SIST EN 13739-2:2004
(Main)Agricultural machinery - Solid fertilizer broadcasters and full width distributors - Environmental protection - Part 2: Test methods
Agricultural machinery - Solid fertilizer broadcasters and full width distributors - Environmental protection - Part 2: Test methods
This European Standard specifies methods to test mounted, trailed and self-propelled broadcasters and full width solid fertilizer distributors used in agriculture and horticulture.
This European Standard does not apply to machines which are:
combined grain and fertilizer drills; or
equipment for distributing granulated pesticides; or
solid fertilizer line-distributors (which are dealt with in prEN 13740-1 and in prEN 13740-2).
If the term 'machine' is used it shall cover both full width distributors and broadcasters, except in the definitions.
Landmaschinen - Ausleger- und Wurf-Mineraldüngerstreuer - Umweltschutz - Teil 2: Prüfmethoden
Diese Norm legt Prüfmethoden zur Überprüfung von angebauten, gezogenen und selbstfahrenden Ausleger- und Wurf-Mineraldüngerstreuern fest, die in der Landwirtschaft und im Gartenbau eingesetzt werden. Die Norm gilt nicht für Maschinen mit: - kombinierten Drillmaschinen/Düngerstreuern; - Ausrüstung zum Ausbringen von granulierten Pestiziden. Wenn sowohl Ausleger- als auch Wurf-Mineraldünger gemeint sind, deckt der Begriff "Maschine" beide ab.
Matériel agricole - Distributeurs d'engrais solides en nappe et centrifuges - Protection de l'environnement - Partie 2: Méthodes d'essai
La présente Norme européenne spécifie les méthodes d'essai des distributeurs d'engrais solides en nappe et centrifuges portés, tractés ou automoteurs, utilisés en agriculture et en horticulture.
La présente Norme européenne ne s'applique pas :
3 aux semoirs combinés pour grains et engrais ; ou
3 au matériel de distribution de pesticides en granulés ; ou
3 aux distributeurs d'engrais solides en lignes (qui sont traités dans les prEN 13740-1 et
prEN 13740-2).
Des lors que le terme "machine" est utilisé, il concerne a la fois les distributeurs en nappe et les distributeurs centrifuges, sauf dans les définitions.
Kmetijski stroji – Odlagalni in metalni trosilniki mineralnih gnojil – Varovanje okolja – 2. del: Preskusne metode
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kmetijski stroji – Odlagalni in metalni trosilniki mineralnih gnojil – Varovanje okolja – 2. del: Preskusne metodeLandmaschinen - Ausleger- und Wurf-Mineraldüngerstreuer - Umweltschutz - Teil 2: PrüfmethodenMatériel agricole - Distributeurs d'engrais solides en nappe et centrifuges - Protection de l'environnement - Partie 2: Méthodes d'essaiAgricultural machinery - Solid fertilizer broadcasters and full width distributors - Environmental protection - Part 2: Test methods65.060.25JQRMLYEquipment for storage, preparation and distribution of fertilizers13.020.99Drugi standardi v zvezi z varstvom okoljaOther standards related to environmental protectionICS:Ta slovenski standard je istoveten z:EN 13739-2:2003SIST EN 13739-2:2004en01-januar-2004SIST EN 13739-2:2004SLOVENSKI
STANDARD
SIST EN 13739-2:2004
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13739-2March 2003ICS 65.060.25English versionAgricultural machinery - Solid fertilizer broadcasters and fullwidth distributors - Environmental protection - Part 2: TestmethodsMatériel agricole - Distributeurs d'engrais solides en nappeet centrifuges - Protection de l'environnement - Partie 2:Méthodes d'essaiLandmaschinen - Ausleger- und Wurf-Mineraldüngerstreuer- Umweltschutz - Teil 2: PrüfmethodenThis European Standard was approved by CEN on 20 December 2002.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13739-2:2003 ESIST EN 13739-2:2004
EN 13739-2:2003 (E)2ContentspageForeword.31Scope.42Normative references.43Terms and definitions.44Test conditions.44.1Machine for test.44.2Test materials.54.3Application rates.55Test equipment.65.1Accuracy in weighing measurements.65.2Devices for receiving fertilizer for transverse distribution.65.3Test site.65.4Handling of test materials during the tests.76Test methods.76.1Contact with obstacles.76.2Estimation of hopper volume – Checking of the spillage.76.3Adjustment of flow rate.76.4Reduced working width or throwing width.86.5Flow rate regulation system, when available (see example in Figure 1).86.6Evenness of transversal distribution.96.7Evenness of transverse distribution near the field edge.106.8Evenness of transverse distribution when spreading with equipment for top-dressing.106.9Deviation of the obtained flow rate from the intended flow rate.116.10Evenness of obtained flow rate.117Calculation and presentation of test results.117.1Transverse distribution.117.2Flow rate.158Test report.15Annex A (normative)
