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  • 1
    Electronic Resource
    Electronic Resource
    Differences in root and shoot growth and soil moisture extraction between cotton cultivars in an acid subsoil (1987)
    Springer
    Plant and soil 101 (1987), S. 241-246 
    Details
    ISSN: 1573-5036
    Keywords: acid soil tolerance ; aluminium toxicity ; cotton ; drought tolerance ; root length density
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Research was conducted to determine if differences in yield and crop growth of field-grown cotton cultivars (Stoneville 825, Deltapine 41, Auburn 56, and Pima S-5) would be related to root length density and end-of-season soil moisture content in an acid soil. Soil core root density differences between cultivars were inconsistent between years. However, normalization of root density on a percentage of total root density basis indicated Stoneville 825 and Pima S-5 had a consistently greater percentage of roots in the acidic subsoil than did Auburn 56 and Deltapine 41. Subsoil moisture remaining at the end of the season was least for Stoneville 825 and greatest for Deltapine 41. Shoot growth parameters of Stoneville 825 were numerically and often significantly greater than Deltapine 41 each year. Auburn 56 was comparable or superior to Stoneville 825 and Pima S-5 in most parameters of shoot growth. Cotton cultivar differences in root length density and implied soil moisture extraction in acidic subsoil may partly explain differences in adaptation by some cultivars to nonirrigated, drought prone, acidic soils.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02370651
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  • 2
    Electronic Resource
    Electronic Resource
    Plant response to potassium related to soil tests for potassium fractions in 30 soils from Louisiana (1986)
    Springer
    Plant and soil 96 (1986), S. 57-67 
    Details
    ISSN: 1573-5036
    Keywords: Diffieultly available K ; Exchangeable K ; K uptake ; Mica K ; Regression Greenhouse ; Sodium tetraphenylboron ; Sorghum-sudangrass ; Yield
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Bulk samples of 30 surface soils characterized in the National Cooperative Soil Survey of Louisiana were collected at the original sites and planted with sorghum-sudangrass in the greenhouse. The native K was exhausted by a total of four croppings. The available soil K was extracted with 1N NH4OAc 7.0 and 0.1N HCl while the difficultly available-K was extracted by 0.3N NaTPB (sodium tetraphenylboron). In addition, the mica content was estimated by differential dissolution. All soils except Dundee produced the greatest dry matter yield in the first crop with steadily decreasing production in the succeeding crops. The same pattern was shown in the K uptake. It appears that the first crop removed a large portion of the exchangeable K. There was a high degree of relationship between plant uptake of K and exchangeable K in the soils (r2=0.89**). Uptake by the subsequent crops was generally controlled by the K in the micaceous minerals (r2=0.89**). Since there was a high coefficient of determination between mica-K and difficulty available-K (r2=0.91**) one also finds that uptake of K by crops 2, 3 and 4 was also well correlated to difficultly available K (R2=0.94**). The uptake of K that was not originally in the exchangeable form was also highly related to difficultly available-K (R2=0.51**).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374995
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    Paper (German National Licenses)
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