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Effect of Phosphorus and Nitrogen Placement on Safflower Growth and Phosphorus Absorption
Author(s) -
Werkhoven C. H. E.,
Massantini F.
Publication year - 1967
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1967.00021962005900020014x
Subject(s) - phosphorus , fertilizer , nitrogen , dry matter , greenhouse , zoology , absorption (acoustics) , chemistry , agronomy , horticulture , biology , physics , organic chemistry , acoustics
The effect of N and P placement on safflower growth and fertilizer P absorption was studied in the greenhouse. One level of N, 112 kg/ha, as NH 4 NO 3 , and three levels of P 32 ‐labeled P, viz., 0, 28, and 56 kg P per ha, as Ca(H 2 PO 4 ) 2 ·H 2 O, were used. The placements included banding N and P together 2.5 cm below the seed, broadcasting both elements, banding P with the N broadcast, and banding N with the P broadcast. The amount of fertilizer P absorbed and plant heights were measured weekly and the percentages of total plant P and fertilizer‐derived P, as well as the dry matter yield, were determined at the conclusion of the trial. In general, banding of P was more efftcient than broadcasting. Banding 28 kg P per ha was as effective as broadcasting twice that amount. The placement of N was less important than the placement of P. Placement treatments did not affect the total P concentration in the plants.