Determination and specification of physical properties of test materials.16Annex B (informative)
Example of a fertilizer – collecting container.17Annex C (informative)
Example of a test report.18Bibliography.27SIST EN 13739-2:2004
EN 13739-2:2003 (E)3ForewordThis document (EN 13739-2:2003) has been prepared by Technical Committee CEN/TC 144 "Tractors andmachinery for agriculture and forestry", the secretariat of which is held by AFNOR.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by September 2003, and conflicting national standards shall be withdrawn at thelatest by September 2003.This European Standard consists of the following parts under the general title Agricultural machinery - Solidfertilizer broadcasters and full width distributors - Environmental protection:¾ Part 1: Requirements¾ Part 2: Test methodsAnnex A is normative and concerns the identification of the physical properties of fertilizer used in the test.Annexes B and C are informative and give an example of the collector container and the format for the test report.This document includes a Bibliography.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.SIST EN 13739-2:2004
EN 13739-2:2003 (E)41 ScopeThis European Standard specifies methods to test mounted, trailed and self-propelled broadcasters and full widthsolid fertilizer distributors used in agriculture and horticulture.This European Standard does not apply to machines which are:¾ combined grain and fertilizer drills; or¾ equipment for distributing granulated pesticides; or¾ solid fertilizer line-distributors (which are dealt with in prEN 13740-1 and in prEN 13740-2).¾ If the term ‘machine’ is used it shall cover both full width distributors and broadcasters, except in thedefinitions.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revision of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 1235, Solid fertilizers – Test sieving (ISO 8397:1988 modified).EN 1236, Fertilizers – Determination of bulk density loose (ISO 3944:1992 modified).EN 13299, Fertilizers – Determination of flow rate.EN 13739-1:2003, Agricultural machinery – Solid fertilizer broadcasters and full width distributors – Environmentalprotection – Part 1: Requirements.3 Terms and definitionsFor the purposes of this European Standard the terms and definitions given in EN 13739-1:2003 apply.4 Test conditions4.1 Machine for testDuring the tests the machine shall be used according to the instruction handbook.In the test the machine shall be driven with a forward test speed which does not vary by more than ± 0,1 km/h andwhich is within the range of 4 km/h ± 0,4 km/h.The number of runs for each measurement shall be two.The flow adjustment using 4 km/h shall be set to correspond to the flow rate obtained at a forward driving speed of8 km/h.SIST EN 13739-2:2004
EN 13739-2:2003 (E)5If the machine is not designed to be used at a forward speed of 4 km/h, the forward test speed shall be within therange of 8 km/h ± 0,4 km/h or 10 km/h ± 0,5 km/h or 12 km/h ± 0,6 km/h and the number of runs shall be four resp.five resp. six with the flow rate set according to the forward speed. The test speed shall also in this case not varyby more than ± 0,1 km/h from run to run within each test.The forward speed, PTO ratio and disc speed shall be stated in the test report.The distributing mechanism shall be at the height above the fertilizer-collecting containers (the upper edge of thecontainers) equal to that recommended by the manufacturer for work above the ground or the crop.4.2 Test materialsUnless the instruction handbook states otherwise, test materials shall be used from the following groups and asspecified in 6.3 to 6.10:a) a granular fertilizer with bulk density > 0,9 kg/dm3 ;b) a granular fertilizer with bulk density £ 0,9 kg/dm3 ;c) a prilled fertilizer with bulk density > 0,9 kg/dm3 ;d) a prilled fertilizer bulk density £ 0,9 kg/dm3 ;e) a compacted fertilizer.NOTECrystalline fertilizers will be considered during the next revision when they have been used more regularly so thatexperts can agree on their physical properties.The physical properties for the test material to be used shall be