in order to indicate the effect of duck's presence, anas platyrhynchos in paddy fields on rice (oryza sativa l.) yield, yield components and its effect on weed density, an experiment was carried out in baz ghaleh dezh village, located in sangar, guilan, iran in 2013. this experiment was performed based on factorial split-plot analysis conducted in a randomized complete block design (rcbd)....

Drought is an important yield-reducing factor for corn and soya bean which are the two major crops in the Delaware, Maryland and Virginia (Delmarva) region of the United States. Cowpea (Vigna unguiculata L. Walp.) is primarily grown in drier regions of the world where it is one of the most drought-resistant food legumes. Field experiments were conducted in which 10 genetically diverse cowpea ge...

Nitrogen (N) plays a vital role in the productivity of maize (Zea mays L). To investigate fertilizer effects N on yield and growth hybrid variety (Gorilla), experiment was carried out at research farm University Swabi, Pakistan, during summer 2017-18. Four levels (Urea, Urea + Farm Yard Manure (FYM), Compost, Poultry (PM)) were set present study. Randomized complete block design (RCBD) used wit...

The relationship between the sowing patterns and yield performance is a valuable topic for food security. In this study, novel belt uniform (BU) pattern was reported, field experiment with four winter wheat cultivars carried out over three consecutive growing seasons to compare dry matter accumulation, harvest index (HI), grain components under BU line dense (LD) [BU narrow (15 cm) spacing; wid...

Abstract Crop yield improvement during the last decades has relied on increasing ratio of economic organ to total aboveground biomass, known as harvest index (HI). In most crop models, HI is set a parameter; this empirical approach does not consider that only depends plant genotype, but also affected by environment. An alternative simulate allocation mechanistically, in LPJ-GUESS model, which s...

Successful production and development of stable and adaptable genotypes only depend on the positive results achieved from the interaction between genotype and environment that consequently has a significant impact on breeding strategies. In this regard, we conducted an experiment to study genotypic differences of 16 lines durum wheat under both zinc sufficient and deficient stress during 2014-2...

The purpose of this study was to evaluate different homogeneity indices for IMRT of head and neck cancers and to suggest the best representative homogeneity index for quantitative measure of dose homogeneity. In this study 3 different homogeneity indices were evaluated for 22 head and neck cancer patients receiving dynamic IMRT treatments on Clinac-DHX linear accelerator with 6 MV photon beam. ...

Rice paddies are a major source of anthropogenic nitrous oxide (N2O) emissions, especially under alternate wetting-drying irrigation and high N input. Increasing photosynthate allocation to the grain in rice (Oryza sativa L.) has been identified as an effective strategy of genetic and agronomic innovation for yield enhancement; however, its impacts on N2O emissions are still unknown. We conduct...

In order to evaluate traits related to drought stress in eight sesame (sesamum indicum L.) genotypes, two experiments were carried out in randomized complete design with three replications in the field of the Research Station of College of Agriculture, Shiraz University, Iran. The two experiments differed with respect to their irrigation regimes. Yield related traits (number of days to maturati...