Details van artikel 105 van 164 gevonden artikelen
Natural fertility and productivity differences of prime farmlands in Mississippi
Titel:
Natural fertility and productivity differences of prime farmlands in Mississippi
Auteur:
Cairns, J. Pettry, D. E.
Verschenen in:
Communications in soil science and plant analysis
Paginering:
Jaargang 15 (1984) nr. 2 pagina's 149-159
Jaar:
1984-02
Inhoud:
Three soil series classed as prime farmland in diverse land resource areas of Mississippi were studied. Two pedons each of the Cahaba (Typic Hapludult), Memphis (Typic Hapludalf), and Sharkey (Vertic Haplaquept) series were selected in areas that had not been cultivated for at least 40 years. The series were representative of loamy, silty, and clayey soils, and they had diverse chemical characteristics and water holding capacities. Cation exchange capacities of the surface horizons differed greatly with Sharkey (66 cmol (p+) kg ) > Memphis (19) > Cahaba (7.3). The Cahaba and Memphis surface horizons had H as the dominant exchangeable cation (H > Ca > Mg > K > Na), whereas, Ca was dominant in the Sharkey pedons (Ca > H > Mg > Na > K). Kaolinite was the dominant clay mineral in the Cahaba soils, illite was most abundant in the Memphis pedons, and smectite was dominant in the Sharkey soils. Inherent natural fertility based on greenhouse production of dry matter (wheat) clearly showed the A horizon > B horizon > C horizon (P = .05) with Sharkey > Memphis > Cahaba. Liming and fertilization reduced yield differences among the three prime farmland soils, but surface horizons remained the most productive with the A > B = C (P = .05).
Uitgever:
Taylor & Francis
Bronbestand:
Elektronische Wetenschappelijke Tijdschriften
Details van artikel 105 van 164 gevonden artikelen
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