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Surface and subsurface acidity and soil compaction restrict root exploration and impair crop yields in agropastoral systems under no‐till. To support the development of surface and subsurface acidity correction methodologies that can decrease soil compaction in agropastoral systems under no‐till, this study tested the following hypotheses: (a) the incorporation of limestone with plowing and harrowing (conventional tillage) for surface and subsurface acidity correction decreases soil compaction in agropastoral systems under no‐till, (b) the subsurface application of hydrated lime with a shank subsoiler‐fertilizer (minimum tillage) for surface and subsurface acidity correction decreases soil compaction in agropastoral systems under no‐till, and (c) the surface application of Ca compounds (no tillage) for surface and subsurface acidity correction increases soil compaction in agropastoral systems under no‐till. In a field experiment in an agropastoral system under no‐till in an Arenic Hapludalf in Brazil, the abilities of three application management methodologies (no tillage, conventional tillage, and minimum tillage) for three Ca compounds (limestone, phosphogypsum, and hydrated lime) to ameliorate acidity in the surface and subsurface layers and decrease soil compaction were evaluated. The experimental design was a randomized complete block with four replications. The results support the following conclusions: (a) the incorporation of limestone with plowing and harrowing does not decrease soil compaction in agropastoral systems under no‐till; (b) the subsurface application of hydrated lime with a shank subsoiler‐fertilizer does not decrease soil compaction in agropastoral systems under no‐till; and (c) the surface application of limestone does not increase soil compaction in agropastoral systems under no‐till. Core Ideas: The incorporation of limestone with plowing and harrowing does not decrease soil compaction.The subsurface application of hydrated lime with a shank subsoiler‐fertilizer does not decrease soil compaction.The surface application of limestone does not increase soil compaction. [ABSTRACT FROM AUTHOR]

There is little information on the use of agricultural hydrated lime in sustainable agricultural production systems, mainly in the cultivation of soybean in no-tillage. The present work was carried out with the objective of evaluating the effect of hydrated agricultural lime application on soybean cultivation in no-tillage in the Northwest region of São Paulo State, Brazil. The experimental design was a randomized block with four treatments (T1: standard treatment (without application of agricultural hydrated lime); T2 - application of hydrated agricultural lime in surface to establish that calcium occupies 70% of the CTC in the 0-0.20 m layer, T3 - application of hydrated agricultural lime in surface to establish that calcium occupies 52.5% of the CTC in the 0-0.20 m layer, T4 - application of agricultural hydrated lime in surface to establish that calcium occupies 35% of CTC in the 0-0.20 m layer) and four replicates. The parameters evaluated in the soybean crop were: height of insertion of the first pod, height of plants, final stand ha-1, mass of one hundred grains and grain productivity ha-1. The data were submitted to the F test and the means were compared by the Tukey test (p <0.05). It was verified that the treatment T2 presented higher height of insertion of the first pod than the standard treatment. For the other evaluated agronomic characteristics, there was no difference between treatments. [ABSTRACT FROM AUTHOR]

Each year, breeding companies create new cultivars to meet the demands of producers, who have before them the growing need to produce more despite the difficulties. The present work had the objective of evaluating the adaptation of different soybean cultivars, to the edaphoclimatic conditions of São Paulo, State, Brazil. The parameters evaluated in the soybean crop were: height of insertion of the first pod, height of plants, final stand ha-1, mass of a thousand grains and grain yield. The experimental design was in randomized complete block design. The data were submitted to the F test and the means were compared by the Scott-Knott test (p <0.05). It was verified that the cultivars evaluated had, in average, one hundred grain mass varying from 12.37 to 17.19 g and grain productivity varying from 2172 to 3471 kg ha-1, in the eight sites evaluated in São Paulo State. [ABSTRACT FROM AUTHOR]

The objective of this work was to evaluate the effect of the application of agricultural lime, agricultural gypsum and agricultural hydrated lime on the agronomic characteristics of the maize crop, cultivated in agropastoral system, under the edaphoclimatic conditions of the Northwest region of São Paulo State, Brazil. The parameters evaluated in the maize crop were: height of insertion of the first cob, height of plants, final stand ha-1, number of cobs ha-1, mass of one hundred grains and grain productivity. The experimental design was a randomized block with seven treatments (T1: standard treatment: without the use of agricultural limestone, agricultural gypsum and hydrated agricultural lime and no tillage; T2: agricultural limestone and agricultural gypsum on the surface in first year and agricultural limestone on the surface in second year; T3: agricultural limestone and agricultural gypsum incorporated in first year and both on the surface in second year; T4: agricultural limestone incorporated in first year and on the surface in second year; T5: agricultural hydrated lime and agricultural gypsum on the surface; T6: hydrated lime on the sub surface, at a dose of 450 kg ha-1 and agricultural gypsum on the surface in first year and hydrated agricultural lime on the surface in second year; T7: hydrated agricultural lime on sub surface, at a dose of 260 kg ha-1 and agricultural gypsum on the surface in first year and hydrated agricultural lime on the surface in second year) and four replications. The data were submitted to the F test and the means were compared by the Tukey test (p <0.05). It was verified that the application of agricultural hydrated lime at a dose of 260 kg ha-1 along the soil profile, associated to the use of agricultural gypsum on the surface and the application of hydrated agricultural lime on the surface in the following year resulted in a higher corn grain productivity and that soil tillage for the incorporation of agricultural limestone and agricultural gypsum in the previous year compromised the grain productivity of the maize crop. [ABSTRACT FROM AUTHOR]