|
EXPLANATIQN OF SOIL ANALYSIS REPORT
<br /> - - - _
<br /> %ORGANIC MATTER AND ESTIMATED NITROGEN RELEASE(ENR): Calcium Carbonate EquivMlem(cce): Some examples.
<br /> The%Organic Matter content Is determined chemically,on the drliK screened soil Pure ground calcitic limestone(calcium carbonate)=100
<br /> sample.
<br /> m
<br /> However,the total organiccoem may be somewhat higherthan reported because Pure ground dolomitic limestone(calcium magnesium carbonate)-109
<br /> larger pieces of plant and animal residues are screened out prior to analysis. Only a part of Hydrated lime(calcium hydroxide)=1$5
<br /> the total nitrogen in the organic mattor of a soil will become available for plant use during the Burned lime(calcium oxide)=179
<br /> growing season. Many factors such as: soil moisture,soil temperature,the soil's physical
<br /> condition,and the amount and type of crop residues Present all haiie an effect on bacterial Fineness Factor(1111): Calculated as follows.
<br /> action.Therefore,the ENRvalueisonly 4guldetothenitrogen supplyavailableforthborowingg
<br /> crop.For additional information on nitrogen release and recommendation guides see our book Add up the followingg values...
<br /> "Soil and Plant Analysis'. Percent passing#4D sieve x 1.0
<br /> Percent passing#20 sieve minus percent passing#40 sieve x 0.6
<br /> Percent passing#10 sieve minus percent passing#20 sieve x 0.3
<br /> Material that does not pass through a#10 sieve is considered to be relatively non-affective.
<br /> CONVERSIONS:To convert tolbs/A,the typo ofsoil and tillage depth should beconsidered,
<br /> Most mineral soils weigh approximately 2 million pounds(dry,weight)for en acre qt soil Moisture Factor(mf):_100-percent moisture in lime
<br /> 61/2-7 inches deep. n acre of soil 10 inches deep weighs 6pprdximaiely3 million pounds. 190
<br /> In the past,most laboratories that reported results In lbs.per acre were consider(gg 2 million
<br /> lbs of soil per acre(results In ppm x 2=Ibs per acre). However,with deeper tillage Practices., time score=cce x 1f x mf
<br /> used today many growers are dealing with nearly 3 million lbs of soil per acre. Common agricultural lime(70-score)may exit as 90 cce x 0.85 It x 0.90 mf
<br /> Conversion Table: "rho following table is a general guideline for use of common agricultural lime with a Ilmescore
<br /> 2 Million lbs 3 Million lbs of 70.-Forother liming materials,divide 70 by the known lime score then multiply by the rates
<br /> Results of soil per acre Results of soil per acre n the fable.
<br /> in 6 1/2-7 in.deep._. In ppm 9 -�t0 in.deep - Tons/acre agricultural lime(70-score)per 6-Inch depth
<br /> P z'? lbs per acre of P P x 3 . lbs per acre of P Adapted from•'Methods of Soil Analysis"Part 2,ASA Publication,
<br /> x 4.6 Fos per acre of P2Os x 6.9 . lbs per acre of PTOs using lithe SMP single-buffer method.
<br /> K x 2 lbs per acre of K K x 3 - lbs per acre of K Buffer Index Mineral Soil Organic Soir
<br /> x 2.4 - lbs per acre of Kr0 x 3.6 . lbs per acre of K20 SMP PH To PH 6.0 To PH 6.5 To pH 5.5
<br /> Mg 2 - lbs per acre of Mg Mg x 3 . lbs per acre of Mg 7.0 none_ none none
<br /> Ca x 2 lbs per acre of Ca Ca x 3 )be per acre of Ca 6.9 none 0.5 none
<br /> S x 2 be per acre of S S x 3 bs per acre of S 6.8 0.5 = 1.0 none
<br /> S x 6 Ibe per acre of SO4 SX 9 Ibs pef acre d SO4 6.7 1.0 1,5 none
<br /> B,Zn,Mn, 8,Zn,Mn, 6.6 1.5 2.0 1.0
<br /> Fe,Cu;-Mo Fe,Cu,Mo
<br /> 6.5 2.0 3.0 1.5
<br /> x 2 - lbs per acre of B. x 3 be per acre of 8, 6.4 2.5 3.5 2.0
<br /> Zn,Mn,Fe,Cu,Mo Zn,Mn,Fe,Cu,Mo 6.3 3.0 4.0 2.5
<br /> 6.2 3.5 4.5 3.0
<br /> 6.1 4.0 5.0 3.5
<br /> PHOSPHORUS: 6.0 4.5 6.0 4.0
<br /> Two different tests are made and reported for availability of phosphorus in the soil 5.9 5.0 6.5 4.5
<br /> sample.The P,and NaHCO3-P phosphorus tests are routinely run on all A 8 L Western 5.8 6.0 7.0 4.5
<br /> Laboratories reports.' 5.7 6.5 8.0 5.0
<br /> Weak Bray(P,j-This method determines the amount read) avdileble 5.5 7.0 9.0 5.5
<br /> 11 y 5.5 7.5 9.5 6.0
<br /> phosphorus in"the soil. A level of at least 20 ppm of P is desired for average Example: II the SMP butter index reads 5.9 then one wu,ld require 5.0 tons/ac to raise SOIL
<br /> crop most production o sand a level of 30 ppm at P or more Is desired br top yields of
<br /> mpH of a mineral soil to 6.0 or 5,5 tons:ac to raise it to 6.5.4.5 tons/ac would be required to raise
<br /> P an organic soil to 5.5. Limit applications to loss than 4-5 tonsrac at atime.
