a three-year field experiment was conducted under conditions of luvic chernozem soil. diversified nitrogen fertilization with 0, 60, 120, and 180 kg n ha-1, and microbial preparations improving soil properties were applied to potatoes, cv. ‘satina’, cultivation. n–no3 concentration in the soil profile (0–0.9 m) in autumn after potato harvesting fluctuated from 28 kg n ha-1 in the n0 treatment t...

Nacrtak In forest harvesting, helicopter extraction systems are incredibly versatile due to their ability to avoid many of the obstacles that encumber ground based and skyline systems. Helicopter yarding is used for a variety of reasons including site sensitivity, urgency to remove or deliver the product, lack of access, and slope of the terrain. Because of the high cost of helicopter yarding, ...

A four-parity study is proposed to examine the effects of nutritional manipulation during gilt development on subsequent sow performance. Gilts will be selected from two genetic lines that are highly prolific, but differ in rate and composition of growth. During the development period (45 to 250 lb), gilts will be provided either; i) ad libitum access to feed, or ii) ad libitum access to feed u...

INTRODUCTION Ulcerative colitis (UC) require expensive, lifelong treatment, which generates huge direct costs and has a significant impact on the quality of life, especially in the active state of the disease. AIM To assess the indirect costs, health-related quality of life, and clinical characteristics of patients with UC in Poland. Additionally, we investigated the association between activ...

PURPOSE Workers with decreased work ability are at greater risk of reduced productivity at work. We hypothesized that work-related characteristics play an important role in supporting workers to remain productive despite decreased work ability. METHODS The study population consisted of 10,542 workers in 49 different companies in the Netherlands in 2005-2009. Productivity loss at work was defi...

PERFORM-K was a cross-sectional observational study that investigated functional disability, productivity and quality of life in MDD outpatients in South Korea, and the associations of these with depressive symptoms, perceived cognitive dysfunction and other factors. A total of 312 outpatients who started antidepressant monotherapy underwent a single study interview. Physicians and patients ass...

The advent of the smartphone has dramatically altered how we communicate, navigate, work and entertain ourselves. While the advantages of this new technology are clear, constant use may also bring negative consequences, such as a loss of productivity due to interruptions in work life. A link between smartphone overuse and loss of productivity has often been hypothesized, but empirical evidence ...

Principles of fluid mechanics, gas-liquid mass transfer, and irradiance controlled algal growth are integrated into a method for designing tubular photobioreactors in which the culture is circulated by an airlift pump. A 0.2 m(3) photobioreactor designed using the proposed approach was proved in continuous outdoor culture of the microalga Phaeodactylum tricornutum. The culture performance was a...