000			01546nab a22003617a 4500
001			G50259
003			MX-TxCIM
008			121211b |||p||p||||||| |z||| |
022	0		_a0002-1857
040			_aMX-TxCIM
041	0		_aEn
043			_aIT
072		0	_aF21 F22
072		0	_aF25
082	0	4	_a85-021370
100	1		_aFortun, C.
245	0	0	_aEvolution of organic matter and nitrogen in soil treated with barley straw and different levels of nitrogen fertilizer
260			_c1983
340			_aPrinted
500			_a3 tables; 2 graphs; 10 ref.; Summaries (De, En, Es, Fr, It)
520			_aA field experiment was made during a period of 6 years in the central area of Spain. Nitrogen was applied to the soil at 3 different levels, and barley straw was added to 50 per cent of the experimental plots. An increase in organic matter and nitrogen contents was verified in the soil, and it was observed that under the experimental conditions plant residues were transformed into organic materials, but mineralization of the latter did not occur. An immobilization of the N of the soil as well as the N added as fertilizer was observed
546			_aEnglish
591			_aCOMOD
595			_aAC
650	1	7	_aFertilizers _gAGROVOC _2 _91111
650	1	0	_aOrganic fertilizers general
650	1	0	_aSoil biology
650	1	0	_aSoil chemistry and physics
650	1	0	_91952 _aSoil fertility _gAGROVOC
650	1	0	_91190 _aNitrogen fertilizers _gAGROVOC
773	0		_tAgrochimica _n85-021370 _gv. 27, no. 2-3, p. 132-139
942			_cJA
999			_c14972 _d14972