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                                                                    EXHIBIT 10.5

                                    AGREEMENT

     NOW on this the 24th day of March, 2003, comes Rite Way Oil & Gas Co.,
Inc., a Nebraska corporation, hereinafter referred to as "Rite Way" and Husker
Ag, LLC, a Nebraska limited liability company, hereinafter referred to as
"Husker".

For the consideration paid and to be paid for the transfer of Nebraska Ethanol
Production Tax Credits, Rite Way and Husker hereby agree as follows:

1.   Husker may transfer up to Five hundred thousand dollars ($500,000.00) per
     month in ethanol production credits to Rite Way. This transfer shall take
     place by Husker's filing Nebraska Department of Revenue Form 92 (or its
     amendment or replacement) and declaring therein the amount of the credit
     which is to be transferred to Rite Way. The Nebraska Department of Revenue
     shall notify Rite Way of the amount of credit which has been transferred to
     Rite Way.

2.   When Rite Way receives notification from the Nebraska Department of Revenue
     of the amount of credit granted, Rite Way shall then complete Nebraska
     Motor Vehicle Fuel Tax Return, From 73 (or its amendment or replacement),
     and apply the amount of the transferred credit. Rite Way will then prepare
     to pay Husker the amount of the credit less [* * *]. (The Credit Amount)

3.   Rite Way shall pay the credit amount determined in paragraph two (2), to
     Husker on or before the 25th day of each month. If the 25th day of the
     month falls on a state or nationally recognized holiday or weekend, payment
     shall be made by the next business day. Payment may be in the form of a
     valid company check, money order, cashier's check, or electronic funds
     transfer to the designated Husker account, as chosen by Husker. Continuing
     late payment (defined as more than three times in a calendar year) or any
     failure to pay for a period of ten (10) days beyond the due date, shall
     give Husker an immediate right of cancellation.

4.   In the event that any credit against motor vehicle fuel tax which is
     transferred to Rite Way under the terms of this Agreement is rescinded by
     the State of Nebraska or if for any reason Rite Way is required to repay
     any of the motor vehicle fuel tax credits, then Husker shall immediately
     upon demand, reimburse Rite Way for the amount lost or repaid by Rite Way.

5.   Rite Way and Husker may increase the monthly amount above Five hundred
     thousand dollars ($500,000.00) by mutual agreement as evidenced by a
     written addendum to this Agreement.

6.   This agreement shall continue for the entire term of the 536 Credits
     received by Husker, which is expected to be approximately eight (8) years,
     provided that

[* * *] Material has been omitted pursuant to a request for confidential
        treatment and such material has been filed separately with the
        Securities and Exchange Commission

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     either party may cancel the same by giving written notice one year or more
     in advance of the stated cancellation date.

7.   All notices shall be served upon the parties by first class mail, certified
     and return receipt requested, at the following addresses:

     Rite Way Oil & Gas Co., Inc.                Husker Ag, LLC
     P.O. Box 27049                              P.O. Box 10
     8400 "I" St.                                Plainview, NE 68769
     Omaha, NE 68127
     Attention: Brad Johnson                     Attention: Gary Kuester
     Phone (402) 331-6449                        402-582-4446

Rite Way Oil & Gas Co., Inc.                     Husker Ag, LLC

By:  /s/ B. Edward                               By:      /s/ Gary Kuester
   -------------------------------                  ----------------------------

Title:       President                          Title:         Chairman
      ----------------------------                    --------------------------

                                        2<Page>

                                                                    EXHIBIT 10.6

                 RISK MANAGEMENT AND ETHANOL MARKETING CONTRACT

THIS AGREEMENT is entered into by and among FCStone, LLC ("FCStone"), an Iowa
limited liability company with its main office at 2829 Westown parkway, West Des
Moines, Iowa 50266, and Eco-Energy, Inc. ("Eco") a Tennessee Corporation with
its main office located at 730 Cool Springs Blvd. Suite 130, Franklin, Tennessee
37067, and Husker Ag, LLC (HA) with its main office located at P.O. Box 10,
Plainview, NE 68769.

RECITALS:

A.   HA is a Limited Liability Company, which is developing an ethanol plant
     facility located at, (the "Plant") and which desires to establish an input
     origination and marketing risk management plan and an output-marketing
     contract.

B.   FCStone, which is experienced in commodity transactions and related risk
     management, is willing to provide such assistance on the terms hereby
     stated.

C.   Eco is a reseller in ethanol and is experienced in the marketing and
     transportation of such product, and is willing to agree to purchase the
     ethanol output of the Plant.

