Fertilizer calculations per hectare

Using my Nutrient Calculator with Commercial Fertilizers

Find and Compare the best Products from Leading Brands and Retailers at ProductShopper now. Discover the Best Online Product Comparison Site now. We make Shopping Online Easy and Fu (calculation A), then use calculation D to work out the cost per hectare. When a fertiliser has two or more of the desired nutrients, use the nutrient in least supply in the fertiliser for the calculation for rate. Calculation D. Cost per ha = cost/tonne x rate kg/ha (from A) ÷ 1000 Example: In the paddock you need 20 kg/ha N and 20 kg/ha P

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Question 2 calculations There are a couple ways to approach this. Figure out how much fertilizer is applied per acre: 7,692 #26-4-8 / 25 ac = 307.7 #26-4-8/ac Now calculate how much elemental P and K are applied in 307.7 #26-4-8/ac Step 1: Divide kgs N per hectare by 10,000. This is the kg needed per square meter. (60 kg N/ha) ÷ 10000 Sq. m = 0.006 kg N/Sq. m. Step 2: Multiply by square meter to fertilize. This is the kg of nitrogen needed. (0.006 kg N/Sq. m) X (15 Sq. m) = 0.09 kg N. Step 3: Divide the percent N in the fertilizer by 100 If you do not have a 46-0-0 fertilizer or would like the units expressed differently (kg per hectare or kg per 500 square meters), the calculator can adjust the recommended rates for whichever type of fertilizer you do have. Lets assume the following for an example: The soil report recommends 1 kilogram 46-0-0 per 100 square meters

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Which nutrients did he apply? At what rate per hectare? The first number of the fertilizer grade is the percentage of nitrogen in the fertilizer (12%). The second number refers to the percentage of phosphorus as P 2 O 5 (61%) Calculating the nitrogen application rate: 80 = N x 100 / 12. N = 80 x 12 / 100 = 9.6 kg per 5 hectares or 9.6/5 = 1.92. The standard size of a bag of fertilizer is fifty (50kg) Kilogram. Fertilizers are recommended in kilogram per hectare One hectare equals 10,000sqm 100kg of any fertilizer goes on one hectare Occasionally, fertilizer recommendations given as lb nitrogen per 1000 sq ft must be converted to lb fertilizer per acre. Example You are treating a large sports turf complex and would like to determine how many lb of a 16-8-8 fertilizer should be applied per acre if the recommendation calls for 0.75 lb nitrogen per 1000 sq ft Fertilizer consumption (kilograms per hectare of arable land) Food and Agriculture Organization, electronic files and web site. License : CC BY-4.0. Line Bar Map. Label

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Fertilizer consumption (kilograms per hectare of arable land) Definition: Fertilizer consumption measures the quantity of plant nutrients used per unit of arable land. Fertilizer products cover nitrogenous, potash, and phosphate fertilizers (including ground rock phosphate). Traditional nutrients--animal and plant manures--are not included Well then you have to use the estimated p uptake of the crop. For instance it has been determined that tomatoes use approximately 0.75 kg P per ton yield. So if you expect a yield of 100 tons/ha, then you should add 100 x 0.75 = 75 kg P/ha

Calculating Fertilizer Rates from Nutrient Recommendations Soil test recommendations are given in lb/ac or kg/ha of nutrients. To determine the fertilizer rate for a particular nutrient, multiply the rate of the desired nutrient by 100 and divide by the percentage of the nutrient in the fertilizer. Example Calculate NPK: This calculations can help you find out how much nutrient values of fertilizers you are applying to the turf, garden or farm. Before you apply fertilizer to them, you should have your soil tested. This will also help you determine what balance of fertilizer numbers will be appropriate for soil needs and deficiencies.Most fertilizer application rate recommendations are given in. In Uzbekistan, the rate of application of fertilizers per hectare on grain crops in the past reached nearly 250 kg/ha; today it is about 180 kg/ha. Farm managers as a rule consider that it is unprofitable to apply the average recommended rates of fertilizer application if the ratio between the expenditure and the profit is not at least 1:2 to 1:3 Pesticide and fertilizer recommendations are often made on a pounds per acre and tons per acre basis. While these may be applicable to field production of many crops, orchardists, nurserymen and greenhouse operators often must convert these recommendations to smaller areas, such as row feet, square feet, or even per tree or per pot. Thus pints, cups, ounces, tablespoons and teaspoons are the. This Fertiliser Calculator compares the nutrient content of more than 1500 commercially-available fertilisers. A Dashboard tab is made visable when a DAFWA is obtained. This tab allows development of more detailed and personalised fertiliser schedules. Alternatively, the Quick Calculator allows you to select one fertiliser from a list of products or a custom blend with no required

