scholarly journals Agronomic Effectiveness of Phosphate Applied As Pyrophosphate for Corn in Calcareous Soils

2017 ◽  
Vol 10 (05) ◽  
pp. 49-55
Author(s):  
N. M. Muhawish
Keyword(s):  
Calcareous Soils ◽  
Agronomic Effectiveness

The Influence of Particle Size on the Agronomic Effectiveness of Agricultural Liming Materials

1993 ◽  
Vol 22 (3) ◽  
pp. 175-181
Author(s):  
Paul J.A. Withers
Keyword(s):  
Particle Size ◽  
Soil Acidity ◽  
Crop Yields ◽  
Chemical Reactivity ◽  
Calcareous Soils ◽  
Substantial Effect ◽  
Physical Factors ◽  
Short Term ◽  
Agronomic Effectiveness ◽  
Lime Reactivity

Periodic liming to maintain soil pH (the measure of acidity or alkalinity) is essential to achieve and sustain high crop yields on non-calcareous soils. Liming materials must meet certain specifications regarding their ability to neutralize soil acidity if they are to be sold within the EC. At present, the effectiveness of liming materials is assessed by analysis of their chemical reactivity or Neutralizing Value (NV). However, EC legislation is likely soon to require that methods of analysis also take into account the physical properties of liming materials: particle size, mineralogy and hardness are all physical factors that can Influence reactivity. In particular, particle size can have a substantial effect on lime reactivity in the short term. The significance of particle size as a factor in the overall effectiveness with which agricultural liming materials neutralize soil acidity is reappraised below.

Chemical behavior of fluid and granular Mn and Zn fertilisers in alkaline soils

Soil Research ◽  
2010 ◽  
Vol 48 (3) ◽  
pp. 238 ◽  
Author(s):  
G. M. Hettiarachchi ◽  
E. Lombi ◽  
M. J. McLaughlin ◽  
D. J. Chittleborough ◽  
C. Johnston
Keyword(s):  
Sandy Loam ◽  
Calcareous Soils ◽  
Isotopic Dilution ◽  
Alkaline Soils ◽  
Agronomic Effectiveness ◽  
Enhanced Diffusion ◽  
Incubation Experiments ◽  
Differential Behaviour ◽  
Enhanced Mobility ◽  
Potential Availability

The grain yield benefits of applying micronutrient fluid fertilisers over conventional granular products in calcareous sandy loam soils have been agronomically demonstrated. An understanding of the fundamental mechanisms and reactions occurring following application of these products to soils is critical to improve fertiliser management. We therefore examined the diffusion, solubility, and potential availability of manganese (Mn) and zinc (Zn) from both granular and fluid forms of Mn and Zn fertiliser in an alkaline calcareous and alkaline non-calcareous soil using laboratory incubation experiments in conjunction with an isotopic dilution technique with 54Mn and 65Zn. Enhanced mobility, solubility, and/or potential availability of Mn and Zn from fluid fertilisers were observed in comparison to Mn or Zn from granular fertilisers in both soils after 5 weeks of incubation. Differential behaviour of fluid and granular fertilisers for Mn and Zn appeared to be independent of their effects on soil pH. Most (~90%) of the Mn in granular fertiliser dissolved and diffused out of the granule but was retained within 4 mm of the point of granular placement, whereas most (~85%) of the Zn in the granular Zn fertiliser source remained in the granule. Our data suggest that the superior agronomic effectiveness of fluid Mn and Zn fertilisers observed in calcareous soils under field conditions may have resulted from the enhanced diffusion (Mn) and/or solubility/availability (Mn, Zn) of these micronutrients in soil when applied in fluid form.

