Sentences with phrase «crop yields declining»

Regarding crop yield declines for rice, previously research on rice grown in Asia has shown that for every 1 °C increase in minimum nighttime temperatures crop yields declined 10 %.

The report says that draining rice paddies in mid-season and using different fertilizers can reduce methane emissions, while switching to more heat - tolerant varieties of rice can offset crop yield declines.

Field trials in Amazonia using charcoal with compost or chicken manure find that crop yields decline after the third or fourth harvest.

Not exact matches

In particular, «agricultural commodities are supported by the dynamics of water shortages in Asia and the Western United States, the declining payback from the green revolution in terms of improving crop yields and the increasing demand from Asia for a diet based more on grains and meat as the population becomes wealthier,» the group responded by e-mail.

Crop yields begin to decline and farmers then have to use expensive fertilizers, which eat into their profits and further damage the environment

Declines in populations of pollinators now threaten both the yields of major food crops and the survival of wild plant species.

Global crop yields were beginning to decline — especially for wheat — raising doubts as to whether production could keep up with population growth.

There, he studied pollinator interactions and declines throughout Europe and how these declines affect factors such as biodiversity and crop yields.

Growing crops that cope with high temperatures can boost yields up to 15 per cent, offsetting much of the almost 20 per cent decline expected by 2100.

Declines in the ability of honey bees to pollinate will result in lower crop yields.»

As oilseed rape faces declining yields and increasing attacks from pest and disease, UK farming needs another break crop to ensure the sustainability of its agriculture and maintain cereal yields.

Declines in the pollination of wild plants may lead to increases in the population of plants that do not rely on pollinators, and pollinator declines would lead to decreases in crop yields, FuenteDeclines in the pollination of wild plants may lead to increases in the population of plants that do not rely on pollinators, and pollinator declines would lead to decreases in crop yields, Fuentedeclines would lead to decreases in crop yields, Fuentes noted.

«Migration [is] one of several options rural households face when they confront diminishing livelihoods such as a decline in crop yields.»

He and others noted that declining crop yields resulting from the heat were likely a major cause of moving.

A study of some North African countries suggests that some rain - fed crop yields could decline as much as 50 percent in extreme years by 2020.

For example, food production is projected to decline in tropical regions as rising temperatures decrease crop yields.

If local temperatures rise beyond 1 to 3 °C, crop yields are likely to decline as rising heat affects water availability and plant development.

The most severe declines in crop yields are shown in dark brown.

The study shows that for every 10 % decline in crop yields, 2 % of Mexicans are likely to leave the country.

While other regions could help alleviate the losses by allocating more land to crops - thus preventing the projected 40 % decline in crop yields - the shift would come at a large cost.

Conversely, other impacts, such as declining crop yields in the United States, might not happen until we go above the threshold.

Global crop yields were beginning to decline — especially for wheat — raising doubts as to whether production could keep up with population growth.

The most recent and comprehensive study, reported by IPS, projects significant declines in crop yields and major price increases.

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.

By advocating effectively, and educating their peers, and demonstrating how the destruction of ecosystems, declines in crop yields, and acidification of the oceans could reverse recent advances in global health, health professionals can help persuade the wider public and put pressure on governments to take immediate action.

The Southeastern Legal Foundation notes that the Morocco National Communication «lends some support [to the Agoumi reference], saying that by 2020 during drought conditions cereal yields would decline up to 50 %» but that «the data apply to cereal yields only, not crops in general as is implied by the IPCC.»

At lower levels of temperature rise, adaptation has high potential to off - set projected declines in yields for many crops, but this effectiveness is expected to be much lower at higher temperatures.

Using data for 1982 — 98 from 618 counties for corn and 444 counties for soybeans, they concluded that for each 1 - degree - Celsius rise in temperature, yields of each crop declined by 17 percent.

With arable land in retreat and water supplies falling, crop yields were already in decline in many areas, while malnutrition rates were rising — precisely the conditions witnessed in more extreme forms in the famine - affected areas today.

Climates differ and plants vary, but the basic rule for staple cereal crops grown at optimal temperature is that for every degree of warming, yields decline by 10 percent.

· As a result there is an expected change in food prices with high crop yield causing a decline in the value of those crops.

C / If global temperatures decline and through stupidity after some way is found to limit and reduce CO2, global CO2 levels are reduced through the efforts of activist climate science establishment then the world will go hungry as the world's farmers will not be able to grow enough food as both yields and cropped area are reduced due to cooler or colder temperatures and reduced amounts of that essential plant food, CO2 other wise known as that planet destroying «carbon».

The draft says that crop yields around the world will decline by up to 2 % per decade for the rest of the century.

When it comes to climate change science it seems like each new week brings a fresh study showing how much crop yields are going to decline, how much less water many places are going to have, how quickly sea level rise is going to happen, how many more infectious diseases are going to spread, et cetera, et cetera.

«n its recent review of the IPCC, the InterAcademy Council (IAC)-- an umbrella group for the world's science academies — highlighted a case in the 2007 assessment where studies projecting rapidly declining crop yields in Africa were given more weight than they merited, in the absence of supporting evidence.

2007/04/19: Nation: China vs. Earth The message is clear: Shanghai under water, Tibetan glaciers disappearing, crop yields in precipitous decline, epidemics flaring.

For example, If yields start to decline when crop growth is 30 % higher, yields have to decrease 19 % before we back to 400 PPM productivity and actual harm is started.

This result is related to a declining yield gap between irrigated and rain - fed agriculture caused by yield reductions of irrigated crops due to higher temperatures, or yield increases of rain - fed crops due to more precipitation.