Sentences with phrase «effects on crop yields»

Improved agricultural water management could halve the global food gap by 2050 and buffer some of the harmful climate change effects on crop yields.

Not exact matches

Deryng, D., Sacks, W., Barford, C. & Ramankutty, N. Simulating the effects of climate and agricultural management practices on global crop yield.

Unfortunately, although certain active ingredients in certain herbicides on crops make bigger yields sooner, there might be connection to negative health effects.

The second objective was to use the evaluated modules to assess the long - term effects of growing winter wheat as a cover crop on water balances and seed cotton yield under irrigated and dryland conditions, Ale said.

The effects of nitrogen and phosphorus fertilizers on crop yields are well - researched, of course.

The form of phosphate plants can use is in danger of reaching its peak — when supply fails to keep up with demand — in just 30 years, potentially decreasing the rate of crop yield as the as the world population continues to climb and global warming stresses crop yields, which could have damaging effects on the global food supply.

Recent advancements in the use of LED lighting in plant and vegetable production systems has researchers looking for insights into the effects of these artificial lights on the growth and yield of crops.

We focus instead on one major insect pest --- wheat stem sawfly (Cephus cinctus Norton)-- on Montana's dominant crop, wheat, to illustrate the mechanisms and principles involved in assessing climate change effects on agricultural pests and their impacts on crop yield or quality.

While climate change in recent decades has been found to negatively affect crop yields in many regions, a new study led by Carnegie's Julia Pongratz is the first to examine the potential effect of geoengineering on food security.

Climate change effects on agriculture will have consequences for food security both in the U.S. and globally, not only through changes in crop yields, but also changes in the ways climate affects food processing, storage, transportation, and retailing.

A new study in the Proceedings of the National Academy of Sciences examining the effects on immigration of decreased crop yields due to climate change finds that by 2080 millions of Mexican farmers could be forced to

On the pro side, supporters claim that changes to the genetic structure of a plant can help it resist weed killers, avoid pests, and yield more crops, but the anti-GMOers remind us that the long - term effects of these foods just aren't clear.

Although the elevated concentrations of atmospheric CO2 that raise temperature can also raise crop yields, the detrimental effect of higher temperatures on yields overrides the CO2 fertilization effect for the major crops.

In fact the Summary says that negative impacts of climate change on crop yields have been more common than positive impacts, with wheat and maize yields negatively affected in many regions and effects on rice and soybean yields smaller in major production regions.

A recent meta - analysis published in the journal Nature Climate Change, by Challinor et al. (2014) examines 1,722 crop model simulations, run using global climate model output under several emissions scenarios, to evaluate the potential effects of climate change and adaptation on crop yield.

Ainsworth, E.A. and J.M. McGrath, 2010: Direct effects of rising atmospheric carbon dioxide and ozone on crop yields.

Hammer believes that this indirect effect of temperature on plant growth has a larger impact on crop yield than heat stress:

Many crop yields are predicted to decline due to the combined effects of changes in rainfall, severe weather events, and increasing competition from weeds and pests on crop plants (Ch.

U.S. Department of Agriculture data tables provide evidence for the importance of the eight Midwest states for U.S. agricultural production.3 Evidence for the effect of future elevated carbon dioxide concentrations on crop yields is based on scores of greenhouse and field experiments that show a strong fertilization response for C3 plants such as soybeans and wheat and a positive but not as strong a response for C4 plants such as corn.

Observational data, evidence from field experiments, and quantitative modeling are the evidence base of the negative effects of extreme weather events on crop yield: early spring heat waves followed by normal frost events have been shown to decimate Midwest fruit crops; heat waves during flowering, pollination, and grain filling have been shown to significantly reduce corn and wheat yields; more variable and intense spring rainfall has delayed spring planting in some years and can be expected to increase erosion and runoff; and floods have led to crop losses.4, 5,6,7

The additional processes included in the JULES model will provide a more complete picture of water resources of South Asia than previously possible, allowing quantitative analysis of the effects of changes in river flow and glaciers on water resources and the implications of these changes on water availability for irrigation and therefore crop yields.

Effect of Climate Variables on Yield of Major Food - Crops in Nepal.

The company's technology platform, based on identifying promising cellulose genes, transforming crop plants with candidate genes, and evaluating the effects on growth, yield, and cellulose hydrolysis would be applicable to a variety of energy crops including switchgrass, sorghum, and sugar cane.

Rodale Institute's Research Department investigates a number of scientific and regenerative farming issues, including cover crop practices, organic weed management, organic no - till systems, compost use, influences of agricultural practices on water quality, and effects of mycorrhizae and other soil biota on crop and soil health, and yields.

They found that higher temperatures during the growing season had an even greater effect on yields of these crops than many scientists had reckoned.

The opposite trend was observed for barley (Hordeum vulgare), wheat (Triticum aestevum), and hay crops, however, suggesting the geographical yield potential has an inconsistent effect on the organic yield gap.

They were trying to split out the effects of climate change on crop yields — a worthwhile exercise, no?

Vinny: «They were trying to split out the effects of climate change on crop yields — a worthwhile exercise, no?»

Joshi, Niraj Prakash and Maharjan, Keshav Lall and Piya, Luni (2011): Effect of climate variables on yield of major food - crops in Nepal - A time - series analysis -.

say it has been predicted that «the average temperature in the semiarid northwest portion of China in 2050 will be 2.2 °C higher than it was in 2002,» and they report that based on the observed results of their study, this increase in temperature «will lead to a significant change in the growth stages and water use of winter wheat,» such that «crop yields at both high and low altitudes will likely increase,» by 2.6 % at low altitudes and 6.0 % at high altitudes... Even without the benefits of the aerial fertilization effect and the anti-transpiration effect of the ongoing rise in the air's CO2 content, the increase in temperature that is predicted by climate models for the year 2050, if it ever comes to pass, will likely lead to increases in winter wheat production in the northwestern part of China, not the decreases that climate alarmists routinely predict.»

Those who say that increased CO2 will increase agricultural productivity are ignoring the effects of highly variable weather on crop yields; this summer's heat wave was estimated to reduce corn yields by 10 - 20 % as I recall from news reports from the Midwest.

Really you need to take into account the effect on individual health and diet of the food itself, any residues on it, the effect on farmers» lives, on community's lives, on the health of the animals in field, of the crops and the crop yield, on the climate impact, on runoff into rivers, streams and oceans, on the economic system in which the farms operate, and more.

Here's why: Energy Returned on Energy Invested Better Too Although the study did not take into account the effects of indirect emissions, such as land use changes, because of improvements in crop and soil management, as well as corn hybrids which allow for steadily increased crop yields,