Annual ryegrass (Lolium multiflorum Lam.) and crimson clover (Trifolium incarnatum L.) were pulselabeled with C-CO2 in the field between the initiation of late winter growth (mid-February) and through flowering and seed formation (late May). Straw was harvested after seed maturation (July), and soil containing C-labeled roots and root-derived C was left in the field until September. C-enriched ...

Abstract Glyphosate is the most widely used herbicide in United States; however, concern escalating about increasing residues of glyphosate and its metabolite aminomethylphosphonic acid (AMPA) soil. There a lack scientific literature examining response cover crops to soil or AMPA. The objectives this study were evaluate impact AMPA silty clay loam on emergence, growth, biomass crops, including ...

Xanthommatin is the primary ommochrome eye pigment in mosquitoes. The terminal step in xanthommatin biosynthesis, involving oxidation of 3-hydroxykynurenine (3HK), can proceed enzymatically by phenoxazinone synthase or by nonenzymatic auto-oxidation of 3HK. The relative contributions of these pathways, however, are unclear. We isolated a novel Culex pipiens mutant (crimson) that could be used t...

Abstract. Nitrogen (N) fertilizer inputs to agricultural soils are a leading cause of nitrous oxide (N2O) emissions. Legume cover crops an alternative N source that can reduce N2O emissions compared N. However, our understanding episodic flux following crop incorporation by tillage is limited and has focused on single-species crops. Our study explores whether increasing functional diversity wit...

Crimson clover (Trifolium incarnatum L. convar. Inkara) seeds were imbibed with water solution of various pH values (4, 5, 6 and 7) at ambiental temperatures (10, 15 22 °C) the aim to reveal treatments effects on seed (imbibition, germination energy, electric conductivity) seedling traits (stem, root total length). Seeds in a laboratory by standard method for germination. When averaged over inq...

plants, some white clover plants survived for 2 to 3 yr at a pH as low as 4.2 (Voigt, unpublished data, 1996). Establishment of small-seeded legumes on strongly acid soils can Thus, acid-soil resistance at seedlings stages may be even be even more difficult than maintaining those stands once established. more critical than acid-soil resistance at older stages of Our objectives were to use a soi...