NOW, THEREFORE, IT IS AGREED AS FOLLOWS BETWEEN THE PARTIES:

1.   FCSTONE AND ECO SERVICES. FCStone shall, during the term hereof, provide
     services to HA in the implementation of a full service price risk
     management program for HA (the "FCStone program"). HA will have a full time
     risk manager of FCStone from an FCStone office to help in day-to-day grain
     marketing decisions. The FCStone services to be provided are set forth in
     Exhibit A attached hereto. Eco shall, during the term hereof, purchase the
     entire output of ethanol specified herein and to provide certain
     transportation services to HA (the "Eco Program"). The Eco services to be
     provided are set forth in Sections 2, 3 and 4 and the exhibits attached
     hereto which are referred to therein.

2.   ECO ETHANOL OUTPUT PURCHASES. HA agrees to sell to Eco, and Eco agrees to
     purchase from HA the entire output of ethanol of the Plant during the term,
     in good faith and at fair market rates. The terms of such transactions
     shall be fixed by agreement of HA and Eco established in good faith from
     time to time consistent with the provisions of Exhibit B attached hereto.

3.   ECO DENATURANT PROCUREMENT. HA at HA's option can purchase their entire
     denaturant demand from Eco during the term or purchase the denaturant on
     their own. The terms of such transactions shall be fixed by agreement of HA
     and Eco established in good faith from time to time.

4.   ECO TRANSPORTATION SERVICES. Eco agrees to provide the transportation
     services set forth in Exhibit C. HA agrees to pay freight and assume
     railrcar leases as provided in Exhibit C.

5.   FEES.

     (a)  HA shall pay a fee for services of Eco and FCStone and materials
          provided hereunder of [* * *] per net gallon of ethanol produced
          during the Term. Such fees shall be payable monthly on an estimated
          basis on the first business day of each month during the term hereof,
          in advance to FCStone. FCStone shall remit a share of such fee to Eco
          as Eco and FCStone may agree. The initial estimated monthly payment
          shall be [* * *] per month. The actual fees payable based upon actual
          production and the above quoted rate shall be computed every three (3)
          months and additional payment to FCStone or credits to HA's account
          shall be made, and the monthly fee adjusted, so as to accurately
          reflect the actual fees payable.

[* * *] Material has been omitted pursuant to a request for confidential
        treatment and such material has been filed separately with the
        Securities and Exchange Commission

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     (b)  In addition to such fees, HA shall also pay to FCStone any transaction
          commissions, fees, services charges or mark-ups arising from options,
          futures or other risk management or cash commodity transactions
          executed or brokered through FCStone, its affiliates, or others in
          accordance with their applicable schedules of rates, except that
          FCStone guarantees that the rate for exchange-traded futures and
          options contracts shall be not be more than [* * *] per round turn,
          plus all applicable exchange fees, during the initial term hereof. Any
          OTC (over -the-counter) transactions will be [* * *] per round turn,
          plus any applicable fees, during the initial term hereof.

6.   HA REPRESENTATIVE. HA shall designate one or more persons who shall be
     authorized and directed to receive services hereunder and to make all
     hedging and merchandising and purchasing and sales decisions for HA. All
     directions, transactions and authorizations given by such representative to
     FCStone or to Eco shall be binding upon HA. FCStone and Eco shall each be
     entitled to rely on the authorization of such persons until it receives
     written notification from HA that such authorization has been revoked.

7.   TRANSACTIONS WITH FCSTONE AND FCSTONE AFFILIATES. HA understands, approves,
     authorizes, and agrees that FCStone as an advisor may recommend that HA
     enter into transactions where FCStone will act as a broker or futures
     commission merchant or where HA may enter into transactions with one or
     more companies which are under common ownership or control with FCStone,
     including, but not limited to, FCStone Trading, L.L.C. with respect to
     physical energy products and over the counter swaps and options and FGDI,
     L.L.C. with respect to cash grain. FCStone may also participate on HA's
     behalf in negotiations with one or more elevators, which are members of
     FCStone's parent company. All futures, swap or cash commodity transactions
     involving HA, FCStone and its affiliates shall be subject to, and shall be
     governed by, the applicable customer agreements, master agreements,
     confirmations, and other documentation thereof.

