Vegetable production systems are often characterized by excessive nitrogen (N) fertilization and the incorporation of large amounts of post-harvest crop residues. This makes them particularly prone to ammonia (NH3) and nitrous oxide (N2O) emissions. Yet, urgently needed management strategies that can reduce these harmful emissions are missing, because underlying processes are not fully understo...

This paper presents an approach to estimate the intrinsic texture properties (albedo, shading, normal) of scenes from multiple view acquisition under unknown illumination conditions. We introduce the concept of intrinsic textures, which are pixel-resolution surface textures representing the intrinsic appearance parameters of a scene. Unlike previous video relighting methods, the approach does n...

This paper develops two different approaches for downscaling (disaggregation) passive microwave derived soil moisture from coarse resolution L-band observations. Ground and airborne data collected over Walnut Gulch experimental watershed during the Monsoon ’90 experiment were used to test these approaches. These data consisted of eight micrometeorological stations (METFLUX) and six flights of t...

Soil water repellency (SWR) was studied in 64 surface soil samples from Tenerife (Canary Islands, Spain), distributed over three different plant communities (natural and afforested Canarian pine forest, and high mountain legume scrub) and three types of soil parent materials (basaltic and salic rocks and basaltic tephra). Soils were studied for physicochemical properties (soil pH and salinity, ...

Mineral and organic salts from beef manure contained in precipitation runoff from feedyard pen surfaces can alter the conductivity properties of soil and water receiving it. Typically, holding ponds are constructed to control runoff from concentrated animal feeding operations. The integrity of these holding ponds has come under increased scrutiny since leakage has the potential to affect soil a...

Abstract Agrochemicals and fertilizers are central to modern agriculture credited with the large increase of crop yield as a part Green Revolution 1960’s. Timely targeted fertilizer application root zones enhances effectiveness reduces unintended release environment. This is particularly important for highly mobile liquid (e.g., nitrate) that can be mobilized infiltrating water bypass root-bear...

This paper approaches the problem of recognizing and localizing object with curved smooth and weak textured surfaces in a cluttered scene. In this work we present a new local invariant feature, SUSAN edgebased scale invariant feature (SESIF), to describe weak textured object, such as insulator, which is detected in a scalespace with scale selection. Different from several previous local invaria...

In this study, to investigate the effects of runoff harvesting on soil properties in the semiarid forest, runoff harvesting through semi-circular bund was considered as a method to conserve soil and thereby combat tree mortality. In order to evaluate this hypothesis, runoff was harvested through the semi-circular bund affecting soil quality and moisture storage. The selected forest site is loca...

The Arya-Paris model is an indirect method to estimate the soil water characteristic from particle-size data. The scaling parameter, a, in the original model was assumed constant for all soil textures. In this study, a is defined as a, = (logJV//log«,-), where n, is the number of spherical particles in the ith particle-size fraction (determined by the fraction solid mass, wh and mean particle r...

Clay content and the ability to reversibly retain cations affect many essential chemical physical properties of soil, such as pH buffering carbon sequestration. Cation exchange capacity (CEC) base saturation are also commonly used criteria in soil classification. However, determination CEC particle-size distribution is laborious not included routine testing. In this study, pedotransfer function...