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The Influence of Soil Moisture Regime and Phosphorus Source on the Response of Alfalfa to Phosphorus
Author(s) -
Beaton J. D.,
Gough Neville A.
Publication year - 1962
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1962.03615995002600030022x
Subject(s) - monocalcium phosphate , loam , calcareous , phosphorus , agronomy , phosphate , chemistry , soil water , water content , metaphosphate , moisture , anhydrous , phosphorite , zoology , environmental science , soil science , botany , geology , biology , geotechnical engineering , organic chemistry , fishery , fish <actinopterygii> , fish meal
The influence of soil moisture regimes and P sources on the response of alfalfa to P was studied in the growth chamber. Surface samples of two calcareous British Columbia soils, Machete stony sandy loam and the Nisconlith clay loam were used. Alfalfa yield and P uptake were highest when soil moisture tension was allowed to reach a maximum of 2.0 bars and subsequently reduced to 0.2 bars. The P sources were almost equally available with this regime. Calcium metaphosphate and anhydrous dicalcium phosphate produced the highest yields. P content of alfalfa was highest with monoammonium phosphate on the Machete soil. Monocalcium phosphate resulted in the highest tissue P with the Nisconlith soil. Amount of P removed from the soil, with the exception of hydroxyapatitc, was not markedly influenced by P source. Hydroxyapatitetreated soil released the lowest amount of NaHCO 3 ‐extractable P.