8.   FCSTONE LIMITATIONS.

     (a)  To the extent and if any brokerage services are provided by FCStone it
          will be to find suppliers or purchasers for HA. FCStone will not
          purchase or sell grain, nor will it be directly involved in the
          purchase of the grain involving HA. FCStone may give merchandising,
          purchasing and hedging advice to HA, but all decisions on purchasing,
          merchandising and hedging strategy will be made by HA. All hedging
          positions will be the responsibility of HA, in HA's account with
          FCStone or other relevant party. All positions shall be for the
          purpose of hedging against price risks associated with the HA's
          operations.

     (b)  FCStone assumes no responsibility for the completion or performance of
          any contracts between HA and HA's customers and suppliers, and HA
          agrees that it shall not bring any action or make any claim against
          FCStone based on any act, omission or claim of any of HA's customers
          or suppliers.

     (c)  To the extent FCStone provides services relating to accounting
          systems, sole responsibility for the accuracy and completeness of HA's
          books and financial statements shall remain with HA. FCStone shall not
          be deemed to attest in any way to the accuracy of such books and
          financial statements.

     (d)  FCStone assumes no responsibility for tax advice, tax planning, or tax
          returns or tax reporting.

9.   ECO LIMITATIONS.

     (a)  Eco assumes no responsibility for the completion or performance of any
          contracts between HA and HA's customers and suppliers, and HA agrees
          that it shall not bring any action or make any claim against Eco based
          on any act, omission or claim of any of HA's customers or suppliers.

[* * *] Material has been omitted pursuant to a request for confidential
        treatment and such material has been filed separately with the
        Securities and Exchange Commission

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     (b)  HA is responsible to cover all non-deliveries of any product that is
          contracted between ECO and HA in a timely manner in order to stay
          within the time parameters of the contract. ECO will assist in
          procuring product from other suppliers to cover these non-deliveries.

     (c)  If any party terminates this agreement for any reason, all parties
          will be responsible to complete any existing contracts.

10.  SEPARABILITY AND NON-LIABILITY. The services, contracts and relationship
     between HA and FCStone and between HA and Eco are independent and
     separable. FCStone shall have no liability or responsibility to HA for the
     performance of Eco hereunder. Eco shall have no responsibility or liability
     for the performance of FCStone hereunder. Termination of this Agreement as
     between Eco and HA shall not impair the continuing relationship between
     FCStone and HA, and termination as between FCStone and Eco shall not impair
     the continuing relationship between Eco and HA. Termination of this
     Agreement as between FCStone and HA shall not impair the continuing
     relationship between Eco and HA.

11.  CONFIDENTIALITY AGREEMENT. The parties have previously executed a
     Confidentiality and Nondisclosure Agreement. Such agreement shall remain in
     full force and effect and shall apply and govern all disclosure and use of
     confidential information hereunder.

12.  PUBLIC DISCLOSURE. Any public announcements concerning the transaction
     contemplated by this agreement shall be approved in advance by FCStone,
     ECO, and HA, except for disclosures required by law, in which case the
     disclosing party shall provide a coy f the disclosure to the other party
     prior to its public release. As HA is subject to SEC filing requirements,
     and SEC required filings will not be subject to advance disclosure, except
     as allowed by the SEC.

13.  TERMS AND TERMINATION.

     (a)  The initial term of this Agreement shall commence on the date hereof
          and shall continue for an initial term of one year from the date that
          the HA ethanol plant begins production. This contract will
          automatically renew for an additional term of one (1) year unless HA
          gives notice of non-renewal in writing to FCStone and to Eco at least
          four (4) months prior to the end of the initial term. At the renewal
          date FCStone, Eco and HA will discuss the fee rate and may at the
          agreement of all parties change the fee structure.

     (b)  This agreement may be terminated by HA as to either FCStone or Eco in
          the event of material breach of any of the material terms hereof by
          such other party, by written notice specifying the breach, which
          notice shall be effective fifteen (15) days after it is given unless
          the receiving party cures the breach within such time. This agreement
          may be terminated by either FCStone or Eco as to HA in the event of
          material breach of any of the material terms hereof by HA, by written
          notice specifying the breach, which notice shall be effective fifteen
          (15) days after it is given unless the receiving party cures the
          breach within such time. This agreement may be terminated immediately
          without notice at the election of any party in the event of
          bankruptcy, or any other receivership or insolvency proceeding is
          filed by or against another party.

     (c)  This Agreement may also be terminated between any tow parties by the
          mutual consent of any two of the parties on such terms as the parties
          may agree.

     (d)  In addition to any other method of terminating this Agreement, either
          FCStone or Eco may unilaterally terminate this Agreement at any time
          if such termination shall be required by any regulatory authority, and
          such termination shall be effective on the 30th day following the
          giving of notice of intent to terminate.

