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Title: Residual value of superphosphate and Queensland rock phosphate measured using yields of serradella, burr medic and subterranean clover grown in rotation with wheat, and bicarbonate-extractable soil phosphorus / M.D.A. Bolland.
Author: Bolland, M. D. A. (Michael David Anthony), 1946- ; Western Australia. Dept. of Agriculture.
Series: Technical report (Western Australia. Dept. of Agriculture. Division of Plant Industries), ; 49.
Description: 33 p. ; 30 cm.
Subject: Rock phosphate. ; Phosphorus fertilizers. ; Trifolium subterraneum. ; Ornithopus compressus. ; Residual effects. ; Superphosphates. ; Medicago polymorpha var. brevispina. ; Crop yield. ; Phosphorus.
Notes: 21 tables, 6 figures.
34 ref.
For limited distribution only. The contents should not be cited without the permission of the authors concerned.
Type: Journal
Abstract: Relative to freshly-applied superphosphate (FSP), the residual value of superphosphate declined by about 60 per cent between the first and second crop, and by a further 25 per cent by the fourth crop. For crop 3, the residual value of superphosphate varied depending on the legume species, being about 8 per cent as affective as FSP for serradella, 30 per cent for medic, and 53 per cent for clover. For crop 1, rock phosphate was about 4 per cent as effective as superphosphate for serradella, 11 per cent f
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1 On Shelf Bunbury-Journals 05:631(941)
2 On Shelf Journals-Series 05:631(941)
3 On Shelf Narrogin-Book 05:631(941)
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