within the limits given in Table A.1.The physical properties of the test material used shall be specified in the test report.4.3 Application ratesUnless the instruction handbook states otherwise, the following adjustments calculated for 8 km/h shall be used asselected in 6.3 to 6.10:¾ rate 1:a flow rate corresponding to a minimum application rate for the test material depending on thenutrient content, according to Table 1;¾ rate 2:a flow rate corresponding to a maximum application rate for the test material depending on thenutrient content, according to Table 1;¾ rate 3:a flow rate in between, corresponding to (rate 1 + rate 2)/2.The machine shall be adjusted to give the flow rate of the test material within ± 5 kg/min for flow rates < 100 kg/minand ± 5 % for flow rates ³ 100 kg/min. The flow rates are calculated from application rates and working widths atthe forward driving speed determined in 4.1.SIST EN 13739-2:2004
EN 13739-2:2003 (E)6Table 1 — Minimum and maximum application rates depending on nutrient contentApplication ratekg/haNutrientminimummaximumN20120P2O5 (P)30 (13)150 (65)K2O (K)40 (33)300 (249)MgO (Mg)25 (15)100 (60)NOTEThe application rate (kg/ha) is calculated on the basis of the nitrogen (N)content for the test materials which include nitrogen and on the basis of the phosphor (P)content for test materials which include phosphor but no nitrogen.If there is no (N) or (P), the application rate is calculated on the basis of (K) or (K2O), andif no (K), on (Mg) or (MgO).5 Test equipment5.1 Accuracy in weighing measurementsThe minimum accuracy for the weighing of the samples of test materials shall be:¾ ± 0,1 g for the tests of 6.6; 6.7; 6.8;¾ ± 1,0 g for the test of 6.5.2;¾ ± 500 g for the tests of 6.2; 6.3; 6.5.1; 6.9; 6.10.5.2 Devices for receiving fertilizer for transverse distributionThe collecting containers shall have top external dimensions of 500 mm ´ 500 mm and precautions shall be takento minimise spillage by ricochet out of the containers.NOTEThe wall thickness at the top edge should be equal or smaller than 1,5 mm. An example of a funnel shapedcontainer is shown in Figure B.1. The container can also be of rectangular or square vertical section. Test collecting containerswith external top dimensions of 250 mm ´ 500 mm could be used side by side if their collected amount is added together.Existing collecting containers of 250 mm ´ 1 000 mm could be used since it has been shown that the result corresponds to500 mm ´ 500 mm containers.90 % to 100 % of the expected amount of test materials shall be collected.This requirement is checked by comparing the application rate calculated from the collecting containers with theapplication rate obtained in the flow rate test, when using test material from the same batch in both measurements.5.3 Test siteThe tests shall be carried out on an even, horizontal and hard surface. The air velocity shall be less than 2 m/sduring the tests. The air humidity shall be less than 65 % and the temperature 10 °C to 25 °C.The actual values of air humidity, temperature and air velocity shall be stated in the test report. If tests are doneoutdoors, this shall also be stated in the test report.Precautions shall be taken to eliminate ricochets from the ground into the collecting containers.SIST EN 13739-2:2004
EN 13739-2:2003 (E)7The test site shall be fully described in the report.5.4 Handling of test materials during the testsIt is important that the test materials are not exposed to the air more than necessary. The maximum exposure timebefore the test starts is 4 h.All samples, for later analysis of physical properties, shall be immediately put under airtight storage.6 Test methods6.1 Contact with obstaclesFor machines equipped with a boom the following test is performed:An obstacle is placed along a horizontal test track. The machine is moved forward with the speed of 8 km/h. Theboom shall hit the obstacle at 90 % to 100 % of the half boom width out measured from the middle of the track (seeFigure 2 in EN 13739-1:2003).The boom movement is observed during the test. After the test the boom section is inspected for any damage andthe location of damage is noted in the test report.6.2 Estimation of hopper volume – Checking of the spillageThe volume of the hopper shall be estimated with one fertilizer of type a) with a bulk density D measured accordingto EN 1236. If not stated otherwise in the instruction handbook, when estimating