Agriculture and food tools
Soil, crops, food science and animals. 22 free tools, with no sign-up. Nothing you enter leaves your device.
Agronomy and soil science 7
- Fertiliser blend calculatorType the nitrogen, phosphate, potash (and sulphur) your field needs and the fertiliser grades you can buy, such as 46-0-0, 18-46-0 and 0-0-60. Get the amount of each product per hectare or acre, what is over or under supplied, totals and bags for the field, and the cost if you type prices. #381
- Soil test interpreterWork out how much lime raises your soil's pH, from CEC and base saturation, from a buffer capacity, or from your lab's lime factor, scaled to your depth and to your lime's neutralising value and fineness. Then see which nutrients are low, in range or high against the ranges you type. #382
- Irrigation schedulerPaste or open daily reference evapotranspiration (ET0) and rain, describe the soil and crop, and follow the root-zone water balance day by day: when the crop reaches its readily available water, how much to put back, deep drainage after big rain, stress days, and the water to pump. #383
- Seeding rate calculatorTurn a target plant population into seeds and kg (or lb) to sow from germination, purity, field emergence and seed weight, with seeds per metre or foot of row and the gap between seeds. Then count plants in a length of row or a frame to see the stand you got and your real establishment. #384
- Field trial designerLay out a field or glasshouse trial as a randomised complete block, Latin square or completely randomised design. Random but repeatable from a seed, checked, drawn as a plot map, and saved as a CSV field book. Nothing is uploaded. #385
- Yield trial ANOVA and LSDPaste or open your plot yields and get the analysis of variance for a randomised complete block, completely randomised or Latin square trial: F tests with p-values, CV %, standard errors, the LSD at 5 % or 1 % and letters that group the means. Nothing is uploaded. #386
- Sprayer calibration calculatorWork out a boom sprayer's spray volume from nozzle flow, travel speed and nozzle spacing, or the nozzle flow and pressure a volume needs. Check every nozzle with a catch test, use the 1/128-acre method, and see how far a tank goes and how much product goes in each tank for the label rate you type. #387
Horticulture and plant breeding 3
- Crossing plan and pedigree trackerEnter plants and their parents, and planned crosses. The tool checks the pedigree for loops and mistakes, works out every plant's inbreeding coefficient and the coancestry of any two plants (the inbreeding their offspring would have), draws the pedigree, and saves a crossing plan as CSV. Nothing is uploaded. #388
- Breeder's equation calculatorPredict the response to selection from heritability and the selection differential, or from the proportion selected (selection intensity) and the phenotypic standard deviation, per generation and per year. Estimate heritability from parent-offspring pairs or from families, lines or clones. Nothing is uploaded. #389
- Greenhouse heating and ventilation calculatorWork out a greenhouse's heat loss through the cover and air leaks, the heater size you need, the fuel it will burn over a season, and the ventilation needed to keep it cool in full sun: air flow, air changes per minute and number of fans. Nothing is uploaded. #390
Food science 6
- Recipe nutrition calculatorType or paste your ingredients with the values per 100 g from their packs, set the servings and the weight lost in cooking, and get a label-style table per 100 g and per serving, with energy from the labels or from the Atwater factors. Nothing is uploaded. #391
- Water activity and shelf-life estimator (Q10)Work out shelf life at another storage temperature with a Q10, fit Q10 and the Arrhenius activation energy to two or more accelerated shelf-life tests, and get water activity from equilibrium relative humidity or a Norrish-type equation. For study and planning. Nothing is uploaded. #392
- Thermal processing F-value calculatorFit a D-value to survivor counts and a z-value to D-values at several temperatures, work out the F needed for a log reduction, and add up lethal rates over a pasted time-temperature profile to get F0 or any F by the general method. For study. Nothing is uploaded. #393
- Brine, cure and fermentation salt calculatorWork out the salt for a brine by weight (of the brine or of the water), read salinometer degrees, salt a vegetable ferment by the equilibrium method, weigh a dry cure, and turn your own nitrite target into grams of curing salt. Nothing is uploaded. #394
- Sensory triangle and duo-trio test analyserAnalyse a sensory difference test from the number of answers and correct answers: exact one-sided binomial p-value, the fewest correct needed, Thurstonian d′ and the proportion of distinguishers, power and sample size, and a table of critical values worked out for any n. Nothing is uploaded. #395
- HACCP plan builderFill in a HACCP plan step by step: product description, process flow, biological, chemical and physical hazards at each step, the CCP decision questions, then critical limits, monitoring, corrective actions, verification and records for each CCP. Download it as PDF, Word or CSV. Nothing is uploaded. #396
Animal science 3
- Feed ration balancerEnter your feeds (dry matter, protein, energy, calcium, phosphorus and price) and your animal's daily requirements, and get the cheapest mix of feeds that meets every limit, found by linear programming, plus a Pearson square for two feeds. Nothing is uploaded. #397
- Breeding calendarType a mating date and get the expected due date with its window, the day for a pregnancy check and the dates to watch for heat if she does not hold. Paste a list of matings for a whole herd or flock and download it as a table (CSV) or calendar events (.ics). Nothing is uploaded. #398
- Body condition and growth curve trackerPaste or open your weigh records (animal, date, weight and optional body condition score) to get the average daily gain between weighings, fit Gompertz, logistic and von Bertalanffy growth curves with mature weight and growth rate, and see the body condition trend. Nothing is uploaded. #399
Veterinary science 1
Aquaculture 2
- Stocking density and FCR calculatorWork out the water volume of a tank or pond, the biomass and stocking density of your fish, how many fish fit a target density, the feed conversion ratio (FCR) and specific growth rate (SGR) over a period, the feed per day at a % of body weight, and when the fish reach harvest weight. Nothing is uploaded. #401
- Pond oxygen budget estimatorWork out dissolved oxygen saturation from temperature, salinity and altitude, then follow a fish pond's oxygen from dusk to dawn with your own fish, plankton and sediment rates and surface reaeration, and see how much aeration keeps the DO above your chosen minimum. Nothing is uploaded. #402
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