Best Viewed in Mozilla Firefox, Google Chrome

Based on an exhaustive collection of terms from various sources, RiceVocs - A Compendium of Rice related vocabulary has been developed. This document along with Information Architecture is used for tagging purposes to make RKMP a semantic portal.

A (223) | B (143) | C (220) | D (158) | E (125) | F (108) | G (143) | H (127) | I (118) | J (5) | K (11) | L (94) | M (160) | N (76) | O (58) | P (263) | Q (13) | R (149) | S (335) | T (104) | U (23) | V (41) | W (52) | X (3) | Y (16) | Z (5)
sort icon
Agronomic characters

Agronomic characters

Agronomic methods of weed control

In any weed control system on crop land there is no substitute to good agronomic methods. They weaken the growth of weeds by crop competition and thus, indirectly help in improving the efficiency of other methods of weed control. Good agronomic methods involve (i) selective stimulation of crops, (ii) stale seedbeds, (iii) crop rotations, (iv) summer fallowing, (v) competitive cropping, and (vi) suitable time and method of planting crops.


Science of agriculture that deals with all aspects of field crop production and soil management. Agronomy is the science and technology of using plants for food, fuel, feed, fiber, and reclamation. Agronomy encompasses work in the areas of plant genetics, plant physiology, meteorology, and soil science. Agronomy is the application of a combination of sciences like biology, chemistry, ecology, earth science, and genetics.

Ahu rice

An early rice similar to "aus"; grown in assam, india.

AICRIP trial

The trail conducted under all india coordinated rice improvement project.


the albedo of an object is a measure of how strongly it reflects light from light sources such as the sun. Albedo is defined as the ratio of total-reflected to incident electromagnetic radiation. It is a unitless measure indicative of a surface's or body's diffuse reflectivity.

Albic horizon

A soil horizon from which clay and iron oxide have been removed (USDA, 1975).


A plant that lacks chlorophyll and turns white; a deficiency in normal pigment.

Aleurone layer

1) The peripheral layer of endosperm of the grain beneath the seed coat which envelops the endosperm and contains oil and protein. 2) It is a layer of high-protein cells surrounding the storage cells of the endosperm. Its function is to secrete hydrolytic enzymes for digesting food reserves in the endosperm.


Algae are a large and diverse group of simple, typically autotrophic organisms, ranging from unicellular to multicellular forms, such as the giant kelps that grow to 65 meters in length.

Alien gene

A gene transferred to the cultivated species from another related or unrelated species.


A small part or portion of a given amount (such as 5 ml out of 100 ml solution).

Alkali soil

A soil containing sufficient exchangeable sodium to adversely affect crop production. Its sodium adsorption ratio is greater than 15 and pH is > 8.5.

Alkali spreading value

The degree of spreading of six grains of milled rice in 10 ml 1.7 % KOH for 23 hours at room temperature or 30oC using a seven-point score (7=completely spread, and 1=no reaction). Gelatinization temperature of starch is estimated based on spreading value: low (6-7); intermediate (4-5); intermediate-high (3); and high (1-2).


Having a pH higher than 7.

Alkaline soil

A soil with a pH value higher than 7.0; CaCO3 in the upper horizon from a few percent to 95%. A soil containing sufficient exchangeable sodium to adversely affect crop production. Its sodium adsorption ratio is greater than 15 and pH is > 8.5. Alkali, or alkaline, soils are clay soils with high pH (> 9), a poor soil structure and a low infiltration capacity. Often they have a hard calcareous layer at 0.5 to 1 meter. Depth (in india this layer is called 'kankar'). Alkali soils owe their unfavorable physico-chemical properties mainly to the dominating presence of sodium carbonate which causes the soil to swell.


Alkalinity or at is a measure of the ability of a solution to neutralize acids to the equivalence point of carbonate or bicarbonate. The alkalinity is equal to the stoichiometric sum of the bases in solution.


Alkaloids are a group of naturally occurring chemical compounds which mostly contain basic nitrogen atoms. This group also includes some related compounds with neutral and even weakly acidic properties.


One of several possible mutational forms of a gene at a given genetic locus. One diploid individual can have a maximum of two forms (alleles), but there may be several alternate alleles in the species.


In Mendelian inheritance, a pair of alternative forms of a gene in which one may be dominant and the other recessive.

Alleles, multiple

A series of alleles (more than 2) that affect the development of a character.

Alleles, pseudo

Alleles that are functionally similar but structurally different.


The relationship between alleles in different parents. When the alleles of two parents belong to the same gene (locus), they are allelic; otherwise, non-allelic.

Allelism test (complementation test)

Allelism test (complementation test) - A test for determining whether changes occurred in the same gene so that complementation between genes is possible.


Non-nutritional substances produced by an organism that affect the behavior, growth, health, or physiology of another organism.

Alley cropping

The planting of crops such as maize or sorghum between trees.

Copy rights | Disclaimer | RKMP Policies