soil alkalinity

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• Soil pH — is the pH of soil water. It is based on the measurement of pH, which depends on the activity of hydrogen ions (H+) in a solution.There are many different methods to collect soil water, all which influence the measured soil pH in one way or… …   Wikipedia

• Soil biodiversity — This discussion looks at the relationship of the soil to biodiversity, at some aspects of the soil that can be managed in relation to biodiversity, and raises some catchment management considerations.oil and biodiversityBiodiversity is “the… …   Wikipedia

• alkali soil — soil that has either a high degree of alkalinity or a high percentage of sodium, or both, so that most crops cannot be grown in it profitably. [1910 15] * * * alkali soil, soil containing soluble mineral salts, in quantities sufficient to… …   Useful english dictionary

• alkali soil — soil that has either a high degree of alkalinity or a high percentage of sodium, or both, so that most crops cannot be grown in it profitably. [1910 15] * * * …   Universalium

• Acid sulfate soil — Acid sulfate soils are naturally occurring soils, sediments or organic substrates (e.g. peat) that are formed under waterlogged conditions. These soils contain iron sulfide minerals (predominantly as the mineral pyrite) or their oxidation… …   Wikipedia

• Jackson-Sherman soil weathering stages — ▪ Table       Jackson Sherman soil weathering stages         characteristic minerals in soil clay fraction       characteristic chemical and physical conditions of soil       characteristic soil profile features early stage       gypsum,… …   Universalium

• Alkali soils — Alkali, or alkaline, soils are clay soils with a relatively high exchangeable sodium percentage, a relative high pH (> 9), a poor soil structure and a low infiltration capacity. Often they have a hard calcareous layer at 0.5 to 1 m. depth (in… …   Wikipedia

• gardening — /gahrd ning/, n. 1. the act of cultivating or tending a garden. 2. the work or art of a gardener. [1570 80; GARDEN + ING1] * * * Laying out and tending of a garden. Though palatial gardens existed in ancient times, small home gardens became… …   Universalium

• Drainage research — is the study of agricultural drainage systems and their effects to arrive at optimal system design. Contents 1 Aspects to be covered 2 Systems analysis 3 Crop response processes 4 …   Wikipedia

• pH — For other uses, see PH (disambiguation). Acids and Bases Acid dissociation constant Acid base extraction Acid–base reaction Acid–base titration Dissociation c …   Wikipedia

• plant disease — ▪ plant pathology Introduction       an impairment of the normal state of a plant that interrupts or modifies its vital functions.       All species of plants, wild and cultivated alike, are subject to disease. Although each species is… …   Universalium