A field experiment was conducted at the Bangladesh Agricultural University (BAU) to find out possible effects of alternate wetting and drying irrigation (AWDI) on the yield, water use and water use efficiency (WUE) of Boro rice. The experimental layout was furnitured using split-plot design (SPD) with two modern varieties (MV) of rice viz. BRRIdhan 28 and BRRIdhan 29, which received four irriga...

Water shortage in the arid-semiarid regions of China seriously hampers ecosystem construction. Therefore, elucidation of the mechanisms by which vegetation in that area responds to drought stress may enable us to improve utilization of limited water resources and thus contend with the problem of drought and water shortage. We studied Bothriochloa ischaemum, a native grass species, conducted pot...

Effective irrigation scheduling is a prerequisite to optimising the use of expensive irrigation water for sugarcane production in South Africa. Accurate irrigation scheduling is not widely practised in the sugar industry despite the many scheduling tools available to sugarcane growers. This leads to very low water use efficiencies (WUE) of approximately 50% of what could be achieved theoretical...

The cross-section for γγ → tt̄ with arbitrary polarized photons is calculated within the electroweak Standard Model including the complete virtual and soft-photonic O(α) corrections. We present a detailed numerical discussion of the radiative corrections with particular emphasis on the purely weak corrections. These are usually of the order of 1–10% for energies up to 1 TeV. For unpolarized or e...

The use of plastic mulching and high frequency hydroponic drip irrigation (intensive production methods) watering cycle may increase tabasco pepper crop per unit area. To test this hypothesis, two randomized block experiments were conducted in a greenhouse, using 2 × 4 factorial scheme with contrasting soil types (sandy loam loamy soil), conditions cover (SC), no (NC) at four frequencies: 1, 3,...

Ecosystem water-use efficiency (WUE) has been central in revealing the variability terrestrial carbon and water cycles. Short-rotation plantations such as Eucalyptus can simultaneously impact net primary production (NPP) actual evapotranspiration (ETa), components of WUE, resulting changes However, there are few detailed studies on WUE at catchment scale with high spatial remote sensing imagery...

The impact of different combinations water–nitrogen coupling on maize yield and the environment needs investigation. Low, medium, high levels irrigation N application gradients were studied through field experiments to elucidate suitable zone for spring in West Liaohe Plain during three hydrological year patterns under drip with plastic film. effects couplings yield, water- nitrogen-use efficie...

BACKGROUND The synergetic effects of recent rising atmospheric CO(2) and temperature are expected to favor tree growth in boreal and temperate forests. However, recent dendrochronological studies have shown site-specific unprecedented growth enhancements or declines. The question of whether either of these trends is caused by changes in the atmosphere remains unanswered because dendrochronology...

[1] Relative impacts of multiple global change factors on ecohydrological processes in terrestrial ecosystems have not been carefully studied. In this study, we used a terrestrial ecosystem (TECO) model to examine effects of three global change factors (i.e., climate warming, elevated CO2, and altered precipitation) individually and in combination on runoff, evaporation, transpiration, rooting ...