Sentences with phrase «apply nitrogen fertilizer»

Farmers may have to apply nitrogen fertilizer as well.

Other new techniques of applying nitrogen fertilizers, such as nesting the nitrogen fertilizer, may in future also become common, and their nitrous oxide emissions will need to be measured.

Not exact matches

Seedlings can be fertilized with fairly high levels of nitrogen to encourage strong vegetative growth, but after the plants have adjusted to the garden, fertilizers should not be applied unless the plants have low nitrogen symptoms, such as leaf yellowing and stunted growth.

These variables include practices such as row spacing, type of tillage, use and type of cover crop, amount of compost and amount of nitrogen applied as fertilizer.

While organic gardeners concede the point that most compost is low in soluble nitrogen, potassium, and phosphorous, Jack Ruttle observes: «I have grown many fine vegetable gardens with no other fertilizer than an inch or two of pure compost applied once a year, and I have known plenty of other gardeners who do the same.»

Both fertilizers were applied by fertigation through the drip system at rates of 56 kg · ha - 1 nitrogen per year in 2011 - 12 and 90 kg · ha - 1 nitrogen in 2013.

For example, they can apply fertilizer in the spring instead of the fall so that much of the nitrogen is not lost before the seeds begin growing.

And, for now, farmers have to laboriously supply it by applying fertilizer or planting legumes, which host nitrogen - fixing bacteria in their roots.

«What we found is that it's not a linear relationship between the nitrous oxide and the [nitrogen fertilizer] rate applied, but a nonlinear, exponential trend across many different crop types,» including corn, major grain types, rice and grasses, said study co-author Neville Millar, senior research associate with Michigan State's W.K. Kellogg Biological Station.

Crops such as corn and soybeans flourish when nitrogen - containing fertilizer is applied to Midwestern fields, but many farmers routinely apply more fertilizer than their crops can take up.

But in most intensive farming operations, crops are believed to take up only about half of the nitrogen in the fertilizer applied.

This could remove the need to apply additional nitrogen fertilizers.

Thirty years after synthetic nitrogen (N) fertilizer had been applied to crops in 1982, about 15 per cent of the fertilizer N still remained in soil organic matter, the scientists found.

Bowman intentionally made mistakes on one test plot — «areas where we didn't apply enough nitrogen fertilizer, where we simulated mistakes in the applicator, where we shut the boom off for a short period of time or plugged it up and ran for a while,» Bowman said.

Large amounts of synthetic nitrogen fertilizer are applied around the world to ensure high plant productivity.

The need to address uncertainties applies to other areas the analysis as well, and we urge you to evaluate the increasing use of nitrogen fertilizers and herbicides associated with greater biofuel production.

For the most part, farmers combat this by applying fertilizers containing synthetic phosphorus, potassium, nitrogen and other expensive products.

This fast decomposition also limits the amount of nitrogen that can get absorbed by crop roots and requires farmers to apply more fertilizer to boost production.

And IPCC data suggest that N2O releases are far higher where nitrogen - fertilizer is applied to tropical soil compared to temperate soil — yet I am not aware of any full assessment of all emissions, including from soils, for any of the rapidly expanding tropical biofuel crops.

And excess nitrogen fertilizer applied to the fields of feed corn grown to satisfy the world's livestock runs off into streams and rivers, sometimes flowing to coastal waters where it creates large algal blooms and low - oxygen «dead zones» where fish can not survive.

For example, with nitrogen, where the majority of human emissions come from synthetic fertilizers, the real - world challenge is to apply just the right amount of nitrogen to optimize crop yields while minimizing nitrogen losses that harm aquatic ecosystems.

One possible application could be in zero tillage systems, where coated nitrogen fertilizer might allow considerably higher rates of fertilizer to be applied close to the seed.

As a long time organic gardener myself as one of my hobbies, I do apply some 10 kg organic fertilizer per year per 100 m2 in my garden, of which some 5 % is nitrogen (as nitrate).

For an average lawn, he recommends applying a high - nitrogen lawn fertilizer at a rate of one to 1.5 pounds of nitrogen per 1,000 square feet.