Acropetal Succession:

Refers to succession of opening of floral buds in an inflorescence, wherein peripheral flowers open & first followed by inner flower

Anti-transparent

A chemical having capacity to reduce the transpiration by plants, when sprayed at suitable concentration.

Adventitious Roots

Roots arising out of any part of plant mainly for support and absorption

Acaricide

A chemical used to kill mites.

Awnlessness

A stiff bristle like appendage occurring on the flowering glumes of glasses and careals is called awn. When it is arsent. It is called aWnlessness.

Aroma

Pleasant smell.

Allelopathy

It is direct/Indirect harmful effect that one plant has on another or mutuaily on each other thruugh the production of chemical compound that escape into environment

Anthocyanin

A pigment in leaf.

Alkaline Forming

The residual basicity caused by the use of commercial fertilizers is called as alkaline forming

Ammonification

The process in which ammonium compounds are formed by decomposition of nitrogenous organic compounds.

Alkalization

A process through which the exchangeable sodium on the exchange surface of soil particles is increased

Amonia Volatilization

In soil with low cation exchange capacity and high pH associated with high concentration of ammonia and high temperature, amonia gets lost in vapour form which is technically called as ammonia volatilization

Autotrophic:

Capable of utilizing carbon dioxide or carbonate as the sole source of carbon and obtaining energy for life processes from oxidation of inoranic elements or from radient energy Contrast is with heterotrophic.

Anion

An ion carrying a negative electrical charge like Cl2 SO4, CO3 etc.

Antibiotic

A substance produce by one species of organism that, in low concentrations will kill or inhibit the growth of certain other organism which is not desirable.

Adhesion :

It refers to molecular attraction which holds the surfaces of two substances in contact,that is water and sand particle.

Absorption:

The attraction of compounds to surface of a solid.

Aerobic Condition

It indicates presence of molecular oxygen as a part of the pore space with in the soil complex.

Anaerobic Condition

In refers to the condition of absence of molecular oxygen or free oxygen

Antagonistic Effect

In this the total effect of a combination is smaller than the effect of the most active component applied alone