Hltr,ttLtoN, Hsnuer A. nlo BEnNtnn, R. 1975. N-P-K fertilizer effects on yield, composition and residues of lettuce, celery, carrot and onion grown on an organic soil in Quebec. Can
0.05). In pasture, soil-S contribution and the type of the pasture employed masked the effect on yield and quality of the S-fertilizer added. No effect of the S source was found for the correction of soil S deficiency (P > 0.05) in the crop, or the pasture trial. Sulphur application increased plant P uptake. Sulphur soil deficiency correction in areas for wheat or pasture production The application of S in deficient soils is necessary to compensate for the estimation of negative gate budgets balances in the control treatments (-13 and -18 kg S ha-1). More studies are needed to establish the role of soil-S and leaching on S dynamics in andisols.]]>
'76. Carrot, onion, celery and lettuce crop succession studies on an organic soil. Can. J. Plant Sci. 56: 881-884. Crop successions involving carrot (Daucus carota L.), onion (Allium cepa L.) celery (Apiunr graveolens L.) and lettuce (Lactuca sativa L.) were organized to study the effect of each crop on the yield of the subsequent crops when grown on an organic soil. Crop sequences affected yields significantly. Carrot yields were significantly greater when they followed celery or lettuce than when they followed carrot or onion. Onion yields were greatest after celery or lettuce, less after onion, least after carrot. Celery yields were greatest after celery or lettuce. less after onion, least after carrot. Lettuce yields were greater after lettuce or celery than after onion or carrot.
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