Sentences with phrase «soil nitrogen availability»

For example, once a tree has essentially as much CO2 as it can use, other conditions such as soil nitrogen availability, will become limiting.

Litterfall 15N abundance indicates declining soil nitrogen availability in a free - air CO2 enrichment experiment.

Not exact matches

Farmers have always interfered with the cycle, because nitrogen availability often limits the fertility of soils.

Positive: Increased organic matter if increased productivity; increased nitrogen availability Negative: Decreased organic matter (with increased decomposition rates); decreased mycorrhizal support; increased soil acidity; increased release, or decreased removal, of atmospheric CO2

We are at a remarkable juncture where (i) the price of oil and nitrogen - based fertilizers is expected to increase, (ii) the long term availability of phosphorus for fertilizers is in doubt, (iii) the erosion of soil is reducing yields, and (iv) climate change brings extreme weather that impacts crop survival and productivity.

These include CO2 concentrations (which generally mediate a positive influence), temperature increases (beneficial to some crops in some regions and harmful elsewhere), increases in droughts, flash floods, weeds, and insect infestations (all harmful), as well as drains on the availability of soil nitrogen needed for the protein content of food crops.

Finger RA, Turetsky MR, Kielland K, Ruess RW, Mack MC, Euskirchen ES (2016) Effects of permafrost thaw on nitrogen availability and plant - soil interactions in a boreal Alaskan lowland.