Generalized coupled common fixed point results in partially ordered A-metric spaces

Sedghi et al. (Mat. Vesn. 64(3):258-266, 2012) introduced the notion of a S-metric as a generalized metric in 3-tuples S : X3→[0,∞), where X is a nonempty set. The aim of this paper is to introduce the concept of an n-tuple metric A : Xn→[0,∞) and to study its basic topological properties. We also prove some generalized coupled common fixed point theorems for mixed weakly monotone maps in partially ordered A-metric spaces. Some examples are presented to support the results proved herein. Our results generalize and extend various results in the existing literature.http://link.springer.com/journal/11784am201

Fixed points and coincidence points for multimaps with not necessarily bounded images

In metric spaces, single-valued self-maps and multimaps with closed images are considered and fixed point and coincidence point theorems for such maps have been obtained without using the (extended) Hausdorff metric, thereby generalizing many results in the literature including those on the famous conjecture of Reich on multimaps.</p

Integrated weed management in rice

Weeds are one of the major constraints in rice production systems. The development and adoption of proper integrated weed management strategies must form an integral part of sustainable rice production. An integrated weed management is defined as combinations of two or more weed control measures at low inputs in order to reduce weed competition in rice below an economical threshold level. Use of preventive methods and cultural practices such as crop simulation through nutrient application, method of rice sowing, planting time, plant population, and weed competitive cultivars have been recommended for minimizing impact of weeds on crop yield. The use of herbicide rotation, herbicide-resistant crops, bioherbicides, and their integration with hand tools or agricultural implements should be encouraged for better weed control efficiency