Fertilizer Containing a Single Nutrient. Calculating the cost per pound of a nutrient in a fertilizer containing a single element is relatively simple, and the following calculations are provided as examples 1.Similar procedures can be used for any fertilizer containing one plant nutrient Calculation of fertilizer dosage Example for field crops fertilization The following fertilization recommendation has been given a farmer growing a drip- irrigated squash crop: Basic dressing (as pre-transplant application) of 60 Kg N, 120 Kg P 2 O 5 and 70 Kg K 2 O per hectare

50 x 13 / 100 = 6.5 kg N per hectare 50 x 46 / 100 = 23 kg K 2 O per hectare Water Soluble fertilisers are treated as granular fertilisers. However, where application rates are in kg / ha, use the following formula. Convert U.S./Imperial to Metric 3. Liquid Fertilisers Application rate (in litres per hectare) x Specific Gravity of the liquid = Maize Fertilizer Requirements Per Acre. The amount of fertilizer required is best calculated by multiplying the target yield in tons per hectare, by 20-25 Kg. For a 30 bag per acre crop this is 160 Kg of nitrogen. Click to see full answer Lawn Fertilizer Calculator Enter the size of your lawn here: square feet. Don't know click here. Fertilizer. Good maintenance type fertilizers should be in a 3-1-2 ratio of nitrogen (N) to phosphorus (P) to potassium (K). An example of a 3-1-2 ratio fertilizer would be a 15-5-10 or something relatively close to this

General fertilizer calculation by compound metho

NPK Fertilizer Calculato

  1. Table 2. Fertilizer Densities (ounces per cup) Used to Make Volume Calculations for Fertilizer Rates (densities are for dry, loose, not packed or tamped, unless otherwise noted; blended fertilizers vary in density based on what products are used to make the blend) Nitrogen Sources. 46-0-0 (Urea) Ammonium Sulfate (21-0-0-24S) Prilled. Granular.
  2. Note 1 - To calculate stocking rate as kg/ha Org N, allow 85 kg of Org N per for every 1 LU/ha Note 2 - To calculate concentrate feed used in t/ha, divide the total concentrate feed used on the farm (t) by the total grassland area (ha
  3. Common Fertilizer Calculations Authored by Mark Reiter, Associate Professor and Extension Soils and Nutrient Management Specialist, Eastern Shore bushel to kilogram per hectare Multiply bu/acre by 67.19 Bushel per acre (bu/acre) for 56 lb. bushel to kilogram per hectare
  4. Top Three Highest Fertilizer Consumption State Per Hacter. 1st. 2nd. 3rd. Punducherry. Telangana. Punjab. STATE-WISE PER HECTARE CONSUMPTION OF FERTILISER (N+P+K) (In Kg Per hacter) Department of Agriculture Given Data Now 2016-17 this Data Important For All Agricultural Exam

how much fertilizer to apply in your garden plot can be challenging as fertilizer recommendations are typically given for large areas (i.e., pounds per acre or per 1000 square feet). Gardeners and urban farmers often must convert these recommendations to much smaller areas, sometimes just a few square feet or even for a single container or pot Fertilizer imports 15 4. Fertilizer exports 18 Consumption per hectare of crop 24 2. Consumption per hectare of agricultural land 25 iv . v An example of the nutrient content calculation for fertilizers 9 4. Manufacturers monthly report 13 5. Central agency monthly report 1

Calculating Fertilizer Application Rates - YouTube

How to calculate fertilizer application rates Cropai

Fertilizer Calculations. The basic principle we follow is that 1 ppm equals 1 mg/L. (This is an inherent property of This means when we are conducting fertilizer calculations we will need to multiply the mg of fertilizer salt per 1 L of water value times the volume of the stock tank and times the injector ratio This publication is designed to help growers make these calculations and conversions and to provide other data useful in the management, planning and operation of horticultural enterprises. A number of formulas for calculating fertilizer application rates on a parts-per-million basis are given. Tables for fertilizer injecto The application of fertilizer per hectare in some eleven countries is above the average of All India consumption like Egypt 400.1 kg, Japan 365.4 kg, Belgium-Luxemburg 275.9 kg, France 193.5 kg, United Kingdom 130.3 kg, Italy 122.7 kg, Bangladesh 81.0 kg, Yogoslovakia 72.0 kg, Pakistan 67.2 kg, China & India 60.9 kg Fertilizer Calculation Worksheet Background Review The fertilizer elements are present in various compounds (e.g., urea, ammonium nitrate, phosphoric acid, calcium phosphate, potassium chloride). The composition by percentage of each of the 'big 3' elements present in the fertilizer must be stated on th