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14.  LICENSES, BONDS, AND INSURANCE. Each party represents that it now has and
     will maintain in full force and effect during the term of this Agreement,
     at its sole cost, all necessary sate and federal licenses, bonds and
     insurance in accordance with applicable state or federal laws and
     regulations.

15.  LIMITATION OF LIABILITY. EACH PARTY UNDERSTANDS THAT NO OTHER PARTY MAKES
     ANY GUARANTEE, EXPRESS OR IMPLIED, TO ANY OTHER OF PROFIT, OR OF ANY
     PARTICULAR ECONOMIC RESULTS FROM TRANSACTIONS HEREUNDER. IN NO EVENT SHALL
     ANY PARTY BE LIABLE FOR SPECIAL, COLLATERAL, INCIDENTAL, OR CONSEQUENTIAL
     DAMAGES FOR ANY ACT OR OMISSION COMING WITHIN THE SCOPE OF THIS AGREEMENT,
     OR FOR BREACH OF ANY OF THE PROVISIONS OF THIS AGREEMENT, EVEN IF IT HAS
     BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SUCH EXCLUDED DAMAGES
     INCLUDE, BUT ARE NOT LIMITED TO, LOSS OF GOOD WILL, LOSS OF PROFITS, LOSS
     OF USE AND INTERRUPTION OF BUSINESS.

16.  DISCLAIMER. HA understands and agrees that FCStone and Eco make no warranty
     respecting legal or regulatory requirements and risks. HA shall obtain such
     legal and regulatory advice from third parties as it may deem necessary
     respecting the applicability of legal and regulatory requirements
     applicable to HA's business.

17.  INDEMNITY. HA agrees to indemnify FCStone, Eco and their brokers, officers,
     agents and employees and hold them harmless form and against any claims,
     demands, liability or expense, including attorneys fees and other
     litigation expenses, arising out of claims by HA's customers or suppliers.

18.  NATURE OF RELATIONSHIP. FCStone and Eco are independent contractors
     providing services to HA. No employment relationship, partnership or joint
     venture is intended, nor shall any such relationship be deemed created
     hereby. Each party shall be solely and exclusively responsible for its own
     expenses and costs of performance.

19.  NOTICES. Any notices permitted or required hereunder shall be in writing,
     signed by an officer duly authorized of the party giving such notice, and
     shall either be hand delivered or mailed. If mailed, notice shall be sent
     by certified, first class, return receipt requested, mail to the address
     shown above, or any other address subsequently specified by notice from one
     party to the other.

20.  GENERAL.

     (a)  This agreement is the entire understanding of the parties concerning
          the subject matter hereof, and it may be modified only in writing
          signed by the parties. All commodities futures, options, and swap
          transactions shall be subject to the customer or master agreements
          between HA and FCStone, its affiliates, or others. The parties may
          enter into other agreements in writing, including but not limited to
          service agreements, customer agreements and master agreements with
          respect to commodity futures options and swaps.

     (b)  If any provision or provisions of this agreement shall be held to be
          invalid, illegal or unenforceable, the validity, legality and
          enforceability of the remaining provisions shall not in any way be
          affected or impaired thereby.

     (c)  No party shall be liable for any failure to perform any or all of the
          provisions of this agreement if and to the extent that performance has
          been delayed or prevented by reason of any cause beyond the reasonable
          control of such party. The expression "cause beyond the reasonable
          control" shall be deemed to include, but not be limited to: acts,
          regulations, laws, or restraints imposed by any governmental body;
          wars, hostilities, sabotage, riots, or commotions; acts of God; or
          fires, frost, storms, or lightning.

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     (d)  This agreement is not intended to, and does not, create or give rise
          to any fiduciary duty on the part of any party to any other.

     (e)  No action, regardless of its nature or form, arising from or in
          relation to this Agreement may be brought by either party more than
          two (2) years after the cause of action has arisen, or, in the case of
          an action for nonpayment, more than two (2) years from the date the
          last payment was due. Venue for any action arising from or in relation
          to this agreement shall be in Pierce County, Nebraska.

     (f)  This agreement is governed by and shall be construed under the laws of
          the State of Iowa.

     (g)  This agreement shall be binding upon and inure to the benefit of the
          parties and the successors and assigns of the entire business and
          goodwill of FCStone, Eco or HA, but shall not be otherwise assignable
          without the express consent of the other parties.

