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treatments were 1) limestone as control (L) 2) to 2161 - 9427 kg ha in the alfalfa­meadow 21% greater yield than UR although it was
WA 3) SL 4) WASL 5) LBC 6) WABC 7) SLBC bromegrass mixtures) and species compa­ not statistically significant Crude protein
8) WASLBC Annual r yegrass (Lolium perenne tibility for use in the western Canadian beef acid detergent fibre starch and minerals did
L ) and kale (Brassica oleracea) were used industry 'Melrose' with crested wheatgrass not show significant responses to fertiliZer
as test crops Limestone WA SL and WA� SL at a 30 70 seeding ratio performed well in stabiliZers However in the second year SU
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application rates were 7 1 Mg ha 17 25 Mg ha ­ the Dark Brown soil Zone 'Melrose' and 'AAC increased the net energy of lactation (NEL)
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1 55 Mg ha and 13 8 � 11 Mg ha respectively Mountainview' with crested wheatgrass at by 7% compared to CTRL Based on current
and were calculated based on (calcium carbo­ a 30 70 seeding ratio performed well in the findings SU could be used as potential N
nate equivalent (CCE) and BC was applied at Black soil Zone 'Melrose' and 'AAC Mounta­ stabiliZer to enhance yield and NEL in boreal
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20 Mg ha Results indicated that application inview' with crested wheatgrass at a 50 50 climate Further studies to confirm long­term
of WA significantly increased soil pH and seeding ratio performed well in the Brown responses from a wider range of forage crops
achieved target pH in both crops WA applica­ soil Zone Seeding rate of sainfoin monocul­ are recommended
tion produced 70% greater biomass in annual tures could be reduced by at least 50% while
ryegrass and 28% higher kale yield compared maintaining forage yields to reduce seed cost 126. Estimating the plant characteristics
to control These study results suggest that WA for producers of cicer milkvetch (Astragalus cicer L.)
has liming and agronomic benefits thus could using a remote sensing approach
be used as an alternative source for liming and 125. The effects of nitrogen fertilizer D MACTAGGART AND B BILIGETU Depart­
nutrients in the podZolic soil in boreal climate stabilizers on the growth, yield, and feed ment of Plant Sciences, University of Saskatche­
quality of silage corn in a boreal climate wan, 51 Campus Drive, Saskatoon, SK., S7N 5A8
124. Agronomic analysis of sainfoin (Ono- T A M NZWINDA Y KATANDA M NADEEM S Canada.
brychis viciifolia Scop.) and grass mixtures ELLSWORTH R THOMAS L GALAGEDARA AND
for forage production in western Canada M CHEEMA School of Science and the Environ­ Stockpile graZing perennial forage can provide
K NIELSEN E J MCGEOUGH H A L ARDNER ment, Grenfell Campus, Memorial University of cattle with nutritious forage at a low cost
AND B BILIGETU Department of Plant Scien­ Newfoundland, Corner Brook, A2H 5G4 Canada; during the fall and early winter Cicer milkvetch
ces, College of Agriculture and Bioresources, (S. E.) Department of Fisheries, Forestry and (Astragalus cicer L ) is a perennial forage
University of Saskatchewan, Agriculture Buil­ Agriculture, Government of Newfoundland and legume well suited to stockpile graZing in the
ding 51 Campus Drive, Saskatoon, SK S7N 5A8, Labrador, Corner Brook, Newfoundland and moist areas of the Canadian Prairies because
Canada; (E.J.M.) Department of Animal Science, Labrador, A2H 6J8 Canada. of its consistent yield and high nutritional
Faculty of Agricultural and Food Sciences, Uni­ value Developing remote sensing tools to
versity of Manitoba, 12 Dafoe Road, Winnipeg, The application of nitrogen (N) fertiliZer identify superior breeding populations could
MB R3T 2N2 Canada. in agricultural production systems is lost accelerate the development of new variet­
approximately more than 50% to environ­ ies of cicer milkvetch The ob ective of this
Sainfoin is a palatable perennial legume that is ment; thus leading to an increase in cost of study was to compare the capacity of remote
gaining interest in the western Canadian beef crops production greenhouse gas emission sensing green area estimates based on either
industry since it does not cause frothy bloat in and environmental pollution Intensive a thresholded normaliZed diference vegeta­
graZing ruminants The ob ective of this study agriculture production demands substantial tion index (NDVI) or a Blue­NDVI to estimate
was to assess reduced sainfoin seeding rate N fertiliZer application to boost yield but the stem length forage yield and rhiZome
and determine agronomic performance of pose higher risks of N losses Urease and spread of cicer milkvetch Data was recorded
sainfoin­grass mixtures Two sainfoin cultivars nitrification inhibitors (UI and NI respectively) at the stockpile har vest date in mid­October of
(cv ) 'Melrose' and 'AAC Mountainview' were are known to reduce N losses synchroniZe 2020 on a cicer milkvetch nurser y containing
evaluated as monocultures and in mixtures N release plant N uptake and consequently 27 populations arranged in a completely ran­
with three grass species crested wheatgrass enhance growth biomass and crop yield A domiZed design with two to three replications
(Agropyron cristatum L ) cv 'AC Goliath' two­year field experiment was conducted to per population Blue­NDVI was more highly
meadow bromegrass (Bromus riparius Rehm ) evaluate the efects of urea stabiliZed with UI correlated than NDVI with the stem length
cv 'Armada' and hybrid bromegrass (Bromus [N­(n­butyl) thiophosphoric triamide (NBPT)] forage yield and rhiZome spread of cicer
riparius x Bromus inermis) cv 'AC Knowles' un­ and NIs [nitrapyrin and dicyandiamide (DCD)] milkvetch Forage yield had the highest cor­
der one­ and two­cut har vests at Swif Current on the growth yield and quality of silage corn relation with Blue ­NDVI (Pearson's Correlation
SK Saskatoon SK and Brandon MB The Experimental treatments were 1) urea (UR); Coeficient [PCC]= 0 76 p<0.001) rhiZome
sainfoin­grass mixtures compared favorably to 2) SuperU� (SU urea with DCD and NBPT); 3) spread had the lowest correlation (PCC = 0 41
a common industry mixture of 'Beaver ' alfalfa Agrotain� (AG urea with NBPT); 4) eNtrench � p<0.001) and stem length was an intermediate
(Medicago sativa L ) and 'Armada' meadow (EN urea with nitrapyrin); and 5) No­N as con­ value (PCC=0 54 p<0.001) A remote sensing
bromegrass with acceptable winter sur vival trol (CTRL) Results indicated that N fertiliZed based green area estimate from a thresholded
(93­100% sainfoin sur vival compared to 100% treatments increased chlorophyll content Blue­NDVI is efective at predicting the stem
alfalfa sur vival) forage yields (787 - 10 757 kg and crop yield by 42 - 46% and 102 - 159% length forage yield and rhiZome spread of ci­
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ha in the sainfoin­grass mixtures compared respectively compared to CTRL SU produced cer milkvetch and with further research could
be an efective breeding tool

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