AGR203

may be defined as a
protective covering over the
soil surface that is intended
to minimize evaporation
losses

stunted growth,Loss of
green color, yellow
discoloration of leaves from
tip backward, older leaves
brown all these are
deficiency symptoms of

3. Is not a macro nutrient

is commonly practiced with
respect to crops that are
planted in rows. It involves
tilling the areas between
the crop rows

One of this is not a tillage
practice

Grading and terracing are
done on

oxidation after tillage
facilitates
__Of nutrients

the practice where crop
production is carried out
with as little tillage or soil
disturbance as possible is
known as

tractors do not usually have
adjustable tread of
adequate clearance for row
crop operations

the process of neutralizing
acidic soil is referred to as

is the method the irrigation
where by water is applied to
the crop above the ground
surface in the form of spray.

maintaining more moisture
in the soil,increasing
surface roughness and
reducing wind velocity are
all measures of

An oxidised nutrient
becomes

Good soil aeration
facilitates

irrigation method, where
water is applied directly to
the soil surface from a
channel located at the
upper reach of the field is
known as

is used for making plates in
tractor batteries

Continuous use of
ammoniacal or ammoniumforming fertilizers on acidic
soil should be avoided as it
tend to make the soil

Is the procedure used for
removing excess emerged
seedlings.

the process of making hard
seed covering weaker or
pervious to water and
gases is referred to as

occurs when rainfall
intensity exceeds the
infiltration capacity of the
soil

The procedure of removing
excess emerged seedlings
is referred to as

When a living seed fails to
germinate even when
provided with the normal
conditions necessary for
germination, such a seed is
said to be

the most common form of
soil collection tillage in
tropical Africa is called

Calcium carbonate is used
to neutralize

Lossens the soil and result
in a seed bed suitable for
germination

Tillage is define as
changing the soil condition
with a
__for the benefit of Man

Is the most common tillage
implement used among
small scale farmers.

Aerobic and anaerobics are
classifications of

China is one of the riches
centre of

Good soil aeration
facilitates

All cultivated plants were
domesticated from their

Lossens the soil and result
in a seed bed suitable fof
germination

The conventional way of
breaking up soil lumps is
through

In order to prevent the
breakdown of soil
aggregates due to raindrop
impact, their aggregate
stability must be improved
by

Is the total amount of water
applied through irrigation

36. Cause litle injury to the corn

All these can be
incorporated into the soil
Through Tillage: Rocks,
Organic matter, Humus and
Weeds with the exception
of

occurs when rainfall
intensity exceeds the
infiltration capacity of the
soil

fertilizer which supply two
or three of the major plant
nutrient elements e.g.
nitrogen, phosphorus, and
potassium is called

the most ancient and most
universal forms of tillage is

is the effect of low
temperature on crops.

What is the effect of high
wind velocity on crops

43. Photo period is refers to

the most common tillage
implement among small
scale farmers is

All
Benefits from improved soil
earation

The crawler tractor is used
for
operations

Is not an impliment for bed
preparation

Is the process of
neutralizing acidic soil.

tractors are most suitable
for small operations

The premitive tillage tools
were made of the following:
Bones, Stones, Metals and
Wood with the exeption of