Nutrient recommendation / % nutrient in the product expressed as a fraction =. 100 / 0.08 = 1,250 lbs. This means Kara would need to apply 1,250 lbs/acre of a 4-8-4 fertilizer in order to satisfy the phosphorus demands of her crop and soil. She could also do this same calculation for N and K Fertilizer Calculations. If a recommendation requires a complete fertilizer, any complete fertilizer of the same ratio can be used. Example: 10-10-10 (1-1-1 ratio) can be used for 8-8-8. 5-10-15 (1-2-3 ratio) can be used for 7-14-21. A common recommendation for turfgrasses is to apply 1 pound of nitrogen (N) per 1,000 square feet This calculator computes the pounds of a given fertilizer required, based on the nutrient ratio of the fertilizer (the three numbers prominently displayed on the fertilizer label, sometimes called the N-P-K ratio) and the pounds of nitrogen (N), phosphate (P2O5), and potash (K2O) necessary for a given area, as stated in a reliable soil test Re: Fertiliser Calculations. Originally Posted by saltoun. A unit is 1 cwt/acre multiplied by the % of each ingredient written on the bag.So 1cwt per acre of 16 16 16 fert is 16 units of N,16 units of P and 16 units of K per acre.You have applied 1.2 cwt per acre so that gives 1.2 times 16 units each of NPK .Which is 19.2 units each of N,P and K Typically, use rates for lawn care products are stated per 1000 square feet or per acre. Rates for flowers, shrubs, and vegetables often are given per 100 square feet. To determine how much pesticide or fertilizer is needed to do a job, first calculate the size of the area to be treate

The weight per gallon of the fertilizer (B) How many pounds of Nitrogen you want to apply per acre (C) The total number of acres in the field (D) Calculations: Pounds of Nitrogen per gallon of fertilizer (E) = A x B; Gallons of fertilizer required to deliver desired amount of Nitrogen to one acre (F) = C / The fertilizer rate per linear bed foot can then be calculated by dividing the fertilizer rate per acre by the linear bed foot per acre. The table below does these calculations for you based on your bed spacing and the fertilizer rate per acre. Find your bed spacing in the left column and follow it across to the cell that corresponds to your.

This means we have to apply twice as much fertilizer, or 30 to 40 kg of N per hectare, to produce an extra ton of grain! This example uses 15kg as needed N uptake. The needed N crop uptake ranges from 15 to 20 kg N per ton of grain/hectare. These calculations assume nitrogen is the major factor limiting yields Recommendations may come in different units, including pounds of fertilizer per 1000 square feet, pounds per acre, or kilograms per hectare, but the calculation is the same regardless of units. 1. Calculate fertilizer application rate. To calculate fertilizer application rate, use the formula Throughout, equations use imperial U.S. units, and sample calculations are provided in both imperial and metric units. Be sure to double-check all units and unit conversions. 160 kg N fertilizer per hectare (Fertilizer_N) 12.5 t/hectare corn grain, at 15.5% moisture (Crop_Yield

