Volume 12, Issue 3 | Nutrient Cycling in Agroecosystems

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Volume 12, Issue 3

October 1987

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8 articles in this issue

Nitrogen leaching and uptake from calcium cyanamide in comparison to urea and calcium ammonium nitrate in an ultisol from the humid tropics
J. L. Pleysier
Y. Arora
A. S. R. Juo
OriginalPaper Pages: 193 - 199
The initial and residual agronomic effectiveness of some Indian, USA and Australian rock phosphates
A. K. Ghosh
R. J. Gilkes
OriginalPaper Pages: 201 - 218
Ammonia losses from surface-applied urea as related to urea application rates, plant residue and calcium chloride addition
L. B. Fenn
H. L. Malstrom
E. Wu
OriginalPaper Pages: 219 - 227
How effective are Calciphos and Phospal?
M. D. A. Bolland
R. J. Gilkes
OriginalPaper Pages: 229 - 239
Seasonal patterns of phosphate uptake in relation to comparisons between fertilizers
R. S. Beckwith
P. Tolson
OriginalPaper Pages: 241 - 254
Urea, ammonium sulfate and dicyandiamide transformations in Costa Rican soils
K. Vilsmeier
E. Bornemisza
A. Amberger
OriginalPaper Pages: 255 - 261
Ammonia volatilization from point-placed urea in upland, sandy soils
R. J. Buresh
OriginalPaper Pages: 263 - 268
The effects of nitrogen fertilizer form on the plant availability of phosphate from soil, phosphate rock and mono-calcium phosphate
J. N. Apthorp
M. J. Hedley
R. W. Tillman
OriginalPaper Pages: 269 - 283