Factors affecting K fixation by
calcareous soils include content and type of minerals, mineral size, K depletion intensity and wetting-drying and freezing-thawing cycles (Dhaliwal et al.
Although a few portions of
calcareous tubes extend from lower areas up onto the bases of nodes, these segments are no more than a few millimeters in length and never wrap around lower portions of nodes, suggesting that such structures might have represented substrata that were not preferred.
In the area, this formation is composed of
calcareous from fine to coarse-grained cross-bedded glauconitic sandstone (Notestein et al., 1944); in very low proportion beds and thin laminated carbonaceous-micaceous shales and thin beds of laminated limestones can be observed (ECOPETROL, 2012).
Reattachment of fronds to the different substrates cultivated in the tanks was observed after 12 days through the mucilaginous union of the fronds to both substrates (
calcareous and rocky).
The lowermost Ragavere Formation (Torremagi Member) is fine-grained, bioclastic wackestone and the upper part (Piilse Member) is composed of
calcareous (lime-) mudstone (cryptocrystalline limestone).
The Bruce Peninsula National Park is much larger (15,600 ha plus Flower Pot Island in the Fathom Five National Marine Park instead of 2915 ha), it was examined by 30 lichenologists instead of one (with some assistance from others), it is further away (~ 120 km northwest), and it has a greater number of mesohabitats, such as
calcareous cliffs on the coast and in the forests, alvars, and two different coast lines, on Lake Huron and Georgian Bay (Parks Canada, 2010; Brodo et al, 2013).
Treatments involved the addition of a calcium source to the concentrate, either limestone (LI) (calcitic limestone, Iguatama, Brazil) or a product derived from
calcareous algae (CA) (Top buffer[R] Sanphar, Campinas, Brazil), with or without the presence of monensin (MO) (Bovensin[R] Phibro, Guarulhos, Brazil).
Exploration efforts will be focused upon four principal minerals: kaolinite sand,
calcareous shale, lead, and zinc.
The pH averaged between 7.6 and 7.9 in the
calcareous areas (RV, AP, HR, and BP), but it averaged 7.1 and 7.2 in the CP and PP, respectively.
Among their topics are the present status and prospects of salt stress and leguminous crops, an overview of the effect of pesticides on leguminous plants, microbial strategies for improving legume production in hostile environments, genetic and molecular responses of legumes in a changing environment, microRNA-mediated regulatory functions under abiotic stresses in legumes, and combating phosphorus deficiency on alkaline
calcareous soils by the adsorption isotherm technique for legume crops in arid environments.
The soils of Pakistan are
calcareous alkaline and poor in organic matter where the availability of nutrients is limited resulting in low crop yield per hectare.