the volume of the hopper themachine shall be placed horizontally.The hopper shall be filled between 10 % to 80 % of the basic-hopper volume. This shall be performed three times:one at the 10 % filling level, one at the 45 % filling level and one at the 80 % filling level, with the surface levelledaccording to the instruction handbook.At each time the mass M of fertilizer is measured. The volume V = M / D of the fertilizer put into the hopper shall benoted as well as the volume indicated by the hopper scale. The deviation in percent between the volume of fertilizerput into the hopper and the indicated volume shall be noted.Check by inspection at 80 % filling level of the basic hopper that no spillage occur from the machine duringtransport when the feeding device is closed or disengaged.6.3 Adjustment of flow rateThe obtained flow rate shall be measured with the spreader completely equipped and adjusted for field spreading.If the machine has a manually controlled system for decrease or increase of the flow rate, then the system shall betested at + 20 % and at – 20 % of flow rate 3. The test shall be performed with test material of type a) as specifiedin 4.2.Test samples shall be taken over a period equivalent to that required to collect at least 50 kg.The deviation of the obtained flow rate from the intended flow rate is calculated as a percentage of the intendedflow rate. This value is noted in the test report.NOTEThe test could be performed during the test of flow rate in 6.10.SIST EN 13739-2:2004
EN 13739-2:2003 (E)86.4 Reduced working width or throwing widthThe possibilities to reduce the working width and adjustment for field edge spreading shall be checked with thehopper filled to at least 10 % of the basic hopper volume with a test material of type a) and:1)the working width is reduced symmetrically from the tested working width to the smallest stated reducedworking width;2)the machine is adjusted according to the manufacturer's instruction for field edge spreading.NOTEThe inspections could be done during the tests of 6.9 or 6.10. Points 1) and 2) can be done during the test of 6.6.6.5 Flow rate regulation system, when available (see example in Figure 1)6.5.1 Deviations of the flow rateFill the basic hopper to at least 25 % of the basic hopper volume.Set the machine with the automatic system and the test material of type a) and to the specified flow rate 3.Find out which parameters can influence the regulation system and regulate the flow by using one parameter at atime according to:¾ change in speed ± 50 % of average recommended speed; or¾ change in application rate ± 50 % of the stated flow above.After each change, set the machine to flow rate 3 and measure the deviation between the obtained flow rate andthe intended flow rate.Both positive and negative deviations are measured by collecting all test material with at least 50 kg for eachsample. For each parameter tested two measurements shall be made.Calculate and note in the test report the deviations in percent of the obtained flow rate from the intended flow rate.6.5.2 Continuous mass flow measurementsSet the machine with the automatic system and the test material of type a) to the specified flow rate 3.Measure and note in the test report the time needed to increase the flow rate from flow rate 3 to 1,5 times flowrate 3.Measure and note in the test report the time needed to decrease the flow rate from flow rate 3 to 0,5 times flowrate 3.The deviation of the obtained flow rate from the intended flow rate according to Table 1 of EN 13739-1:2003 has tobe considered.SIST EN 13739-2:2004
EN 13739-2:2003 (E)9Key1Max. permitted deviation2Preset value3Initiation4x = time (s)5y = flow rate (kg/min)Figure 1 — Example of types of regulation6.6 Evenness of transversal distribution6.6.1 Arrangement of containersContainers (see 5.2) shall be placed in a row side by side with their top edges parallel to the ground surface andshall cover at least the throwing width. The row of containers shall be perpendicular to the direction of travel.Arrange the containers so that the centre of the machine moves between the two collectors which represent thefirst container on right and left side.NOTEThe influence of for example tractor wheels when passing over the containers should be minimised.SIST EN 13739-2:2004
