Zobrazeno 1 - 10 of 33 pro vyhledávání: '"B. T. Barnes"'
1
A direct-reading photoelectric colorimeter
Autor: B. T. Barnes
Publikováno v: The Review of scientific instruments. 16
A special current balance is used with photo‐cell filter combinations whose spectral sensitivities are nearly proportional to the I.C.I. x, ȳ, and z functions. Approximate color‐coordinate values are indicated directly on the dials of this instr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::17386ba654199e634de812e4a0570851
https://pubmed.ncbi.nlm.nih.gov/21007640
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4
EFFECTS OF DIFFERENT METHODS OF CULTIVATION AND DIRECT DRILLING, AND DISPOSAL OF STRAW RESIDUES, ON POPULATIONS OF EARTHWORMS
Autor: F. B. Ellis, B. T. Barnes
Publikováno v: Journal of Soil Science. 30:669-679
Summary Numbers of earthworms collected from direct-drilled or ploughed land were studied during successive years on contrasting soil types sown with cereals. Samples were taken in autumn using a combination of chemical expulsion and hand sorting of
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5a0194e7e9ece2a556afd59f66724f9e
https://doi.org/10.1111/j.1365-2389.1979.tb01016.x
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5
Comparison of direct drilling, reduced cultivation and ploughing on the growth of cereals: 3. Winter wheat and spring barley on a calcareous clay
Autor: R. Q. Cannell, F. B. Ellis, B. T. Barnes, J. G. Elliott, F. Pollard
Publikováno v: The Journal of Agricultural Science. 93:391-401
SUMMARYMouldboard ploughing, deep and shallow tined cultivation followed by conventional seed-bed preparation, and direct drilling were compared from 1972 to 1976 on a calcareous clay soil in two experiments, one on winter wheat and the other on spri
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::041398ad11965798d446af28b70aab75
https://doi.org/10.1017/s0021859600038077
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6
Growth and development of root systems of winter cereals grown after different tillage methods including direct drilling
Autor: F. B. Ellis, B. T. Barnes
Publikováno v: Plant and Soil. 55:283-295
A method is described for rapidly estimating the depth of penetration and density of roots of cereal crops under field conditions. Counts of living roots, traversing horizontal faces of soil cores, were made for winter wheat growing on direct-drilled
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a46f5563a1b6255f77a225fb1887b13e
https://doi.org/10.1007/bf02181808
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7
Comparison of direct drilling, reduced cultivation and ploughing on the growth of cereals
Autor: B. T. Barnes, F. Pollard, J. G. Elliott, F. B. Ellis
Publikováno v: The Journal of Agricultural Science. 97:677-684
SUMMARYThe results are reported of two experiments made on a silt loam soil over chalk on downland in southern England. Three primary tillage treatments (ploughing, deep or shallow tine cultivation) were compared with direct drilling for their effect
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::28c205234468e6956ce4c9e2d73e7881
https://doi.org/10.1017/s0021859600037047
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9
Estimation of the distribution of living roots of plants under field conditions
Autor: F. B. Ellis, B. T. Barnes
Publikováno v: Plant and Soil. 39:81-91
A method is described for estimating the relative distribution of living roots of graminaceous plants growing under normal field conditions and which does not involve separation of roots from soil.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a1c525d85b7a72174210fc0a1b0c5754
https://doi.org/10.1007/bf00018047
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