Physical-chemical characterization of soils cultivated with corn in Villaflores, Chiapas. Carretera Ocozocoautla-Cintalapa km 3, Ocozocoautla, Chiapas. With the objective of designing a strategy to reverse the low productivity and profitability presented by the cultivation of corn in the municipality of Villaflores, the chemical and physical characteristics of the soils were studied in mechanized plots distributed in 13 common and seven types of soils. The results indicate a generalized acidity in the soils, with an average pH of 5.

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Source: Ciencia del Suelo. Jul, Vol. Abstract: It is unknown whether pH and cation exchange capacity protocols currently used are also suitable for monitoring limed soil acidity evolution. The objectives of this study were to analyze the diagnostic performance over time of current and potential pH tested in two acid soils of the Buenos Aires province, treated with different doses of basic amendments, using two dilutions and two cation exchange capacity and exchangeable bases protocols.

The corrector applications were equivalent to 0,, 1. Current and potencial pH were determined potentiometrically in a ,5 water and KCl relation respectively.

The four protocols used to evaluate the pH were highly associated. The four pH measures were able to discriminate liming rates although the current pH ,5 presented the greatest differences. However, actual pH measurements were more volatile than the potential pH, at any dilution. The results indicate that 6-month anticipation liming may be sufficient for sensitive crops in soils with similar pH to those studied here. None of the determination methods for the cation exchange capacity and the saturation of the bases resulted in a size increase before liming or to discriminate the effect of each rate.

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Suelo alcalino

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Acidez y encalado de suelos

Ecuador is the most important exporter of canned peach palm, however, to date ideal soil fertility characteristics for peach palm growers remain unknown. The aim of this research was to determine optimal levels of soil nutrients for the cultivation of peach palm, specifically with regards to soil cation exchange capacity in order to obtain higher yields. Fields were evaluated based on a relative yield and extractable modified Olsen nutrient contents in each soil were determined using regression modeling to determine critical levels of each nutrient and specifically to determine the ideal soil cation exchange capacity under peach palm cultivation. Our analysis established critical levels of soil pH 6.

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