Soil physical properties and crop production in the tropics, R. Lal and D. J. Greenland (Eds) Wiley, 1979. No. of pages: 552. Price: -29.50

1980 ◽  
Vol 5 (4) ◽  
pp. 399-400
Author(s):  
Ken Atkinson
Keyword(s):  
Physical Properties ◽  
Crop Production ◽  
Soil Physical Properties ◽  
The Tropics

scholarly journals Surface lime and silicate application and crop production system effects on physical characteristics of a Brazilian Oxisol

Soil Research ◽  
2017 ◽  
Vol 55 (8) ◽  
pp. 778
Author(s):  
G. S. A. Castro ◽  
C. A. C. Crusciol ◽  
C. A. Rosolem ◽  
J. C. Calonego ◽  
K. R. Brye
Keyword(s):  
Physical Properties ◽  
Bulk Density ◽  
Production System ◽  
Crop Production ◽  
Management Practices ◽  
Production Systems ◽  
Crop Productivity ◽  
Soil Physical Properties ◽  
Physical Characteristics ◽  
Forage Crop

This work aimed to evaluate the effects of crop rotations and soil acidity amelioration on soil physical properties of an Oxisol (Rhodic Ferralsol or Red Ferrosol in the Australian Soil Classification) from October 2006 to September 2011 in Botucatu, SP, Brazil. Treatments consisted of four soybean (Glycine max)–maize (Zea mays)–rice (Oryza sativa) rotations that differed in their off-season crop, either a signal grass (Urochloa ruziziensis) forage crop, a second crop, a cover crop, or fallow. Two acid-neutralising materials, dolomitic lime (effective calcium carbonate equivalent (ECCE) = 90%) and calcium-magnesium silicate (ECCE = 80%), were surface applied to raise the soil’s base saturation to 70%. Selected soil physical characteristics were evaluated at three depths (0–0.1, 0.1–0.2, and 0.2–0.4 m). In the top 0.1 m, soil bulk density was lowest (P < 0.05) and macroporosity and aggregate stability index were greatest (P < 0.05) in the forage crop compared with all other production systems. Also, bulk density was lower (P < 0.05) and macroporosity was greater (P < 0.05) in the acid-neutralising-amended than the unamended control soil. In the 0.1–0.2-m interval, mean weight diameter and mean geometric diameter were greater (P < 0.05) in the forage crop compared with all other production systems. All soil properties evaluated in this study in the 0.2–0.4-m interval were unaffected by production system or soil amendment after five complete cropping cycles. Results of this study demonstrated that certain soil physical properties can be improved in a no-tillage soybean–maize–rice rotation using a forage crop in the off-season and with the addition of acid-neutralising soil amendments. Any soil and crop management practices that improve soil physical properties will likely contribute to sustaining long-term soil and crop productivity in areas with highly weathered, organic matter-depleted, acidic Oxisols.

TILLAGE PRACTICES ON A NORTHERN CLAY SOIL: EFFECTS OF SOD BREAKING METHODS ON CROP PRODUCTION AND SOIL PHYSICAL PROPERTIES

1986 ◽  
Vol 66 (3) ◽  
pp. 385-395 ◽  
Author(s):  
M. C. J. GREVERS ◽  
A. A. BOMKE
Keyword(s):  
Physical Properties ◽  
Soil Temperature ◽  
Crop Production ◽  
Soil Structure ◽  
Aggregate Size ◽  
Growing Season ◽  
Soil Physical Properties ◽  
Minor Effect ◽  
Tillage Practices ◽  
A Minor

Crop production in northern regions is mainly affected by a short growing season, and can also be further limited on heavy-textured soils by cool, wet spring conditions. Selected sod breaking practices were carried out resulting in maximum differences with respect to sod burial and soil physical properties. Soil physical properties measured included bulk density, air-filled porosity, aggregate size distribution, surface roughness and soil temperature. The main effects of the different tillage systems were: (1) differences in soil structure in terms of density and air-filled porosity, and (2) differences in the degree of residue incorporation. Moldboard plowing resulted in more favorable aeration porosity and soil temperature in spring than chisel plowing or discing. Rotovating prior to either moldboard plowing or chisel plowing had only a minor effect on soil physical conditions. In general the more effective the tillage was in incorporating crop residue and thatch, the higher was the subsequent soil temperature during the first 5 wk of the growing season. The differences in crop production followed the same trend as did differences in soil structure. This effect persisted through the third cropping season. Increasing levels of fertilizer N increased barley yields in all tillage treatments but did not offset the effect of physical differences caused by the tillage implements. Key words: Northern soils, tillage, soil temperature, soil structure, fertilizer nitrogen, barley

scholarly journals Implications of agricultural management on the epigeic fauna and soil physical properties of a clayey Oxisol

Revista CERES ◽  
2018 ◽  
Vol 65 (5) ◽  
pp. 443-449 ◽  
Author(s):  
Lidiane Martins da Costa ◽  
Marta Sandra Drescher
Keyword(s):  
Land Use ◽  
Physical Properties ◽  
Crop Production ◽  
Species Abundance ◽  
Total Porosity ◽  
Biological Properties ◽  
Soil Physical Properties ◽  
No Tillage ◽  
Pampa Biome ◽  
Tillage System

ABSTRACT The intensive use of land based on non-conservation practices contributes to the reduction of soil quality. In this sense, the objective of this work was to evaluate the influence of farming systems on clayey Oxisol in the northwest of the state of Rio Grande do Sul on the epigeic fauna and on the soil physical properties. The treatments were composed of land use with Native field, Pasture, Transition, Crop and livestock integration, No-tillage and No-tillage system. The epigeic fauna was evaluated by the installation of seven traps per treatment. The physical properties of density, total porosity, microporosity, macroporosity and soil resistance to penetration were evaluated in samples with undisturbed structure at the 0- 0.07, 0.07-0.15 and 0.15- 0.22m depths, with four replicates. The results indicated that land use only for crop production reduced the abundance of organisms in comparison to the crop-livestock integration. The conversion of the Pampa Biome to the crop system altered its soil physical and biological properties with the transition area presenting intermediate characteristics to both environments. Grazing in the remaining areas of the Pampa Biome, without native field improvement strategies, reduced species abundance and richness. No-tillage and No-tillage system promoted the compaction of the 0.07 -0.15 m layer in a clayey Oxisol.

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