Nitrogen (N) application management needs to be refined for low yielding environments under dryland conditions. This 3-yr study examined nitrogen fertilization management effects on corn (Zea mays L.) plant characteristics and grain yield in rain fed environment under conventional tillage system. Nitrogen fertilization management consisted of two timing methods of N application [all N at planti...

under condition of limited water supply, determination of minimum water requisite to keep potential yield should be considered as an important target. with this respect, a field experiment was conducted at research farm of university college of agriculture and natural resources, university of tehran, in 2012-2013, karaj, iran. the experiment was conducted in a split plot, based on randomized co...

The Antarctic plunderfishes Artedidraco lönnbergi and A. skottsbergi are small, bottom dwelling species inhabiting the continental shelf of the High Antarctic Zone. During cruise 97-9 of the US RV Nathaniel Palmer during the summer in the south-western Ross Sea, samples of both species were collected by means of bottom trawling. On the basis of macroscopic and histological analysis, we present ...

The impact of an insect-free artificial diet provided at nymphal and/or adult stage upon the developmental rate, life table parameters, and fertility table parameters was examined for Podisus maculiventris (Say). This study showed that when fed an insect-free artificial diet during both the nymphal and adult stage, developmental time was prolonged, preoviposition period was extended, and reprod...

The International Network for Young Researchers in Male Fertility (INYRMF; http://www.youngresearcher.eu) is committed to establish global networks among young (early stage) scientists in testicular research and to promote collaboration and exchange of methodologies and expertise. We provide a more informal way of communication than many other congresses and meetings and promote online discussi...

Unraveling the complexity underpinning nitrogen (N) use efficiency (NUE) can be physiologically approached via examining grain N sources and N internal efficiency (NIE) (yield to plant N content ratio). The main objective of this original research paper is to document and understand sorghum NUE and physiological mechanisms related to grain N dynamics. The study of different grain N sources, her...

The law's response to reproductive genetic testing depends on a number of assumptions about choice, causation and control which need to be questioned. From the preconception stage forward, the illusion of choice may raise such fundamental questions as the woman's choice not to be tested, limits on genetic information, and the availability of reproductive options. In turn, assumptions about choi...

R. A. Fisher's 1930 "reproductive value" is defined as the contribution made by a population's initial age elements to its asymptotically dominating exponential growth mode. For the Leslie discrete-time model, it is the characteristic row vector of the Leslie matrix, and for the integral-equation model of Lotka the similar eigenfunction. It generalizes neatly to a 2-sex model of linear differen...

screening is an important subject for breeding programs of resistant varieties of lentil. in recent years many developments were carried out in identification of resistant sources of germplasm of leguminous against soil-borne causes. fusarium oxysporum f.sp. lentis is one of the important disease of lentil in the world and iran. in this study, reactions of 30 lentil genotypes evaluated to find ...

to determine the prevalence of asherman's syndrome in the south of iran and assess the safety and efficacy of hysteroscopic adhesiolysis in restoration of menstrual function and fertility, a prospective study was done from 1997 to 1999. among 2300 couples with infertility referring to the infertility clinic of a shiraz university hospital, 30 patients were proven to have asherman's sy...