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

(Huges and Henson, 1965) "
L"523 Sèed Rates and Spacing
Recorunended seed rates Íor L. albus, L. angustifoLius and L" Luteus
are LZO Èo 160 Lb/a, 70 ro 9O Lb/a and 45 ro 60 1b/a respecríve1y (Huges
and Henson, 1965). Thís r¡¡i11 result in population densities of 180,000
to 360,000 plants/a" Van der Kamp and Riepma (1959) found rhar rhe opri-
mum plant densíty for L. Luteus was 35 to 40 pLar¡ts/mz or a seed rate of
approxiur,ately 75 to 85 ke/na" They also found ËhaË seed raÈe had a
greater influence on seed yield than did row spacing. Lamberts (1955b)
suggests that a seed rate of B0 kg/tta aË a spacing of 35 cm betr,reen rows
is adequate providing germination is at least B0%,
Shultz (1958) found that seed síze of L. aLbus influenced plant
growth and seed yields. Those grovün from seed of 1000 kernel weight of
425 xo 625 grams had better emergencee greaËer plant vigor, earlier flower-
ing, and greater seed yields than those gro\¡rn from seed T¡rith a 1000 kernel
weight of L75 to 375 grams.
1.53 l{eed Control
Many observations suggest that lupins compete
growing, broad leafed weeds" However, grass weeds
ín that they very effectively compete for moísture
and pod filling stages (Gladstones, 1969b) "
1"531 Mechanícal Control
well with prostrate
are a serious problem
duríng the seed settíng
Traditional cultivatíon procedures, as practiced for cereals, are
used for weed control in lupins" Pre and post emergence harrowíng, int.er-
rov¡ cultivation, and hand howing are practiced" Inter-rov¡ cultivation
can be used during the gror,øing season, but only if row spacing is at least
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