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determine the term - essential elementit becomes difficult to meet all the conditions so as to establish essentiality this is particularly so for the
why plant nutrients said to be essentialan element is said to be essential if i the deficiency of an element in plant makes it
determine about the plant nutrients the primary source of energy for photosynthesis in plants is the sun a complete analysis of plants shows the
how do you explain the fact that clay soils which commonly have higher pore space than sandy soils are often more poorly aerated than sandy soilsclay
which class of microflora would you expect to be most active under following conditions i in rice paddies requiring nitrogen - blue-green
why are nematodes agriculturally very importantnematodes are the abundant soil microfauna being predatory and saprophytic in nature they cause a
explain why earthworms are said to be the most important soil animalsearthworms ingest organic matter as well as soil where they mix granulate and
differentiate between soil water content and plant available soil moisture the mass of water lost relative to mass of dry soil is called soil
how soil textural classes categorised and what are is their significance the soil textural classes are based on the percentage of the separates which
what are the disadvantages of alkaline soilsas most of the plants can assimilate nitrogen in its nitrate form and oxidation of ammonium fertilizer
explain the direct and indirect effects of lime applicationthe direct and indirect effects of lime application to acid soils generally are increased
define the uses of buffer methodthe buffer method of shoemaker and coworkers for determining lime requirement is being widely used in india in this
determine the term - soil moisturethe higher the soil moisture the more rapid is the rate of reaction the quantity of liming material to be applied
state the process of limingmiddot affects the solubility and availability of most of the plant nutrients and raises the level of
define the process of soil acidityacid soils are made more suitable for agricultural use by liming which raises the soil ph soil acidity is
explain the term liming - decreasing soil acidityacid soils can be managed in two ways viz either by growing crops suitable for particular soil ph or
state the harmul effects of acidity of soil acidity of soil may have harmful effects on plants due to the effect on enzymatic changes reduced
what are the advantages of acid soils the acid soils formed by any of the above processes behave as very strong acids so much so that ph is quite low
state the process of formation of acid soilsthe soil acidity is mainly caused by hydrogen and aluminium ions depending upon the degree of existing
determine how ion exchange data is helpfulthe ion exchange data is helpful middot in soil management middot indicating nutrient
illustrate the physical and chemical properties of soilthe cation exchange property is very significant because it affects the physical and chemical
what is cecthe cec of most soils increases with ph below ph 60 the charge for clay mineral is relatively constant while above ph 60 the charge on the
ion exchange property of soilsion exchange is a reversible process soil has capacity to exchange its ions due to its colloidal property the water
determine about the silicate claysthe silicate clays develop charges because of an imbalance which takes place due to an exchange of one cation by
determine the architectural units of silicates this common architectural unit sio44- of silicates is of remarkable stability the different silicates