000			03295nam a22004937a 4500
001			G74532
003			MX-TxCIM
005			20250816020845.0
008			121211s ||||f| 0 p|p||0|| |
020			_a92-9146-065-6
040			_aMX-TxCIM
072		0	_aF07
072		0	_aH60
082	0	4	_a633.15 _bEAS No. 6
100	1		_aMabasa, S. _uMaize Production Technology for the Future: Challenges and Opportunities. Proceedings of the Eastern and Southern Africa Regional Maize Conference, 6; Addis Ababa (Ethiopia); 21-25 Sep 1998
110	2		_aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico)
245	0	0	_aWeed management under different tillage systems in smallholder farming areas of Zimbabwe
260			_aAddis Ababa (Ethiopia) _bCIMMYT|EARO : _c1999
300			_ap. 310-313
340			_aPrinted
520			_aTwo tillage practices and seven weed management systems were evaluated for maize in farmer's fields at sites in Chihota, Nharira and Tjolotjo communal areas in the 1995/96 and 1996/97 seasons. The tillage treatments were conventional and reduced tillage. Conventional tillage used animal drawn mouldboard plough and involved winter ploughing + spring ploughing at Chihota, winter ploughing only at Nharira, and spring ploughing only at Tjolotjo. Reduced tillage involved opening the planting furrows using the mouldboard plough. Weed management systems involved combinations of hoe weeding, ox-cultivation, plough weeding and banded Atrazine at 0.9 kg a.i./ha. Atrazine efficacy on weeds was less satisfactory at one site due to low soil pH and low rainfall in the 1995/96 season. When soil pH was corrected through liming, and herbicide application was done under moist soil conditions, Atrazine efficacy was good at all sites in the 1996/97 season. Although the weed management systems that included, use of the herbicide were more efficient in suppressing weed populations than mechanical methods, maize grain yield was not significantly affected. Reduced tillage increased total weed population at Chihota in the 1996/97 season, Nharira in the 1996/97 season and Tjolotjo over the two seasons. Conventional tillage and reduced tillage increased the emergence of Richardia scabra and Eleusine indica, respectively. The Atrazine treatments had low labour requirements compared to mechanical methods. When ox-cultivation and hoe weeding were initiated at 2 and 6 weeks after crop emergence, labour decreased compared to the same operation being carried out at 4 and 6 weeks after crop emergence.
546			_aEnglish
591			_a0103|AL-Maize Program|AGRIS 0102|AJ
595			_aCPC
650	1	0	_aAltitude
650	1	7	_aCropping systems _gAGROVOC _2 _91068
650	1	0	_aEleusine indica
650	1	0	_aFarm management
650	1	0	_aFarmers _gAGROVOC _91654
650	1	0	_aKenya _91167
650	1	7	_aMaize _gAGROVOC _2 _91173
650	1	0	_91234 _aRain _gAGROVOC
650	1	7	_aWeed control _gAGROVOC _2 _91308
650	1	0	_aWeeds _91309
653	0		_aCIMMYT
650	1	0	_91314 _aZea mays _gAGROVOC
650	1	0	_aTillage _gAGROVOC _97651
700	1		_aBwakaya, F., _ecoaut.
700	1		_aCIMMYT
700	1		_aMakanganise, A., _ecoaut.
700	1		_aShamudzarira, Z., _ecoaut.
700	1		_aSithole, T., _ecoaut.
942			_cPRO
999			_c10050 _d10050