Direct competition for resources is generally considered the primary mechanism for weed-induced
yield loss. A re-evaluation of physiological evidence suggests weeds initially impact …

… soils was clay loam. The acidic soil had higher specific surface area, bicarbonate extractable
P, total P, and oxides of Fe, Al, and Mn. Calcareous soil had significantly higher clay content…

Atrazine (6-chloro-N-ethyl-N′-(l-methylethyl)-l,3,5-triazine-2,4-diamine) is a herbicide of the
triazine family used for controlling broadleaf and some grassy weeds in corn and sorghum. …

In the world's semi-arid regions, high crop demands have produced short term economic
incentives to convert food production on native grasslands to dryland row crop food production, …

Interactions between water and N may impact remote‐sensing‐based N recommendations.
The objectives of this study were to determine the influence of water and N stress on …

To improve site‐specific N recommendations a more complete understanding of the mechanisms
responsible for synergistic relationships between N and water is needed. The objective …

… silty clay, 0 to 2% slope (fine-silty, mixed, superactive, mesic Udic Haplustoll), with a sand,
silt, and clay … Soil at Brookings was a Vienna clay loam, 2 to 6% slope (fine-loamy, mixed, …

… geles, Los Angeles (Dr Clay). Reprint requests to Infectious Disease Section, California
State … Ramseyer JC, Clay SA, Fishman LS: Electromyographic studies in acute infantile poly…

Tylosin and chlortetracycline (CTC) are antimicrobial chemicals that are fed to >45% of the
US swine herds at therapeutic and sub-therapeutic dosages to enhance growth rates and …

The crop-weed interference relationship is a critical component of bioeconomic weed
management models. Multi-year field experiments were conducted at five locations to determine …