000			00342nam a2200133Ia 4500
008			230108s9999 xx 000 0 und d
100			_aHillel D.
245		0	_aOptimizing the Soil Physical Environment Toward Greater Crop Yield
260			_bAcademic Press
260			_c1972
365			_b390.50
650			_aSoil science
942			_cBK
999			_c237701 _d237701