Rice plants prefer absorption of fertilizer nitrogen in the form of_______.
Excessive N supply to plants promotes______________.
Mildew and rusts
Good “Indicator plant” for N deficiency is__________.
The phosphorus in cell membranes is mainly present as_________.
Phosphorus supply to plants promotes growth of____________.
Fibre as well as lateral roots
With an ample phosphorus supply to crops______.
Maturity period is delayed
Maturity period is early
Maturity period is unchanged
Phosphorus supply to crops influences the fungal disease incidences by__________.
Increase disease incidence
Decreasing disease incidence
No change in disease incidence
The optimum soil pH range for phosphorus availability to crops is_______.
5.0 - 6.0
6.0 - 7.0
7.0 - 8.0
Phosphorus deficiency in plant appears at first in___________.
Indicator plant for P deficiency indication is_______.
Potassium supply to plants has a favourable effect on_____.
Plants utilize potassium in the form of______.
Potassium deficiency symptoms in plants appear at first form________.
Lower most leaves
Upper most leaves
Potassium deficiency in plants in characterised by _________.
Indicator plant for monitoring K is_______.
Minerals are absorbed by the plants through_______.
Potassium is employed in________.
Opening and closing of stomata
Absorbed minerals are transported to other parts of the plants by________.
Down word passage of mineral, from upper soil layers to lower soil strata is called______.
Soil nitrate is more likely to leach than ammonium due to its__________.
Being useless to flora
Hydroponics is growing plants in__________.
Liquid culture medium
Which one of the following essential elements normally obtain directly from the air.
Most of the plants obtain nitrogen from the soil in the form of_________.
Free nitrogen gas
Major nitrogen fixation is carried out by_______.
Which one does not contribute to nitrogen availability in the soil?
Decay of organic matter
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