Ecology Calculators (Page 2)
Carbon footprint, energy use and other environmental calculations.
Par-To-Dli Calculator
Compute Ppfd, Photoperiod Hours, Dli from Ppfd, Photoperiod Hours, Dli. Free online Hong Kong ecology calculator.
Irrigation Water Requirement
Enter crop water need ETc, effective rainfall, irrigation efficiency and field area to compute net and gross irrigation depth and the actual supply volume (m³ and litres) for scheduling and water planning.
Seeding Rate
Enter target plant density, thousand-grain weight and germination rate to compute target plants/ha, seeds/ha and seed rate (kg/ha) for sowing planning and seed purchase.
Water Use Efficiency (WUE)
Enter yield (kg/ha) and seasonal water depth (mm) to compute water volume per hectare and water use efficiency WUE = yield ÷ volume (kg/m³), assessing irrigation output efficiency.
Grain-Moisture-Yield Calculator
Compute Measured Yield, Measured Moisture Pct, Standard Moisture Pct, Adjusted Yield, Dry Matter Yield from Measured Yield, Measured Moisture Pct, Standard Moisture Pct, Adjusted Yield. Free online Hong Kong ecology calculator.
Soil-Water-Storage Calculator
Compute Field Capacity Pct, Wilting Point Pct, Root Depth cm, Available Water mm from Field Capacity Pct, Wilting Point Pct, Root Depth cm, Available Water mm. Free online Hong Kong ecology calculator.
Crop Water Requirement (Kc)
Enter crop coefficient Kc, reference evapotranspiration ET₀ and stage days to compute daily crop evapotranspiration ETc and cumulative stage water requirement (mm and m³/ha) for irrigation planning.
Plant-Spacing-Density Calculator
Compute Direction, Row Spacing, Plant Spacing Or Density, Plants per Hectare, Plant Spacing, Plants per Square Meter, Area per Plant from Direction, Row Spacing, Plant Spacing Or Density, Plants per Hectare. Free online Hong Kong ecology calculator.
Nitrogen Fertilizer Requirement
Enter target nitrogen supply, fertilizer N content (%) and field area to compute the actual fertilizer amount per hectare and for the whole field (kg), for fertilization planning and cost estimation.
Irrigation Interval
Enter root-zone available water, management allowable depletion MAD and daily crop evapotranspiration ETc to compute usable water and the days between irrigations for scheduling.
Kc-Staged-Water-Need Calculator
Compute Reference Et0, Kc Initial, Days Initial, Kc Development, Days Development, Kc Mid, Days Mid, Kc Late, Days Late, Total mm, Total Cubic Meter per Hectare, Total Days from Reference Et0, Kc Initial, Days Initial, Kc Development. Free online Hong Kong ecology calculator.
Fertigation-Stock Calculator
Compute Stock Gram per Liter, Injection Ratio X, Diluted ppm, Diluted Gram per Liter from Stock Gram per Liter, Injection Ratio X, Diluted ppm, Diluted Gram per Liter. Free online Hong Kong ecology calculator.