Field Inspection

Field Inspection

Inspection of the standing crop is an essential step in verifying conformity of seed crop to prescribed minimum seed certification standards (see Annexure-III). All the registered seed production fields will be inspected by qualified, trained and experienced officers of the Agency.

Verification of all factors affecting seed quality in the field may not normally be possible in a single inspection as all the factors in the field may not be apparent or may not occur at the same time or all of them may not affect seed quality at the same stage of crop growth. Hence, two or more inspections phased to cover all the important stages of crop growth. The number of inspections and the stages of crop growth vary from crop to crop depending on the crop duration, pollination behaviour, susceptibility to contamination, disease susceptible stages, nature of the contaminating factors,etc.,(see Crops based on Pollination).

    Accordingly, field inspections of seed plots are conducted at -
a) Vegetative or pre-flowering stage

b) Flowering stage

c) Post-flowering and pre-harvest stage.

Field inspections at vegetative or pre-flowering stages are done to

  • Confirm the actual acreage sown / planted by comparing it with the acreage allotted or for which the application was submitted, and to record the excess area if any and confirm actual date of sowing/planting.

  • Verify, seed crops involving two different parents, whether the grower has followed the recommended planting ratio with border rows and marked the each male row at the end ;

  • Verify the presence of any contaminant within the prescribed isolation distance, guide the grower in solving the isolation problem if any and advise the grower to remove the same before flowering (See Isolation Distance).

  • Advise to remove the off types on the basis of morphological characters.

  • Guide the grower to adopt correct method and procedure of detasseling in maize..

Inspections during flowering stage are done to

  • Check the presence and removal of pollen shedders in hybrid bajra, sorghum, sunflower etc., and off types, objectionable weeds, diseased plants, inseparable other crop plants etc.,

  • Ascertain in seed fields involving two parents, for adoption of correct planting ratios and marking the ends of male rows.

  • Examine the possibility of any contamination with in the isolation distance and determine the area to be rejected due to inadequate isolation.

  • Guide the grower in solving nicking problems wherever applicable.

  • Verify morphological characters of the crop.

Inspection at post-flowering and pre-harvest stages is done to

  • Confirm that the observations on planting ratios, planting of border rows, off types, detasseling of maize, removal of pollen shedders in hybrid bajra, sorghum, sunflower etc., during previous inspections are reasonably accurate and the defects in these factors had not escaped attention in earlier inspections.

  • Confirm that the grower had attended to roguing after the inspection at flowering.

  • Verify whether the contaminating factors, objectionable weed plants and diseased plants/ heads are removed.

  • Educate the grower about harvesting technique, give guidance regarding the care to be taken during harvesting, threshing and transportation, and yield assessment (approximate).

 

Field Counts
The number of counts taken and the method of taking counts vary from crop-to-crop. Normally
in all crops five counts are taken for an area upto 5 acres, and an additional count taken for each
additional five acres as given below:
Area of the field crops (acres)                                            No. of counts to be taken
0 – 5                                                                                                   5
6 – 10                                                                                                6
11 -15                                                                                                  7
16 – 20                                                                                                8
21 – 25                                                                                                 9
In any inspection, if the first set of counts shows that the seed crop does not conform to any one
of the prescribed standards (factor), a second set of counts should be taken, to ascertain the
conformity. However, second set of counts is not necessary when a particular factor shows twice
the maximum prescribed during the first set of counts. Two sets of counts are called double
counts.
Note : All the observations during the field inspections should be recorded in the prescribed field
inspection reports (FIRs). The FIRs are common for all the crops and also for all the inspections.