000			03195nam a22004337a 4500
001			G67748
003			MX-TxCIM
005			20190319215316.0
008			121211s ||||f| 0 p|p||0|| |
020			_a970-648-006-4
040			_aMX-TxCIM
072		0	_aF01
072		0	_aF04
082	0	4	_a631.45 _bWAD
100	1		_aPhiri, A.D.K. _uSoil Fertility Research for Maize-Based Farming Systems in Malawi and Zimbabwe; Mutare, (Zimbabwe); 7-11 Jul 1997. Proceedings of the Soil Fertility Network Results and Planning Workshop
110	2		_aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico)
245	0	0	_aUndersowing maize with Sesbania sesban in Southern Malawi: _b 1. Tree growth, biomass yields and maize responses to N source at three landscape positions
260			_aHarare (Zimbabwe) _bSoil Fert Net|CIMMYT : _c1998
340			_aPrinted
520			_aMany soils of Sub-Saharan Africa are depleted of soil organic matter, an important source for organic nitrogen and phosphorus. This organic matter depletion arises largely from continuous maize cultivation on small land holdings. The situation is usually aggravated by high human population pressure which forces farmers to cultivate on steep and fragile slopes that are vulnerable to runoff and soil erosion. The objectives of this study were [1] to determine growth, survival, biomass and quality of Sesbania at three landscape positions, and [2] to assess agronomic yields of maize in response to nitrogen source and landscape position.|An on-farm experiment consisted of three landscape positions combined factorially with three nitrogen sources in a randomized complete block design involving 40 farmers who served as blocks (replicates). The three landscape positions were: valley bottom (0 - 12%), dambo margins (0 - 12%), and steep slopes (>12%). Sesbania sesban and CAN served as organic and inorganic N sources, respectively, while the control treatment received no external source of N.|Plant survival, number of primary branches per plant, stem diameter, leafy and woody dry matter yields and stack volume of Sesbania were significantly different at the three landscape positions, as was maize grain yield. Maize grain yield from the inorganic source of N was significantly higher (P<0.05) than maize yield from the control source though not significantly different from the organic source. These results indicate that there is potential for tree legumes to contribute to soil fertility under relay intercropping of maize and Sesbania sesban.|
546			_aEnglish
591			_a9906|AGRIS 9902|R98-99ANALY
593			_aJose Juan Caballero
595			_aCPC
650	1	0	_aLandscape
650	1	0	_aMalawi
650	1	0	_aPlant production _91212
650	1	0	_91801 _aSowing _gAGROVOC
653	0		_aCIMMYT
653	0		_aSoil Fert Net
650	1	0	_91314 _aZea mays _gAGROVOC
650	1	0	_91952 _aSoil fertility _gAGROVOC
650	1	0	_91313 _aYields _gAGROVOC
650	1	0	_91190 _aNitrogen fertilizers _gAGROVOC
700	1		_aKanyama-Phiri, G.Y., _ecoaut.
700	1		_aSnapp, S.S., _ecoaut.
700	1		_aWaddington, S.R.|Murwira, H.K.|Kumwenda, J.D.T.|Hikwa, D.|Tagwira, F. _eeds.
942			_cPRO
999			_c4233 _d4233