individual grain weight of wheat kernels differs with their positions on a spike. cultivation practices (such as fertilizer nitrogen and plant growth regulators application) can be used to improve weight of basal and distal kernels. for this purpose, two experiments based on randomized complete block design were carried out with three replications. the aim of this research was to study the mech...

The transitional phase of climate change is becoming a threat worldwide. Fluctuations in temperature are frequently observed the life cycles field crops. current study was intended to evaluate heat stress (HS) at sensitive stages on four wheat cultivars’ growth, grain yield, and quality traits during two consecutive seasons. experiment included spring cultivars that were exposed HS durations (i...

OBJECTIVE To find ways to improve response rates of medical and health surveys. We investigated whether a prenotification letter instead of a second reminder and varying senders of the questionnaires would affect response rates. STUDY DESIGN AND SETTING We present the results of two studies. In the first study, four groups were compared that either received a prenotification letter (group 1 a...

Three plant species from each of three grassland ecosystems were grown under elevated (700 mL/m3) and ambient (350 mL/m3) CO2 and were defoliated or left undefoliated to test whether species response to elevated CO2 and grazing is related to evolutionary grazing history or to mode of photosynthesis. The three ecosystems represented a tropical grassland dominated by C4 species (the Serengeti of ...

Field experiments were conducted at Government Adaptive Research Farm Karor Lal Eason, districtLayyah, to study the impact of trace elements on uptake of nitrogen, phosphorus, potassium and yield of wheat. The experiments were laid out in RCBD having three replications. Soil samples were collected before sowing of crop from 0-15 cm depth and analyzed for physical and chemical properties (textur...

in order to study the sink-source physiological relationship, current photosynthesis, contribution and remobilization of assimilates to grain yield in wheat and triticale genotypes, a field experiment was conducted in iran, ahvaz area on 2003-4. treatments were two bread wheat (simareh and tawer), one durum wheat (showa) and two triticale (juvanillo92 and line 45) genotypes. grain weight change...

The interactive effects of elevated [CO2] and drought on leaf photosynthesis, physiology yield in wheat (Triticum aestivum L.) are not well understood. This study evaluated the persistent stress (35–45% field water capacity) CO2 (ambient concentration + 200 ?mol mol–1) chlorophyll fluorescence, physiological indices, biomass, grain weight (in g m?2) two cultivars (large-spike cultivar Z175 mult...

in order to determine traits which affected grain yield in optimal irrigation and terminal drought deficit conditions, a field experiments with 16 spring bread wheat genotypes as randomized complete block design with three replications conducted in neishabour during 2009-10 cropping seasons. results of combined analysis of variance showed, significant differences between many of traits vegetati...