M"y, L974 - MSpace at the University of Manitoba

Excessive moisture also effects the three species differently.
GladsËones (L969a) reported that ¿. Luteus is the most tolerant ro rüater
logging, and Vuuren (L964) suggested that tr. aLbus is the mosË sensitive.
T.4 SOIL AND FERTILITY REOUIREMENTS
The various species of lupins are well known for their ability to
grord on sub-marginal soils that are 1ow in fertility, such as sands and
gravels" Heawy soils should be avoided since they delay Ëhe maturity of
thÍs already late maËuring crop.
"Lupins characteristically gïohr on coarse-Ëextured, well drained
soíls of acíd to neutral reactionr" (Gladstones, LgTob) " However, they
are very susceptible Ëo alkaliníty and do not grow well in soils that
contain even small amounLs of lime. High levels of lime in the soíl r^¡ill
evenËually result in líme induced chlorosis at some stage in the develop-
ment of the plant" This type of chlorosis is usually associated with an
iron deficiency, buË may also reflect a mânganese defíciency in some
instances (Scholz, 1933, L934).
Lupins, like other legumes, fix atmospheric nitrogen via the root
nodules, therefore litËle or no nitrogen fertílizer is required. Glad-
sËones et al" (1964) suggested rhat all lupins require umch phosphate
f.ertilization on new 1and, buË are more efficient than many plants in
utilizing phosphorous that is less readily available. LitË1e is knovm
about the sulphur nutrition of lupins, but many other legrrnes are sensi-
tive Ëo sulphur deficiencies "
Just as the different agricultural species have dístinct differences
in climatic requirements, they also have different reguirements for soil
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