Agri intelligence

Seed Rate Calculator

PLANT POPULATION/ESTABLISHMENT - HELP
Plant Population Estimator

When you know the actual sowing rate (Kg/Ha) and wish to calculate the theoretical plant population before doing an actual plant count:
  1. Enter the Actual Sowing Rate in Kg/ha,
  2. Enter the actual "thousand grain weight" (TGW) and germination % if you have them otherwise use typical values for the crop and variety.
  3. Make a best estimate of field losses which have resulted from slugs, sub-optimum seedbed conditions or other factors,
The calculator will display the Estimated Population (plants/m²) that you can then verify by doing an in-field plant count.

Plant Establishment Calculator

When you have done an in-field plant count and you want to work out how successfully your crop has established:
  1. Enter the Actual Sowing Rate in Kg/ha,
  2. Enter the actual "thousand grain weight" (TGW) and the germination % if you have them otherwise use typical values for the crop and variety.
  3. Enter the Actual Count (plants/m²). This should be based on the average of at least 10 representative sample counts.
The calculator will display the Actual Field Loss expressed as a percentage of the Target Population.
SEED REQUIREMENT PLANNER
Target population plants/m²
Thousand Grain Weight g/1000 seeds
Germination %
Field losses %
Crop area Ha
Sowing rate - Kg/Ha
Seed tonnage needed - Tonnes
Seeds sown - seeds/m²
SEED REQUIREMENT PLANNER - HELP
When you want to calculate the amount of seed to order (tonnes) for a field or cropping area:
  1. Enter the target plant population you are trying to establish taking into account varietal characteristics, weed competition, anticipated sowing date etc,
  2. Enter the actual "thousand grain weight" (TGW) and the germination % if you have them otherwise use typical values for the crop and variety.
  3. Make a best estimate of field losses which may occur due to slugs, sub-optimum seedbed conditions or other factors,
  4. Enter the field size or cropping area.
The calculator will display:
  1. The required Sowing Rate (Kg/Ha) which can be used to calibrate the seed drill,
  2. The total amount of seed you need to order,
  3. The actual number of seeds being sown to achieve the target plant population.
PLANT POPULATION/ESTABLISHMENT
Actual sowing rate Kg/Ha
Thousand Grain Weight g/1000 seeds
Germination %
Estimated field loss %
Actual count plants/m²
Estimated population - plants/m²
Actual field loss - %

SEED REQUIREMENT/DRILL CALIBRATION
User Information
User
Farm name
Postcode
Mobile
Email

Agronomic Information
Field name(s)
Crop
Variety
T(-1) Seed Treatments
Planned sowing date
Comments
Seed Requirement/Drill Calibration
Target Population - plants/m²
Thousand Grain Weight - g/1000 seeds
Germination 100 %
Field losses 0 %
Crop area - Ha
Sowing rate - Kg/Ha
Seed requirement - Tonnes
Seeds sown - seeds/m²

Clicking the button below will produce a PDF summarising all information. You can print or save this PDF for reference. We will retain some of the information for statistical research, but personal information will not be shared with any third parties. From time to time we may contact you with information about new products or services. If you don't want us to do this please tick the box
PLANT POPULATION/ESTABLISHMENT
User Information
User
Farm name
Postcode
Mobile
Email

Agronomic Information
Field name(s)
Crop
Variety
T(-1) Seed Treatments
Actual sowing date
Comments
Plant Population
Actual Sowing Rate - Kg/Ha
Thousand Grain Weight - g/1000 seeds
Germination 100 %
Estimated Field Loss - %
Actual Plant Count - plants/m²
Estimated Population - plants/m²
Actual Field Loss - %
 

Clicking the button below will produce a PDF summarising all information. You can print or save this PDF for reference. We will retain some of the information for statistical research, but personal information will not be shared with any third parties. From time to time we may contact you with information about new products or services. If you don't want us to do this please tick the box
Click here to visit the Apple App Store to download the Seed Calculator for iPhone (opens in a separate window) Click here to visit the Apple App Store to download the Seed Calculator for iPad (opens in a separate window) Click here to visit the Google Play Store to download the Seed Calculator for Android (opens in a separate window) Click here to visit the Windows Phone Store to download the Seed Calculator for Windows Phone 8 (opens in a separate window) Click here to visit Blackberry World to download the Seed Calculator for Blackberry 10 (opens in a separate window)

For more help or to enquire about seed availability:

Please consult your Agrii agronomist, local seed contact, or call our central seed team on Tel: 01277 898202