomass gasification followed by a transformation from gas to liquid (e.g., synthesis) to obtain synthetic fuels similar to diesel. The conversion processes for these routes have been available for decades, but none of them have yet reached a high scale commercial level. 

Brandon AM, Mikkelsen DS. 1979. Phosphorus transformations in alternately flooded California soils. I. Cause of plant phosphorus deficiency in rice rotation crops and correction methods. Soil Science Society of America Journal 43 989-994. 

FUngal diseases Black, sunken patches on leaves farleft) are caused by the fungal disease downy mildew. Plok off Infeoted leaves and dispose of them Immediately next year, be sure to rotate crops. Leek rust Heft) need not spell disaster for your orops, but In future years, look for leek oultivars that offer some resistance to this fungal Infeotlon. 

What to do Plant resistant corn cultivars, and rotate crops. Remove tassels from two-thirds of corn plants before they begin to shed pollen. Pull out and destroy all infested crop residue... 

What to do Grow resistant lettuces such as Avondefiance, Musette and Beatrice. Rotate crops. 

What to do Grow plants under fleece or fine mesh netting, put in place immediately after sowing or planting. Remove infested plants as soon as onion fly is discovered. Rotate crops cultivate soil in winter to expose pupae to predators. 

Franzluebbers, A.J., Francis, C.A. and Walters, D.T. 1994. Nitrogen fertilizer response potential of corn and sorghum in continuous and rotated crop sequences. Journal of Production Agriculture 7 193-194. 

For the pristine chemistry studies which include studies such as hydrolysis, soil and water photolysis, soil dissipation, and rotational crop under environmental fate, metabolism studies, residue studies, and product chemistry studies, such as vapor pressure, octanol-water partition coefficient, and water solubility, the total study is audited. This includes the GUP issues, such as adherence to protocols, SOPs, and record accountability completeness of raw data the validation of data points and the overall scientific issues. 

Morgan and Lenz (1992) showed that the major water-soluble metabolite in wheat grain was 2-amino-3,3-dime-thyl butanoic acid (Figure 7.19). This material accounted for 11% of the total radioactive residue. Degradation of the heterocyclic ring to form the semicarbazone of pyruvic acid was reported in a potato rotational crop study by Prestel et al (1976). However, Scholz (1982) was unable to repeat this observation. 

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