Sunflowers : a versatile native crop (2017)

This guide informs on the varieties, uses of, and management practices for the sunflower as a crop

Cover crops in Missouri : putting them to work on your farm (2016)

New 8/15; Link updates 4/16/Web

Aligned macroporous monoliths with intrinsic microporosity via a frozen-solvent-templating approachd

Aligned macroporous monoliths of an organic cage, a polymer of intrinsic microporosity (PIM-1), and a metal–organic framework (HKUST-1) are prepared by a controlled freezing approach. In addition to macropores, all the monoliths contain the intrinsic micropores.</p

Hierarchical porous metal-organic framework monoliths

Hierarchical porous crystalline metal-organic framework (MOF) monoliths are prepared by powder-packing synthesis. The resulting MOF monolithic column shows fast and efficient chromatographic separation

The Quantized O(1,2)/O(2)×Z2O(1,2)/O(2)\times Z_2 Sigma Model Has No Continuum Limit in Four Dimensions. I. Theoretical Framework

The nonlinear sigma model for which the field takes its values in the coset space $O(1,2)/O(2)\times Z_2$ is similar to quantum gravity in being perturbatively nonrenormalizable and having a noncompact curved configuration space. It is therefore a good model for testing nonperturbative methods that may be useful in quantum gravity, especially methods based on lattice field theory. In this paper we develop the theoretical framework necessary for recognizing and studying a consistent nonperturbative quantum field theory of the $O(1,2)/O(2)\times Z_2$ model. We describe the action, the geometry of the configuration space, the conserved Noether currents, and the current algebra, and we construct a version of the Ward-Slavnov identity that makes it easy to switch from a given field to a nonlinearly related one. Renormalization of the model is defined via the effective action and via current algebra. The two definitions are shown to be equivalent. In a companion paper we develop a lattice formulation of the theory that is particularly well suited to the sigma model, and we report the results of Monte Carlo simulations of this lattice model. These simulations indicate that as the lattice cutoff is removed the theory becomes that of a pair of massless free fields. Because the geometry and symmetries of these fields differ from those of the original model we conclude that a continuum limit of the $O(1,2)/O(2)\times Z_2$ model which preserves these properties does not exist.Comment: 25 pages, no figure

Encouraging Farmer Adoption of Regenerative Agriculture Practices in the United States

Farmers and ranchers are facing escalating challenges from climate change as they confront the consistent need to maintain high levels of productivity. Modern farming practices have enabled farmers to increase per acre production substantially over the last several decades, but these practices can also contribute to the depletion of the quantity and quality of natural resources (such as soil and water). There is a potential solution: regenerative agriculture.Regenerative agriculture is an emerging approach to farming that aims to increase farm resiliency by improving soil health, restoring natural resources, and increasing biodiversity through integrated farming practices. It can play a key role in helping farmers develop more resilient production systems and mitigate the challenges they face, all while contributing to the goals of companies supporting these practices, including goals of achieving carbon neutrality and sustainable supply chains. Regenerative agriculture does, however, face barriers that impede its adoption, namely financial concerns, access to necessary materials, equipment, and infrastructure, knowledge and education, time, and land tenure. Through public and private programs aimed at supporting farmers' adoption of regenerative agricultural practices, it is possible to reduce barriers to implementation and build farmer capacities, ultimately championing a regenerative future for agriculture