Agriculture Exams Library

2023-02-26 16:42:44 Plants nutrients: #Quick_Study

A. General classification:

1. Major or macro-nutrients:
Those nutrients which are required by the plants in concentrations more than 1 ppm are termed as major or macro-nutrients.

These are grouped in to:-
A. Basic nutrients: C, H, O Provides basic structure to plants.
B. Primary nutrient: N, P, K
C. Secondary: Ca, Mg, S

2. Minor or micro-nutrients:
. The elements which are required by plants in concentration less than 1 ppm are put in this category.
. They are also called as trace elements or oligo elements. These are Fe, Mn, Zn, Cu, Bo, Cl and Molybdenum

3. Immobile nutrients:
Ca& B

4. Energy exchange: H & O

5. Cation nutrients:
K, Ca, Mg, Fe, Mn, Cu, Zn

6. Anion mitrients:
P, B, Mo, Cl, So4

7. Both anion &cation form:
N (NH4+, NO3)

8. Nonmetals nutrients: B

B. Other classification of plant nutrients:

1. Essential nutrient:
. According to Arnon & Stout there are 16 essential nutrients for plants e.g. C, H,O, NPK, Ca, Mg, S, Fe, Mn, Mo, B, Zn, Cu, Cl.

. Nickel is the 17 essential element known in 1987 by Brown et al.

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2023-02-26 09:09:15 Nutrients & Thier Sources


Nitrogen (N):-
Organic matter

Phosphorus (P):-
Apetite and Al & Fe phosphate

Potash (K):-
Micas, Feldspar, Biotite

Calcium:-
Dolomite,Calcite

Magnesium(Mg):
Dolomite,Muscovite

Sulphur (S):-
Gypsum ,Pyrite, Organic matter

Iron (Fe):-Pyrite, Magnetite

Molybdenum (Mo):-Olivine

Boron (B):-Tournialine

Manganese:-Magnetite

Zinc ('Zn):-Sphalerite

Chlorine (Ci):-Apetite

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2023-02-26 04:41:42 New Mango varieties released by IARI

1. Pusa Surya: Regular bearer variety, suitable for closer planting and less susceptible to mango malformation. Released in 2002.

2. Pusa Arumina: Cross between Amrapalli × Sensation (USA variety)

3. Akshay: Selection from Dashehari

4. Sai Sugandha: Cross between Totapuri × Keshar, Regular bearer, free from malformation suitable for pulp making.

5 .Pusa Lalima: (released in 2012): Cross between – Dashehari × Sensation, Regular bearer

6. Pusa Peetamber (released in 2012) Cross between Amrapali × Lal Sinduri (oblong fruit shape)

7. Pusa Pratibha: Cross between Amrapali × Sensation. It has oblong shape. Released in 2012. It is Regular bearer.

8. Pusa Shreshth: Cross between Amrapali× Sensation. Released in 2012. Due to its elongated shape it is quite suitable for uniform packaging. Open / Comment

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2023-02-25 14:10:14 AGRO-FORESTRY
Agro-forestry is a sustainable land management system which increases the use of land, combines the production of crops, fruits, forest plants and or animals.

. It is also known as tree-crop planting system.

Components of agro forestry:

a. Agri-siviculture:
The growing of agricultural crops along with the forest crops is known as Agri- silviculture.
Agriculture crops+Forest crops (silviculture).

b. Sylvo-pastoral system:
Forests are managed for the production of wood as well as for rearing of domesticated animals.
Silviculture+Pasture management.

C. Agro-sylvo-pastoral system:
Agriculture crops+ Forest crops+ Pasture management.

d. Agri. Hoti-silvicultural system:
Agriculture crops+ Horticulture+Silviculture.

e. Agri-Silvi-Aquaculture System:
Agriculture crops+Forest crop+ Fish Production. Open / Comment

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2023-02-25 09:57:48 Irrigation projects are generally classified in the Indian context as under

Major project: This type of project consists of huge surface water, storage reservoirs and flow diversion structures. The area envisaged to be covered under irrigation is of the order over 10000 hectares. These projects are generally planned for multiple purposes like irrigation, hydro-power generation, water supply for drinking and industrial purpose, flood control navigation etc.

Medium project: These are also surface water projects but with medium size storage and diversion structures with the area under irrigation between 10000 hectares and 2000 hectares.

Minor project: The area proposed under irrigation for these schemes is below 2000Ha and the source of water is either ground water or from wells or tube wells or surface water lifted by pumps or by gravity flow from tanks. It could also be irrigated from through water from tanks.

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2023-02-25 07:12:27 ARRANGE YOUR AFO INTERVIEW LIST OF DOCUMENTS BEFORE INTERVIEW AS PER ABOVE ORDER Open / Comment