Apparently, the number of interval divisions of one and the same time series had a greater impact on the r2 value yielded from interval means (figs. 8A and C) than on the p value (figs. 8B and D).
Similarly, when evaluating the impact of extension, one can distinguish between its direct positive effect on farm income-which would reflect the impact on yields-from its potentially negative second-order impact that involves labour reallocation away from off-farm employment.
In recent years growers have noted increased leaf senescence, a problem that can substantially impact yield through preventing onion bulbs from reaching optimum size.
Looking ahead, they imply a net negative impact on yield from moderate warming in coming decades.
The simulation study indicated that both shallow drainage and controlled drainage may reduce annual drainage discharge and NO3-nitrogen losses by 20 30%, while impacting crop yields from −3% (yield decrease) to 2%, depending on lateral drain spacing.
A change in plant density without improving productivity or yield environment, negatively impacts yield.
In a previous work [ 9], raising the temperature above 90°C had a negative impact on ethanol yields from simultaneous saccharification and fermentation.
The ability of these alternative approaches to improve diterpene production was assessed by analysis of their impact on abietadiene yield from cells coexpressing GGPP and abietadiene synthases.
However, it is difficult to isolate the impact of market liberalization on wheat yields from other impacts such as increased use of fertilizers and other variable inputs, exit of inefficient producers.
A reduction of 7 cents per share due to impacts from Superstorm Sandy yielded a total of 38 cents per share in adjusted fourth-quarter 2012 earnings (non-GAAP).
By quantifying the relative impact on yield of replenishment from closed areas, we provide a means of measuring the impact of closures on overexploited stock recovery times, and we show how closures can prevent overexploitation without reducing yield.