How To Calculate Fertilizer Application Rate For Any Crop

  1. Parts per million of desired nutrient to ounces of fertilizer carrier in 100 gallons of water calculating fertilizer application rates on a parts-per-million basis are given. Tables for fertilizer injector 0.40 hectare (ha) 2.59 square kilometer (km ) 2. Tables 4 through 7
  2. 400 kg per hectare with no fertilizer, a yield of around 600 kg per hectare could be expected with microdosing. A common recommendation for microdosing sorghum is to apply 4 kg P per hectare (equivalent to 9.2 kg P 2 O 5). Three examples of how this can be achieved are: Example
  3. An interesting and important question. Wonder as to why no farmer as the consumer wants to know this simple data. Such live data on the usage pattern in terms of type and cost per acre for every crop, every season and every district is simply NOT.
  4. Fertilizer grade is an expression referring to the legal guarantee of the available plant nutrients expressed as a percentage by weight in a fertilizer, e.g. a 12-32-16 grade of NPK complex fertilizer indicates the presence of 12 % nitrogen (N), 32 % phosphorous (P2O5) and 16 % potash (K2O)
  5. Various units are used to measure the amount of water applied to an area for irrigation. Here are some conversions between the common metric and imperial units. m3 from/to acre-in. cubic meter, m 3. acre-inches, acre-in. m3/h from/to ft3/s. cubic meter per hour, m 3 h-1. cubic feet per second, ft 3 s-1. m3/h from/to gal/m
  6. When you buy fertilizer, consider the cost per pound of the nutrient(s). Generally, higher analysis fertilizers and larger containers are less expensive. For example, a 50-pound bag of 10-20-10 may not cost any more than a 50-pound bag of 5-10-5 fertilizer, but the 10-20-10 bag contains twice the nutrients
  7. Filler - a material used to provide the fertilizer with the desired amount of nutrient per unit of weight, to make application easier, or to reduce the absorption of water from the air. Fertilizer recommendation - the amount (kg) of N,P. 2 O 5, and K 2. O recommended per hectare

By, Prof. Waghmode B.R. Assistant Professor, Agronomy, K.K. Wagh College of Agriculture, Nashi Recommendation might be to use 2 kg active ingredient (a.i.) of X pesticide per hectare i.e. 2 kgs. of pure (100%) X. A mount of actual formulation needed per hectare or acre. Recommendation is for 4 liters of Y 50% EC per hectare or another one for 2.5 lbs. of Y 80% WP per acre. Here two calculations are required Fertilizer Calculator. The completely offline soil test-based fertilizer recommender (STFR) app for Android. Get calculations according to the area of farm or the number of plants/trees. Choose your preferred unit of calculation: kg/hectare, kg/acre, kg/tree, lb/hectare, lb/acre, or lb/tree

Fertiliser Blend Calculator. Build and compare blends using the Dickie Direct Bulk Blend Calculator. Phone your Dickie Direct Area Manager to call and discuss your blend options - 0800434254. Please note all prices for goods and services are set at the date of despatch with exemption being when fixed prices have been specified in a Dickie. pH Stable. Rest assured your pH will remain exactly where you want it, and ensure that your plants will be able to maximize uptake without the worry of constant pH swings. Cost Effective. Buy your easy-to-use 2 -part cannabis specific fertilizer for as low as $0.01 and under per gallon of fertilized water

Calculations Used to Determine the Amount of Fertilizer

• Fertilizer recommendation - the amount (kg) of N,P2O5, and K2O recommended per hectare. 90+30+60 = 90 kg N, 30 kg P2O5, and 60 kg K2O per hectare application Classification of Fertilizer Materials According to form. 1. Natural organic - any fertilizer of plant and/or animal origin that has undergone decomposition Table 4: Phosphate fertilizer guidelines for soybean production in Minnesota. Yield goal. P soil test: 0-5 parts per million (ppm) Bray and 0-3 ppm Olsen. P soil test: 6-10 parts per million (ppm) Bray and 4-7 ppm Olsen. P soil test: 11-15 parts per million (ppm) Bray and 8-11 ppm Olsen

Dry fertilizer and its active ingredients are both gravimetric—in other words, expressed as a weight per area. For this type of fertilizer, the calculations are fairly straightforward. For example, 100 pounds of a 10-10-10 fertilizer-grade material contains 10 pounds each of active ingredients nitrogen (N), phosphorus (P 2 O 5), and potas. Farmers that generate organic fertilizer will receive a Rs. 10,000 per hectare subsidy from the Ministry of Agriculture. This was resolved during a meeting at the Ministry of Agriculture to discuss the production and delivery of organic fertilizer for the up coming Maha season Note - 11m3 per hectare = 1,000 gallons per acre. 4.5 tonnes (4,572 Kgs) of dungstead manure are the equivalent weight of 1,000 gallons of slurry. Guide values for the nutrient content of a range of farm slurries and manures is given below. Kg./tonne (units/1000 gls). Kg./tonne (units/tonne

SGS is a global leader in fertilizer analysis and fertilizer testing. Our fully-trained technical staff uses industry-standard fertilizer calculations and conversions to provide you with trusted, accurate and reliable results. SGS has earned a global reputation for the highest levels of integrity, independence and accuracy fertilizer rate for each crop and the expected effects on crop yields and net returns. Using the Tool when the financial constraint is moderate to high, the estimated net returns to fertilizer use are typically greater than twice as much as when fertilizer is applied to maximize net returns per hectare

