ChileanJAR

Fifteen soil samples from the province of Aisén were seeded with Lolium perenne X Lolium multiflorum in pot experiments for the diagnosis of nutritional deficiencies.
The fertility problems are considered very severe. Frequently, a simultaneous shortage of three or more chemical elements is determined. The availability of nutrients, measured with the fertility diagram, decreased in the following order: calcium, magnesium, microelements, potassium, sulfur and phosphorous. The fertility differences between soil samples are explained by climatic variability in the explored province.
The A values for the positon coefficients of the corresponding fertility lines of calcium, magnesium, potassium and micronutrients (B, Mo, Zn, Cu and Mn) are related one to another. These relationships show that the availabilities of micronutrients and those of calcium or magnesium or potassium are a linear and positive function.
The fertility lines of phosphorous, potassium, calcium, magnesium, sulfur and micronutrients give for A average values of 67.7; 80.8; 84.0, 93.8; 85.3 and 96.9 and for m: -0.01746; -0.01136; -0.00026; -0.00409; 0.01518 and -0.00477, respectively