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Estimation of minimum temperature on a mesoscale
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Myburgh --- ,Working relationships between mean minimum temperatures and environmental factors by means of regression techniques were established and used to estimate temperatures at gridpoints. These estimated temperatures were then used with a computer package program to map the isotherms on a... -
Phosphorus sorption in Natal soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S.H. Bainbridge --- Department of Agriculture, Republic of South Africa N. Miles --- Department of Agriculture, Republic of South Africa R. Praan --- Department of Agriculture, Republic of South Africa M.A. Johnston --- Department of Agronomy, Republic of South AfricaPhosphorus (P) sorption poses a severe constraint on the ability of many soils to supply adequate amounts of P to plants. In an effort to quantify the P sorption capacities of soils in Natal, P sorption isotherms of 50 topsoils... -
The relationship between the phosphorus requirement and some phosphorus characteristics of selected soils of the South African tobacco industry
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.C. Henry --- , MarieF. Smith --- ,Estimates of the phosphorus requirement (P0.11) of 20 selected soils of the South African tobacco industry were interpolated from phosphorus sorption isotherms. The relationships between P0.11 and various soil phosphorus characteristics, including Bray 2 P content and various indices of... -
A single point sorption test for the routine determination of the phosphorus requirement of low to moderate P-fixing soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.C. Henry --- , MarieF. Smith --- ,The phosphorus requirement (P0.11) of low to moderate P-fixing soils from the South African tobacco industry and KwaZulu-Natal was interpolated from multiple point P sorption isotherms. The relationship between P0.11 and a single point sorption measurement, consisting of the P...