Fertilizer consumption (kilograms per hectare of arable

FMP 211 :: Lecture 08 :: SOWING METHODS - SEED DRILLS, SEED CUM FERTILIZER DRILLS - COMPONENTS AND FUNCTIONS Sowing is an art of placing seeds in the soil to have good germination in the field. A perfect sowing gives. Correct amount of seed per unit area. Correct depth of sowing; Correct spacing between row-to-row and plant to plant Most of the fertilizer value of manure comes from phosphorus and potassium, Use your P 2 O 5 and K 2 O values from the laboratory manure nutrient analysis for all calculations requiring phosphate and potash. Nitrogen 1. Nutrient lb. per 1000 gal. x Thousand gal applied/acre = Nutrient lb./acre Your values:. For a random sample of 19 plots of land that used the fertilizer, the mean crop yield was 59 kilograms per hectare, and the standard deviation was 8.1. For a random sample of 18 plots that did not use the fertilizer, the mean crop yield was 23 kilograms per hectare, and the standard deviation was 5.3 Fertilizer use rates across Nigeria are not as sparse as one expect given nationally may cited figures of 13kg per hectare. Figure indicates that many farmers in Nigeria use some 1 inorganic fertilizer and in many states, some inorganic fertilizer is applied on over 75% of plots

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Average agricultural yield per hectare, of clients (who were smallholder farmers) of the organization during the reporting period. IRIS Metric Citation IRIS, 2021. Average Client Agriculture Yield: Smallholder (PI9421). v5.2. This metric is intended to capture the average output per hectare per smallholder farmer among an organization's clients The data show that both the input and output of Cd per hectare from fertilizers are negligibly small compared to the total amount of Cd/hectare usually present in the soil itself. Calculations based on current agricultural practices are used to show that it will take centuries to double the ambient soil Cd level, even after neglecting leaching. In the other countries, progress is illustrated in Figure 2, which shows fertilizer consumption in 50 African countries that have not met the Abuja target, over the 2001-2005 and 2010- 2014 periods. In this subset, fertilizer consumption per hectare has only increased by an average of 3 kg between these two periods, from 9 to 12 kg 40 Tonnes Per Hectare to Pounds Per Acre = 35687.1649. 10,000 Tonnes Per Hectare to Pounds Per Acre = 8921791.2162. 50 Tonnes Per Hectare to Pounds Per Acre = 44608.9561. 100,000 Tonnes Per Hectare to Pounds Per Acre = 89217912.162 Based on the nutrient content of a particular fertilizer, the amount of material to be applied has to be calculated. Let, the recommended fertilizer dose for lowland rice be 120, 60, 40 kg N, P2O5 and K2O per hectare, respectively. To supply 120 kg N/ha 100/46 x 120 = 260.9 kg or 261 kg urea is required. To supply 60 kg P2O5 = 100/16 x 60 = 375.

Caution must be used in calculating costs per ton or per acre because fertilizers do not contain 100 percent of any one nutrient (see Calculation Box 4). Calculation Box 4. Cost per pound of N and cost per acre of urea From your fertilizer bag, you determine the percentage of nitrogen to be 25%. Step 2. Your fertilizer recommendation is two pounds of nitrogen fertilizer per 1,000 square feet. Refer to Table 1. With a 25% nitrogen fertilizer (from Step 1), four pounds of fertilizer should be applied to achieve one pound of nitrogen per 1,000 square feet Fertilizer Recommendations by Crops, Categorized (Crop codes in parentheses) I Field Crops 1. (701) Canola Spring Type2. (702) Canola Winter Type3. (001) Corn (for Grain) Dryland4. (002) Corn (for Grain) Irrigated 150 bu/a29. (C01) Corn (for Grain) Irrigated 200 bu/a30. (C02) Corn (for Grain) Irrigated 250 bu/a31. (C03) Corn (for Grain) Irrigated 300 bu/ Your final fertilizer blend would be 291 pounds urea plus 58 pounds of MAP, for 349 pounds total product per acre. Anhydrous ammonia is a gas but a liquid under pressure. The liquid converts back.