EN 13739-2:2003 (E)106.6.2 ProcedureEither the machine or the collecting containers shall be in motion.Arrange and adjust the machine according to the manufacturer's instructions. Carry out the test with the machineadjusted for a speed according to 4.1 and note the adjustments in the test report.If the driving speed is different from 8 km/h the application rate collected from the containers shall be calculated bymultiplying with x/y, where x is the actual speed and y is the speed which the flow rate is adjusted for. Theapplication rate collected shall also be corrected for the number of runs, specified in 4.1.On completion of each test, the hopper shall still be filled to at least 25 % of the stated basic hopper volume, or theminimum of 500 l during the whole test, whichever is the lower.Carry out with test materials of types a) and c) as specified in 4.2 at the three flow rates, as specified in 4.3. Testsshall also be performed for types b), d) and e) with flow rate 3.Weigh the test material collected in each container and calculate the coefficient of variation (CV) according to 7.1.3.The test shall be carried out at least at one working width specified in the instruction handbook. No more than twotests for optimising the spreading pattern are permitted. Optimising tests shall be carried out in accordance withmethods described in handbooks. Settings and results of the tests carried out shall be mentioned in the report.6.7 Evenness of transverse distribution near the field edgeArrange and adjust the machine according to the manufacturer's instructions for border spreading. Each borderspreading equipment shall be tested with test materials a) to e) with flow rate 3.Perform the tests according to 6.6.Calculate the maximum deviation of the application rate within the edge width from the average application rate,calculated in 6.6 for the test material used. Calculate the coefficient of variation in the transition width (CT). Use theresults from 6.6 to add to the transverse border distribution when calculating CT.NOTEThe border distance and transition width are illustrated in Figure 1 of EN 13739-1:2003.Indicate in the report the value Y as defined in 7.1.4.The values of border distance, working width, CT, Y and Z (from the border to the fertilizer limit as calculated in7.1.4) and the machine setting shall be presented in the test report.6.8 Evenness of transverse distribution when spreading with equipment for top-dressingEquipment and/or adjustments for top-dressing shall be tested for the flow rate 1 and a granular test materialcontaining nitrogen, from one of the groups selected for the tests in 6.6. The test shall be performed when top-dressing at normal spreading and spreading near the field edge.The method of testing is to use the equipment and method according to 6.6 and 6.7 except for the heightadjustment of the machine which shall be the same height between the collecting container's upper edge and thespreading devices as that stated by the manufacturer for the height between the top of the crop and the spreadingdevices. If the distributor cannot be adjusted (e.g. in height) in accordance with the instruction handbook, themethod used shall be mentioned in the report.SIST EN 13739-2:2004
EN 13739-2:2003 (E)116.9 Deviation of the obtained flow rate from the intended flow rateThe test shall be performed with test material of type a) from those selected in 6.6 and at the specified flow rates 1,2 and 3.Set the flow rate as close as possible (if the setting is stepless: below 3 %) to the intended flow rate by using thecalibration method described in the handbook.Then two longer obtained flow rate tests shall be performed with the same type of test material and with a samplesize of at least 50 kg of test material. Calculate the deviations between the average of the two obtained flow ratesand the intended flow rate.6.10 Evenness of obtained flow rate6.10.1 Obtained flow rate on horizontal groundThe test is carried out with test material of type a). The basic hopper shall be filled to at least 25 % of its maximumstated volume.Adjust the feed setting so as to obtain a flow rate as near as possible to the flow rate 3 at a chosen working width.Start up the feed mechanism.The test shall be performed with mass flow measurements with a measuring frequency of at least 1 Hz.Present a graph of the deviation between the intended and obtained flow rate during test and the filled fertilizer.6.10.2 Obtained flow rate on sloping groundPerform as for 6.10.1 but on a surface with inclination angles of 10° upwards, downwards and to either side,respectively.The obtained flow from each feeding device shall be measured separately.Compare the flow rates with the results in 6.10.1.7 Calculation and presentation of test results7.1 Transverse distribution7.1.1 WeighingWeigh the quantities collected in each container separately. Divide each of these values by the number of runs inorder to determine the mean quantity distributed per run, and illustrate the distribution using a histogram (see thegraph in Figure 2).SIST EN 13739-2:2004