DATED AND EXECUTED AS OF THIS 27 DAY OF NOV, 2002.

HUSKER AG, LLC

BY: /s/ O. Kelly Hodson
    -------------------

FCSTONE, L.L.C.

BY: /s/ illegible
    -------------------

ECO-ENERGY

BY: /s/ illegible, President
    ------------------------

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                                    EXHIBIT A

                                FCSTONE SERVICES

FCStone will provide the following services based on sound risk management
principles, using FCStone's Basis Trading experience together with the futures
and options markets to reduce HA's exposure to commodity price changes.

      I.  GENERAL SCOPE. FCStone will provide advice, assistance and risk
               management with respect to HA's grain origination, energy and
               transportation, procurement and output sales.

     II.  CONSULTING SERVICES AND PROGRAM: FCStone services to HA shall fall
          into two (2) categories.

          1)   FCStone shall provide HA with price risk management evaluation,
               review and advice in relation to use of Corn and/or any other
               grain products as they relate to the day-to-day operations of the
               plant.

          2)   FCStone shall provide HA with price risk management evaluation,
               review and advice in relation to use of Natural Gas and/or any
               other energy products as they relate to the day-to-day operation
               of the plant.

          Such services to be summarized monthly/annually in a detailed report
          prepared by FCStone for the HA staff/board, and accordingly to their
          satisfaction in terms of content and accountability.

    III.  INTERNAL RISK MANAGEMENT PROCEDURES:

                                   A.   Risk management guidelines and controls.
                                        Risk management recommendations
                                        regarding position limits, strategies,
                                        credit exposure and volumes will be
                                        presented for management and board
                                        approval.

                                   B.   Assist in Establishing Corporate Risk
                                        Policy - Assess Risk Profile - Define
                                        Hedge Objective.

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                                    EXHIBIT B

                             ECO SERVICES - ETHANOL

Eco shall purchase the entire ethanol output of HA's Plant on the following
terms:

               1.   HA can terminate contract if Eco does not pay within net 5
                    business days of Invoice, Bill of Lading (BOL), Return Bill
                    of Lading (RBOL) and Certificate of Analysis (COA).

               2.   Eco will pay net 3 business days upon receipt of Invoice,
                    BOLLESS THAN RBOL, and COA.

               3.   HA is responsible for any and all local state and federal
                    tax liabilities.

               4.   Eco will provide scheduling and marketing for ethanol
                    produced.

               5.   Eco will be responsible for receivables risk on ethanol.

               6.   Eco reserves the right to refuse business to anyone due to
                    credit or market risk.

               7.   HA shall meet or exceed all specifications for E-grade
                    denatured fuel ethanol as well as any changes in fuel
                    ethanol industry standards that might occur after the
                    execution of this agreement.

               8.   HA will keep Eco informed on production forecasts, as well
                    as daily plant inventory balances.

               9.   On rail car shipments title of ethanol will transfer as the
                    product passes over the destination delivery flange unless
                    otherwise specified. In these cases Eco is purchasing the
                    ethanol on a CIF delivered basis. On truck shipments title
                    of the ethanol will pass at the loading flange between the
                    plant and the truck unless otherwise specified. In these
                    cases Eco is purchasing the ethanol on a FOB HA plant basis.

               10.  HA will provide a minimum of 10 days storage on the HA site.

               11.  HA must have meters that measure both gross and net 60
                    degrees Fahrenheit temperature corrected gallons.

               12.  Eco shall deduct all unavoidable costs such as government
                    tariffs or assessment fees, sales taxes, import/export
                    handling fees, assessments, inspection fees, or any other
                    that has been approved by the appropriate member of the
                    board of directors.

               13.  Eco will procure all Natural Gasoline (denaturant) for HA if
                    HA so wishes otherwise HA could purchase the denaturant for
                    the plant themselves.

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                                    EXHIBIT C

                          ECO SERVICES - TRANSPORTATION

               1.   Eco will lease all railcars for HA. All leases will be in
                    the name of Eco.

               2.   Eco will estimate the number of railcars needed for HA. If
                    HA chooses to end the contract, they will be responsible to
                    take over all railcar leases.

               3.   Eco will negotiate rail rates on behalf of HA.

               4.   All rail contracts will be in the name of HA.

               5.   HA will invoice Eco for rail freight along with a copy of
                    the actual railroad invoice. (This amount will be paid on a
                    net 3 business days upon receipt of invoice.)

               6.   Eco will purchase all truck gallons on an FOB plant basis.

               7.   Eco will supply all trucks.

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