000			01500nab a22003377a 4500
001			G49425
003			MX-TxCIM
008			121211b |||p||p||||||| |z||| |
022	0		_a0002-1857
040			_aMX-TxCIM
041	0		_aEn
043			_aIT
072		0	_aF10
072		0	_aF50
082	0	4	_a81-634848
100	1		_aMangas Martin, V.J.
245	0	0	_aEcophysiological factors determining wheat grain production
260			_c1980
340			_aPrinted
500			_a4 tables; 20 ref. Summaries (De, En, Es, Fr, It)
520			_aThe effect of soil and weather on winter wheat (Triticum aestivum L.) grain yield in semi-arid regions has been studied. It is an attempt to investigate the determinant parameters of yield by a principal factor analysis. Ear and grain formation possibly depressed by the maximum temperature of the air: above 22 deg. and 30 deg. C, respectively, in the eight plots. Internal mechanisms of plants tending to the compensation between yield components are found, as well as limitation of photosynthetic capacity by drought during the period around anthesis. The results show the importance of environmental conditions shortly before anthesis and during grain
546			_aEnglish
591			_aCOMOD
595			_aAC
650	1	0	_aMeteorology and climatology
650	1	0	_aPlant structure
650	1	0	_aWheat triticum spp
700	1		_aSanchez de la Puente, L., _ecoaut.
773	0		_tAgrochimica _n81-634848 _gv. 24, no. 2-3, p. 160-168
942			_cJA
999			_c14164 _d14164