EFFECT OF IRRIGATION AND GRASSING TO CHANGE SOME OF THE BIOLOGICAL PROPERTIES OF THE MINING OF BROWN CALCAREOUS SOILS

2019 ◽  
Vol 1 (1) ◽  
pp. 29-32
Author(s):  
Ruzimurod B. Boimurodov ◽  
Zebinisso Q. Bobokhonova
Keyword(s):  
Folic Acid ◽  
Humic Acid ◽  
Humic Acids ◽  
Rapid Growth ◽  
Growth And Development ◽  
Sharp Increase ◽  
Humus Content ◽  
Calcareous Soils ◽  
Biological Properties ◽  
Humus Accumulation

In this article is showing, that the irrigation mountain brown carbonate soils prone methods of irrigation and grassing comes the rapid growth and development of natural vegetation, which leads to intensive humus accumulation. Humus content in the upper layer is increased by 0.98% and a significantly smaller severely eroded. Increasing the amount of humus promotes accumulation mainly humic acids, that conducts to expansion of relations the content of humic acid: The content of folic acid. When grassing of soil traced sharp increase in the number associated with the related and R2 O3 humic acid.

Iron Deficiency Chlorosis and Seed Yield in Dry Edible Beans Grown on High-pH Calcareous Soils

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 444f-445
Author(s):  
J.W. Gonzales ◽  
D.P. Coyne ◽  
W.W. Stroup
Keyword(s):  
Iron Deficiency ◽  
Chlorophyll Content ◽  
Seed Yield ◽  
Calcareous Soils ◽  
Yield Reduction ◽  
Iron Deficiency Chlorosis ◽  
Breeding Lines ◽  
High Ph ◽  
The Third ◽  
Content Index

Iron deficiency chlorosis (FeDC) can cause significant seed yield reduction in dry beans (Phaseolus vulgaris L.) grown on high-pH calcareous soils. To determine the effects of FeDC on seed yield, and the effect of Fe-spray as a correction factor for FeDC, 22 breeding lines/cultivars were planted on high-pH (8.0), calcareous (3.2–3.5 calcium carbonate equivalent), and low-Fe (1.8–4.2 ppm DTPA) sandy clay loam Tripp soils at Mitchell and Scottsbluff in western Nebraska. A split-plot design was used with Fe treatments as main plots and breeding lines/cultivars as subplots. Three foliar sprays of Fe-EDDHA (2.4 kg·ha–1) were applied at V4, R5, and R7 dry bean growth stages, during 1996 and 1997. Leaf chlorosis was measured simultaneously by using a Minolta Chroma-meter (CIE L* a* b* color space system), a Minolta Chlorophyll-meter (chlorophyll content index), and by visual ratings (1 = normal green to 5 = severe chlorosis). In 1996 no significant Fe-spray × line interaction (P = 0.776) and Fe-spray effect (P = 0.884) on seed yield was observed. Breeding lines showed significant differences in seed yield (P = 0.0001) with WM2-96-5 being the highest-yielding line (4047 kg·ha–1). In 1997 a significant Fe spray × line interaction (P = 0.029) was observed. The cultivar Chase without Fe spray (3375 kg·ha–1), and lines WM2-96-5 (3281 kg·ha–1), WM2-96-8 (3171 kg·ha–1) with Fe spray were the highest yielding entries under those treatments. Differences in visual ratings after the third Fe spray in 1997 were significant (P = 0.004) for Fe spray × line interaction. In 1996 visual ratings were different only for breeding lines. Chlorophyll content index showed a significant Fe spray × line interaction after the second Fe spray (P = 0.022) and after the third Fe spray (P = 0.0003) in 1997.

Adaptation of Iron‐Efficient and ‐Inefficient Lovegrass Strains to Calcareous Soils 1

Crop Science ◽  
1982 ◽  
Vol 22 (3) ◽  
pp. 672-676 ◽  
Author(s):  
P. W. Voigt ◽  
C. L. Dewald ◽  
J. E. Matocha ◽  
C. D. Foy
Keyword(s):  
Calcareous Soils

Phosphorus Solubility in Sludge-amended Calcareous Soils

1986 ◽  
Vol 15 (3) ◽  
pp. 308-312 ◽  
Author(s):  
G. A. O'Connor ◽  
K. L. Knudtsen ◽  
G. A. Connell
Keyword(s):  
Calcareous Soils ◽  
Phosphorus Solubility
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