Pub Date : 2016-08-23DOI: 10.2136/SSSASPECPUB1.C19
W. A. Ehrlich, H. M. Rice, J. H. Ellis
The analysis of the major horizons of ten soil profiles was undertaken in an attempt to ascertain the effect of the composition of parent material on soil formation in well-drained Mankato till sediments, under various environmental conditions. The results showed that the composition of parent materials had a profound effect on the type of profile formed. Increasing amounts of inorganic carbonates restricted profile development and inhibited the decomposition of non-calcareous rock fragments. The amount of inorganic carbonates in the parent material has been a major factor in determining and differentiating certain great soil groups; furthermore, the mineralogical composition of the parent material also has been a determining factor in the formation of Brown Podzolic and Podzol soils. Weathering of non-calcareous minerals and rocks (except shale) was found to be comparatively slight; examination of the clay fraction revealed approximately equal percentages of the dominant types in each horizon.
{"title":"Influence of the Composition of Parent Materials on Soil Formation in Manitoba1","authors":"W. A. Ehrlich, H. M. Rice, J. H. Ellis","doi":"10.2136/SSSASPECPUB1.C19","DOIUrl":"https://doi.org/10.2136/SSSASPECPUB1.C19","url":null,"abstract":"The analysis of the major horizons of ten soil profiles was undertaken in an attempt to ascertain the effect of the composition of parent material on soil formation in well-drained Mankato till sediments, under various environmental conditions. The results showed that the composition of parent materials had a profound effect on the type of profile formed. Increasing amounts of inorganic carbonates restricted profile development and inhibited the decomposition of non-calcareous rock fragments. The amount of inorganic carbonates in the parent material has been a major factor in determining and differentiating certain great soil groups; furthermore, the mineralogical composition of the parent material also has been a determining factor in the formation of Brown Podzolic and Podzol soils. Weathering of non-calcareous minerals and rocks (except shale) was found to be comparatively slight; examination of the clay fraction revealed approximately equal percentages of the dominant types in each horizon.","PeriodicalId":9588,"journal":{"name":"Canadian Journal of Agricultural Science","volume":"16 1","pages":"228-244"},"PeriodicalIF":0.0,"publicationDate":"2016-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91160787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ten different measurements or counts were made on leaf samples of five peach varieties in six locations over 3 years with the object of testing the possibility of identifying varieties in the nursery. Of the ten leaf-measurements, length of blade, width of blade, base angle, apex angle, and length of petiole, showed higher discriminative values than the other measurements under test. Measurements assisted considerably the visual method of identification However, none of these measurements alone made it possible to distinguish between certain varieties that were very similar in their leaf characteristics Large leaves from the middle portion of the central shoot of the nursery tree gave the most reliable samples.
{"title":"Leaf Measurements as a Means of Identification of Peach Varieties in Nursery Trees1","authors":"K. Lapins, C. Hornby","doi":"10.14288/1.0106323","DOIUrl":"https://doi.org/10.14288/1.0106323","url":null,"abstract":"Ten different measurements or counts were made on leaf samples of five peach varieties in six locations over 3 years with the object of testing the possibility of identifying varieties in the nursery. Of the ten leaf-measurements, length of blade, width of blade, base angle, apex angle, and length of petiole, showed higher discriminative values than the other measurements under test. Measurements assisted considerably the visual method of identification However, none of these measurements alone made it possible to distinguish between certain varieties that were very similar in their leaf characteristics Large leaves from the middle portion of the central shoot of the nursery tree gave the most reliable samples.","PeriodicalId":9588,"journal":{"name":"Canadian Journal of Agricultural Science","volume":"74 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1954-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77407485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1953-01-01DOI: 10.1016/s0042-207x(54)80193-x
W. J. Pigden
{"title":"The Relation of Lignin, Cellulose, Protein, Starch and Ether Extract to the “Curing” of Range Grasses1","authors":"W. J. Pigden","doi":"10.1016/s0042-207x(54)80193-x","DOIUrl":"https://doi.org/10.1016/s0042-207x(54)80193-x","url":null,"abstract":"","PeriodicalId":9588,"journal":{"name":"Canadian Journal of Agricultural Science","volume":"26 1","pages":"364-378"},"PeriodicalIF":0.0,"publicationDate":"1953-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87647031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1951-01-01DOI: 10.5962/BHL.TITLE.142988
R. L. Pharis, J. Unrau
A study was undertaken to determine the effectiveness of a locally built mechanical tripper and of leaf cutter bees, bumble bees and honey bees in bringing about tripping and seed setting in alfalfa Automatic or mechanical tripping followed by self pollination resulted in 31 6 per cent of pod formation and 1 7 seeds per pod When tripping was accompanied by cross pollination 74 8 per cent of the flowers formed pods and these pods contained an average of 4 7 seeds Bumble and leaf cutter bees tripped 90 2 and 61 0 per cent respectively of the flowers under observation In both cases the pods contained on the average 4 5 seeds which is proof that these bees cross pollinated when they tripped the flowers Honey bees were ineffective both as trippers and pollinators of alfalfa flowers There was an increase in the incidence of automatic tripping when honey bees had been in a cage for a period of five days The average number of seeds per pod under natural conditions was 4 4, proving that most of the pods set in the...
{"title":"Seed Setting of Alfalfa Flowers Tripped by Bees and Mechanical Means1","authors":"R. L. Pharis, J. Unrau","doi":"10.5962/BHL.TITLE.142988","DOIUrl":"https://doi.org/10.5962/BHL.TITLE.142988","url":null,"abstract":"A study was undertaken to determine the effectiveness of a locally built mechanical tripper and of leaf cutter bees, bumble bees and honey bees in bringing about tripping and seed setting in alfalfa Automatic or mechanical tripping followed by self pollination resulted in 31 6 per cent of pod formation and 1 7 seeds per pod When tripping was accompanied by cross pollination 74 8 per cent of the flowers formed pods and these pods contained an average of 4 7 seeds Bumble and leaf cutter bees tripped 90 2 and 61 0 per cent respectively of the flowers under observation In both cases the pods contained on the average 4 5 seeds which is proof that these bees cross pollinated when they tripped the flowers Honey bees were ineffective both as trippers and pollinators of alfalfa flowers There was an increase in the incidence of automatic tripping when honey bees had been in a cage for a period of five days The average number of seeds per pod under natural conditions was 4 4, proving that most of the pods set in the...","PeriodicalId":9588,"journal":{"name":"Canadian Journal of Agricultural Science","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1951-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88220704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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