How to calculate the fertilizer requirements from soil

Fertilizer Application Rate Calculator. I've made you this fertilizer application rate calculator to help you figure out how much of each organic fertilizer and microbial inoculant to use. Choose your products, area, and application frequency below and click 'Submit'. Feel free to ask questions down below.. 7. Calculate the seed requirement for upland rice for sowing 1 hectare of crop from the following: spacing=20cm×30cm germination %=95% purity percentage= 90% test weight =25g No. of damaged seeds by birds, which are to be replaced 10seeds per square meter i.e., 10/m² A = 1300. With these variables, you now find the number of bags of fertilizer needed with this formula: Bags = (AN)/ (10wn) Example Calculation: Suppose our soil test results indicate that we need to apply 0.9 lbs of nitrogen per 1,000 sq. ft., and suppose our lawn is 1,300 sq. ft. Also suppose we have a three-pound bag of fertilizer that is 28. The N-P-K ratio displayed on the bag, which for Pennington UltraGreen is 30-0-4, tells you the percentage of each of the three elements in the mixture, with the rest of the mixture being filler. If you want to apply 1 pound per 1,000 square feet of actual nitrogen to the lawn, you need 3.33 pounds of this product - solid fertilizer with spreader : 150 L/ha - solid fertilizer with seeder : 75 L/ha I don't have the numbers for corn, sunflowers, beets and potatoes, nor for manure and slurry yet, but when you seed a field, in the stats page of the PDA you have your seed usage for the session and the seeded surface, it's simple math to get the L /ha with tha

View Fertilizer Calculation Worksheet.docx from CROP SCIEN CAG3000 at Universiti Putra Malaysia. Fertilizer Calculation Worksheet CAG2013 Dip. Amount of fertilizers for 1 Hectare : Potassium = RM 0.90 per kg Gypsum = RM 10.91 per kg Cost fertilizer = N + P + K + Gypsum = (0.55 x 30.635 kg) + (2.02 x 30.635 kg) +. A fertilizer containing 20% P 2 O 5 has about 9% P (20% P 2 O 5 x 0.44 = 8.8% P) A fertilizer containing 10% K 2 O has about 8% K (10% K 2 O x 0.83 = 8.3% K) Note: Typically, you do not need to perform these calculations because fertilizer recommendations are almost always provided as pounds P 2 O 5 per 1,000 square feet and pounds K 2 O per. To determine the amount of urea required per hill Spacing: 5 m by 5 m Fertilizer: urea (46-0-0) Recommended rate: 92 kg per hectare Square meter per hectare: 10,000 Step 1: First determine number of hill per hectare (based on given spacing i.e., 5 m by 5 m). (10000 Sq. m) ÷ (25 Sq. m) = 400 hills per hectare Step 2: Nitrogen required per hill. (400 hills/ha) ÷ (92 kg N/ha) = 4.35 kg N/hill.

Experience has shown that to spray one hectare with a hydraulic nozzle sprayer in good working condition and a 15 liter sprayer, one will need 300 liters of solution, i.e. 20 sprayer loads. Example: To control grasses, 5 liter of propanil should be applied per hectare. Its mean. 1 liter = 1000 ml. 20 sprayers (15 L each) per ha. 5000 ml/ 20 = 25 1. To find the amount of liquid concentrate per gallon when label recommendations are given in pints per 100 gallons: teaspoons/gallon = recommended pints per 100 gallons x 1* or teaspoons/gallon = recommended pints per l00 gallons x 0.96 or milliliters/gallon = recommended pints per 100 gallons x 4.73* 2

Fertilizer Calculations for Attractive, Healthy LawnsUnit conversions tables | Cropaia【How to】 Calculate Plant Population Per Hectare

This is also reflected in Table where an increase of 8 kg ha-1 is actually recommended for the two-tonne yield increase per hectare. The similarity is however coincidental as the actual increase in the table is on the basis of crop removal and not a physical calculation from a production function B.2 FERTILIZERS APPLIED PER HECTARE FOR THE 5-YEAR PERIOD CROPPING On a per ha basis, for the common salt (sodium chloride) option, for the first three (3 years), an annual quantity of 246 kg/ha ( about 6 bags, 40 kg.bag) is required and 123 kg/ha (about 3 bags) for the next two years of the five (5) year cropping period (Table 1.2). For th 3000 m3 X 1.2 ton/m3 = 3600 tons (3968 short tons) Now, the amount of potassium in the soil can be calculated, using the definition for ppm. ]1ppm = 1 mg/kg. 3600 tons = 3600000 kg. We have 10 mg of potassium per kilogram of soil and therefore: 3600000 X 10 = 36000000 mg = 36 kg (79.3 lbs