EN 13739-2:2003 (E)12Key1Application rate (%)2Cumulative distribution curve with overlapping to and fro3Working widthFigure 2 — Schematic example showing evenness of transversal distribution7.1.2 Working widthThe overlapped distribution shall be determined for the tested working width by using the histogram (see 7.1.1).This shall be established by using the method for to and fro distribution, superposition by translation of thehistogram with its mirror image. The coefficient of variation is calculated according to 7.1.3.Present also the graph with the coefficient of variation as a function of the working width. The application rate andtype of fertilizer shall be noted in the graph-text.If the setting of the distributor is another than recommended in the instruction handbook, this shall be noted in thetest report.SIST EN 13739-2:2004
EN 13739-2:2003 (E)137.1.3 Degree of unevenness of transverse distributionThe coefficient of variation, CV (%) is given by the formula:100´=xsCV(1)where s is the standard deviation, given by the equation:()å=-=nixxns12i - 11(2)wheren is the number of containers on the working width;xi is the amount collected in each container, in grams after overlapping to and fro;xis the average amount of collected fertilizer, in grams, after overlapping to and fro, given by theequation:å=nixn1 = x1i(3)7.1.4 Equipment for spreading near the field edgeFor all machine types, present the results in accordance with 7.1.1.Calculate the maximum positive deviation in the transverse distribution in the edge width and compare it with theaverage application rate in 7.1.2. and 7.1.3 (the same test material and adjusted application rate).Calculate the coefficient for the transition width CT (%) from the formula:100T´=xsCT(4)whereTsis the standard deviation in the transition width, given by the formula:å=TiT12TTnix-x1-n1 = s)((5)SIST EN 13739-2:2004
EN 13739-2:2003 (E)14wherenTis the total number of containers in the transition width;iTxis the calculated amount in each container in the transition width, in gram. Each amount is calculatedby combining an overlapped distribution of field edge spreading and normal spreading to and fro, seealso Figure 1 of EN 13739-1:2003.Calculate the value Y outside the border from the formula:axlxYNi´´´=å=1bi1000(6)whereN
is the number of containers between the border and the first empty container;xbi
is the amount collected in each container outside the border, in grams;x see formula (3) in 7.1.3;l is the number of containers to be placed on 100 m border length (i.e. = 200);a is the number of containers to be placed on 1 ha field area (i.e. = 40 000).In case of the use of containers of 0,50 m ´ 0,50 m, the formula can be simplified as follows:xxxxYNiNiåå==×=´´´=1bi1bi5400001000200(7)Calculate the value Z from the border to the fertilizer limit: Distance (in m) from border to fertilizer limit. (In case ofthe use of containers of 0,50 m ´ 0,50 m: Z = N ´ 0,5)NOTEThe loss (kg) per 100 m border length can be calculated from formula given in C.5.7.1.The presentation of the results shall be given in accordance to Figure 3.SIST EN 13739-2:2004
EN 13739-2:2003 (E)15Key1Fertilizer limit2Border3Distance ZFigure 3 — Schematic example showing the transversal distribution on the border7.1.5 Top-dressingCalculate and present the results in accordance to 7.1.1 to 7.1.3.7.2 Flow rate7.2.1 Obtained flow rate on horizontal groundCalculate from each recording the deviation of the obtained flow rate from the intended flow rate.Note the maximum deviation from the intended flow rate in the test report.7.2.2 Obtained flow rate on sloping groundCalculate the results in accordance to 7.2.1 for each slope.Calculate also the difference between at least two measured flows for each slope.Calculate the deviation between the average obtained flow from each slope and the average obtained flow onh
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