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999 _c6570
_d6570
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020 _a025896958X
040 _cPK-IsLIS
082 _a630
_bH4971
_22nd ed.
100 _aHewitt, E.C.
245 0 _aAgriculture science :
_bfor schools and colleges
_c/ E. C. Hewitt, D. J. Brazier
250 _a2nd ed.
260 _bCrosby Lockwood Staples,
_aLondon :
_c1974
300 _aviii, 315 p.
650 _aTechnology-Agriculture
942 _cBK
505 0 _a1. Basic principle 2. The plant 3. The animal 4. The environment 5. Beneficial and harmful organism 6. Chemicals in crop husbandry