Implementing strategic tillage (ST) in otherwise long-term no-till (NT) systems could control herbicide resistant weeds and increase profitability of crop production semi-arid dryland cropping systems. For the purpose this study, ST is defined as a single event (once every 6-10 years) an NT system to reduce density tolerant grass weeds. However, there little information on (>5 effects soil heal...

We study theoretically the dynamics of living polymers which can add and subtract monomer units at their live chain ends. The classic example is ionic living polymerization. In equilibrium, a delicate balance is maintained in which each initiated chain has a very small negative average growth rate ("velocity") just sufficient to negate the effect of growth rate fluctuations. This leads to an ex...

introduction: saffron is one of the most important economic plants in the khorasan province. awareness of soil quality in agricultural lands is essential for the best management of lands and for obtaining maximum economic benefit. in general, plant growth is a function of environmental factors especially chemical and physical properties of soil (20). it has been demonstrated that there was a po...

RATIONALE Small, open-label studies suggest that combinations of existing therapies may be effective for pulmonary arterial hypertension (PAH). OBJECTIVE To evaluate the safety and efficacy of adding inhaled iloprost, a prostacyclin analog, to the endothelin receptor antagonist bosentan in patients with PAH. METHODS In a randomized, multicenter, double-blind trial, inhaled iloprost (5 mug) ...

SYNOPSIS The aim of this article is to test and to improve existing models combining rhe-ological data with the molecular weight distribution (MWD). This process of testing and improving was separated into two distinct steps: First, the mixing behavior of the relaxation modulus obtained from a polymer blend was investigated and compared with the proposed mixing behavior derived from the linear ...

Cereal Chem. 71(6):532-536 Automated gel-permeation chromatography (GPC), with application pectins with a molecular weight of 107_109, which yielded fragments of of the universal calibration concept, was used to investigate the mechanism 1041 07. Consistent with gravity-flow GPC with dimethyl sulfoxide, sepaof extrusion-induced starch fragmentation in corn. High-amylose and ration indicated tha...

Dodonaea viscosa is widely cultivated in the karst graben basin and crucial for recovering land after rocky desertification. However, effect of long–time D. afforestation on changes quality soil remains unclear. Soil nutrients aggregate composition can be used to evaluate beneficial effects improving functional stability. In this study, stability were investigated using cropland, 10–year, 20–ye...

Technological advances in sugar-cane harvesting and processing is bringing about rapid changes in production systems which could impact on soil physical conditions. An increasing incidence of soil structural decline and depletion of soil carbon levels has increased the risk of soil erosion and crop yield reductions. Soil carbon (C) and aggregate stability were studied on a sugar-cane (Saccharum...

to study the effects of soil amendments on physical and hydraulic properties of a saline-sodic sandy clay loam soil, a field experiment was carried out as a complete block design with three replications. the treatments in this research consisted of control (b), 10 ton ha-1 gypsum (g), 10 ton ha-1 urban solid compost (c), three levels of vinyl alcohol acrylic acid (s1= 0.05%, s2= 0.1%, s3= 0.2%)...

We analyzed the riboflavin and niacin contents of individual cuts from clod (triceps brachii), ribeye (longissimus thoracis), top round (semimembranosus), and top sirloin (gluteus medius) from 24 fed bison bulls. The bulls came from producers in the United States and Canada and had consumed concentrate diets plus hay free choice for at least 100 d. The mean riboflavin and niacin concentrations ...