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The results of the first 4 years of an experiment which has involved frequent applications of ammonium sulfate within a 1-km² tract of nitrogen-poor d...

In view of the use of salt marshes along the southern shores of Hudson Bay as breeding grounds and feeding areas by lesser snow geese and Canada geese...

Nitrate, ammonium, and phosphate were added to the forest floor of an alluvial swamp at a weekly rate of 1 g of nitrogen or phosphorus per m² for near...

A comparative study was carried out on nitrogen flows in two meadow ecosystems that were similar at the beginning of the experiment. In the wet meadow...

Applications of ammonium nitrate (NH₄NO₃) to cores of Sphagnum magellanicumin situ at 2-week intervals for 20 weeks from mid-June at a raised mire in ...

The role of N in limiting herbage production was assessed in an altitudinal sequence of Agrostis-Festuca grasslands in the Moor House National Nature ...

Climax perennial grasses from Rhodesia showed greater preference than earlier seral species or crop cultivars for the ammonium source of nitrogen. It ...

Watkins & Rice (1974) concluded that the denuded area probably remained bare because of the high concentrations of cadmium and zinc combined with ...

Mineral nitrogen concentrations were greater in acid spoils (pH<5) than in limed or neutral spoils. In acid spoils, the predominant form was NH4-N....

Yield responses of various grasses to ammonium-N and nitrate-N were investigated in pot trials. Yields with nitrate-N as a percentage of those with am...