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  • 1990-1994  (2)
  • 1880-1889
  • 1993  (2)
  • BOAA  (1)
  • aeration  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Soil physical factors affecting the growth of sycamore (Acer pseudoplatanus L.) in a silvopastoral system on a stony upland soil in North-East Scotland (1993)
    Springer
    Agroforestry systems 24 (1993), S. 295-306 
    Details
    ISSN: 1572-9680
    Keywords: root growth ; soil compaction ; aeration ; soil strength ; soil moisture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Tree growth and soil physical properties were compared on two grazed plots planted with sycamore at 5 and 10 m square spacing on an upland Scottish site. Both plots received fertilizer and stocking density of ewes and lambs was adjusted to maintain a constant sward height. Mean tree height in 1990 and height increment (1988–90) were significantly greater in the 5 m spaced plot (P〈0.05). Although matric potential under the trees was generally greater than in the grassed rows between trees, mean penetration resistance (37–107 mm depth) was significantly greater (P〈0.01) under the trees. Even when the soil was close to field capacity, less than 10% of penetrometer readings were 〈 1 MPa under the trees, in comparison to 44% in grassed areas between trees. This demonstrates that surface compaction due to preferential treading by sheep near the base of trees was sufficient to have seriously reduced tree root growth. Penetration resistance under the 5 m spaced trees was significantly less (P〈0.05) than under the 10 m spaced trees. A technique for estimating the probability of root deflections by stones (in 35 mm depth intervals), Ps, from penetrometer readings was used. A significant relationship (P〈0.1) was found between tree height increment and depth to Ps≥0.4 in the 10 m plot.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00705628
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Current status and future strategy in breeding grasspea (Lathyrus sativus) (1993)
    Springer
    Euphytica 73 (1993), S. 167-175 
    Details
    ISSN: 1573-5060
    Keywords: ODAP ; BOAA ; neurotoxin ; Lathyrism ; drought-tolerance ; toxicology ; interspecific-hybridization ; mutation breeding ; germoplasm collections
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Efforts in grasspea (Lathyrus sativus) improvement have increased since the development of lines that are very low in the neurotoxin Beta-N-oxalyl-L-alpha-beta-diamino propionic acid (ODAP); also referred to as Beta-N oxalyl-amino-L-alanine (BOAA). Many programs now address several related aspects of improvement simultaneously. These include reduced ODAP concentrations, insect and disease resistance, nitrogen fixation, agronomic practices, fodder and forage production, and components for increased yielding ability. The coordinated, multidisciplinary approach now being applied to the genetic improvement of grasspea should allow the potential of this largely neglected grain legume to be fully realized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00027192
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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