Collision death in seedling production

Longleaf Pine Seedling Production

Longleaf pine is a highly desirable species, resisting fire, insects and pathogens, and produces quality solid-wood products, but regeneration of the species has been difficult. Natural regeneration is feasible only on a small portion of the area considered to be longleaf pine type. Therefore, artificial regeneration must become a reliable means of regenerating the species if restoration of the...

Use of local material in seed-bed mixes for production of seedling from true potato seed

Enhancing seedling production of native species to restore gypsum habitats.

Gypsum habitats are widespread globally and are important for biological conservation. Nevertheless, they are often affected by human disturbances and thus require restoration. Sowing and planting have shown positive results, but these actions are usually limited by the lack of native plant material in commercial nurseries, and very little information is available on the propagation of these sp...

Effect of Atomic Bonding on Defect Production in Collision Cascades

We study the mechanisms of damage production during ion irradiation using molecular dynamics simulations of 400 eV 10 keV collision cascades in four different materials. The materials Al, Si, Cu and Ge are contrasted to each other with respect to the mass, melting temperature and crystal structure. The results show that the crystal structure clearly has the strongest effect on the nature of the...

Fragmentation contribution to quarkonium production in hadron collision

We compute the contributions due to gluon and heavy-quark fragmentation to quarkonium production at large transverse momentum in p̄p and pp collisions. For inclusive J/ψ production, there is a large contribution from the g → χc fragmentation. At large pT , this is comparable to the conventional charmonium model prediction via gluon fusion at the ISR and dominates over the latter at the Tevatron ...