Short-term effects of liming on chemical attributes of tropical sandy soil and soybean (Glycine max L.) yield

Abstract

Lime application is the most appropriate technique to raise soil pH, decrease Al3+ toxicity and increase Ca2+ and Mg2+ contents in acidic tropical and subtropical moist soils. The objective of this research is to evaluate changes in chemical attributes and soybean yield in sandy soil after lime incorporation. The soil was classified as a typical Quartzipsamments cultivated with (Brachiaria decumbens Stapf) pasture, and its degradation state was classified as strong. The experimental design was a randomized block with six replicates and four lime doses (0, 2, 4 and 8 Mg ha-1). The soil in the area was prepared with one plowing and two harrowings, followed by lime application and two more harrowings to incorporate the lime up to 0.2 m depth. The dependent variables analyzed were soybean yield; numbers of pods filled, pods not filled, and total pods and soil pH in water, CaCl2 and KCl. All parameters were measured at depth of 0.0-0.1, 0.1-0.2 and 0.2-0.3 m. The increase of soil pH by the different lime rates were observed just in 0.0-0.1 and 0.1-0.2 m layers. After 6 months no changes in soil pH were observed in subsoil (0.2-0.3 m). With lower H+ and Al3+ activity and higher basic cation availability, soybean yield was also changed. The maximum soybean yield of 2,929 kg ha-1 was observed with 4.6 Mg ha-1 lime application, although pod number per plant remained constant, independent of limestone dose.

Soil Acidity Indicators for Liming in Tropical Acid Soils Cropped With Soybean Under Short- and Long-Term No-Tillage Systems

“…The rate of reaction of a lime material with soil and the maximum pH increase depends on several factors, including initial soil pH, application rate, OM, and clay content (Costa et al, 2016). Alleoni et al (2005), andNeto et al (2019) reported fast lime reaction in the soil to a depth of 20 cm under NT. Therefore, the high pH increase observed up to 20-cm depth was proportional to the application rate and reaction time of lime agree with published results.…”

Effects of Ascophyllum Nodosum and Soil Amendments on the Development of Maize Seedlings Cultivated Under Acid Oxisol

“…Tropical soils, especially those under Brazilian Savannah areas, are typically acid, highly weathered, with low nutrient availability and high exchangeable acidity (Al3+) (Fageria, 2001;Gonçalves Jr. et al, 2014;Bojórquez-Quintal et al, 2017;Esper Neto et al, 2019). Therefore, to mantain high yield and grain quality, a routine of soil fertilization and amendment for mitigation of the aluminum toxicity and low pH is crucial (Fageria et al, 2014).…”