<br /> Strong Bray(Pr)-This method determines the amount of readily available If the SOIL pH is 6.6 and above,no butter index will be determined since lime would not be
<br /> le asp crus plus n part feof the alive reserve phosphorus in the soil. A; vel of ir,eded for most crops.Cops raised do organic sods usually do not benefit from liming unless
<br /> east most
<br /> P and preferably 60 ppm of P or more is desired for gocvl yields the sod H is less than 5 3.:
<br /> of most sops. p
<br /> Sodium Bicarbonate(HCO.-P)-This method determines the arnountufreadily.. LIMING: tr
<br /> available phosphorus In calcareous soils,(having free lime present.)A level of al-
<br /> least 1 Oppm P and ppreferabley 15 Ppm of P or more Is desired for good yields of
<br /> most crops.For additional information on phosphorus availability and recom men- Apply lime only a"r the sdtf has been tested. Too much lime can be as harmful as
<br /> dation guides see our book'Soil and Plant Analysis.' oo vie
<br /> r
<br /> CATION•EXCHANGE CAPACITY(CEC): >
<br /> Lime must be thoroughly mixed with the soil for maximum effectiveness.
<br /> The'catlon exchange capacity(C.E.C.)Is a measure of the capedy of a soil t.o hold _
<br /> exchangeable cations. These Include Hydrogen(H*),Calcium(Qr,),,Magnesium(Mg-j, It both magnesium and calcium are needed,appy dolomitic lime to help supply
<br /> Potassium(K•),and Sodium(Na,). magnesium.
<br /> Q.E.C.is measured in terms of milliequNeient6(meq.)per 100 grams of soil.It depends
<br /> largely on the amount and type of day present and the organic matter content. The larger this EXCESS LIME:
<br /> value,the more cations the soil is able to hold against leaching. -
<br /> PERCENT CATION SATURATION: A visual rating of free lime present. Soils having high amounts of free lime available
<br /> will have associated problems;n the availability of major and minor elements and difference
<br /> The balance for the soil colloid recommended by most soil scientists Is 65to 75 percent in choice or amount of soil amendments.
<br /> calcium,10 to 15 percent magnesium,and from 2 to 5 percent potassium.
<br /> ,SOLUBLE SALTS:
<br /> The perQant cation saturation Is calculated from the C.E.C.anopercent savation of Ca;
<br /> Mg,K.H{and Na Is reported to assist ou in determnnin the balance of cationsdn your'soil.For
<br /> addilionaf information see our book YSoi1&Plant Ana sis'. For information refer to our book,'Soil and Plant Analysis".
<br /> pH: `'> SULFUR: 4
<br /> SoiIpI::The soil pH is measured oft a saturated paste.The soil pH measures the active, gllcro need sulfur.The higher ens uptake acro the reaterthenaed
<br /> soil acidityy or alkalinity. Mineral soils should have a pH of 6.0 to 7.0 for most crops,while a pH 9 9 p y p e g
<br /> range of 5.5 to 6.0 is adequate for organic soils. for sulfur. A level of 15-20 ppm of available sulfur should be maintained for most crops. For
<br /> additional information on availability of sulfur and making sulfur recommendations see our
<br /> Buffer Index: The buffer pH is determined with the Slwemeker,'Mciean,and Pratt book'Soil and Plant Analysis",'
<br /> (SMP)butler solution. The lime requirement Is determined by the depression of the buffer pH t
<br /> by acidity in the soil sample. The amount of limestone needed to neutralize the acidity present -
<br /> has already been determined and the following table is a general guide,but variations from MICRONUTRIENTS:
<br /> other Published guides may occur due to differences in limestone fineness,neutalizing value,
<br /> and plow depth. The available levels of micronutrients are rated from very low to vary high.However
<br /> LIME REQUIREMENT:
<br /> applying the recommended amount of a certain micronulriem with a low rating will not
<br /> Lime requirement depends upon inequality(limescore)oflhelimingmaterialused-This necessarily ensure a crop response because of the many factors which may Influence
<br /> is a function ot: micronutrient rsponse. Some of the factors which Jntluence response are: rapidly changing
<br /> total neutralizing value or calcium carbonate equivalent(ccs),degree of fineness or particle soil pH,excessive leaching;crop variety,and plant population. For additional Information on
<br /> size(il);and the moisture factor(mf). why plants need micronutrients,their availability,interactions with other nutrients, and a
<br /> recommendation guide see our book'Soil&,Plant Analysis".
<br /> "Our reports and letters are for the exclusive and confidential use of our clients,and may not be reproduced in whole or in
<br /> part,nor may any reference be made to the work,the results or the company in any advertising,news release,or other public
<br /> announcements without obtaining our prior written authorization." Copyright 1977 Revised 6/96
<br /> I R
<br />
|