The response of wheat tops and roots grown in a leaching environment to rates of nitrogen added as calcium nitrate or organic residues containing 1, 2 or 6 percent nitrogen
1991
Diggle, A.J. | Bowden, J.W. (Western Australian Dept. of Agriculture, South Perth)
In a glasshouse experiment the amount of mineral N in the soil profile 4 weeks after seeding increased with the addition of each of the sources except for 1 percent N organic material which had no effect. Addition of calcium nitrate caused the greatest increase of mineral N, but did not result in the greatest plant growth because of less efficient N uptake associated with leaching. At 7 weeks after seeding, N stress, as indicated by the N content of the plant tops, had increased more where 2 and 6 percent N organic materials were added than where calcium nitrate was added. Root profiles showed enhanced growth at the surface at 7 weeks after seeding for treatments with organic material.
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