Data/hora: 20/06/2024 23:00:43

Biblioteca(s): 	Embrapa Mandioca e Fruticultura.	
Data corrente: 	21/08/1995	
Data da última atualização: 	21/08/1995	
Autoria: 	OPARA-NADI, O.; LAL, R.	
Afiliação: 	International Institute of Tropical Agriculture, Ibadan, Nigeria.	
Título: 	Effects of plant population on soil structure, soil moisture depletion and on yield of cassava (Manihot esculenta) on an Ultisol in southeast nigeria.	
Ano de publicação: 	1987	
Fonte/Imprenta: 	J. Sci. Food Agric., v.38, p.291-302, 1987	
Idioma: 	Inglês	
Conteúdo: 	The effects of four cassava populations (8, 10, 13 and 20 x 10sobre3 plants per ha -1) on soil physical properties, moisture retention characteristics, moisture potential profiles and moisture depletion ptterns were compared with uncropped plots receiving no cultivation of an  Ultisol in the humid region in eastern Nigeria. The growing of cassava decreased the bulk density of 0-10 cm depth by 17% in comparison with the uncultivated soil (1.53 Mg m-3) The bulk  density of the 10-20 cm depth was sigher for the cropped than the uncropped control plots. The moisture retention below a suction of pF 2.4 for 0-10 cm depth was less for the uncultivated control than for soil growing cassava. The reverse was found in moisture retention characteristics of the 20-40 cm depth especially for low suction ranges of pF below -0.8. The 0-10 cm soil layer of uncropped control dried more rapidly than cropped soil. Below 10 cm, however, cassava depleted moisture reserves more rapidly than in uncropped control. The effect of plant population on soil moisture depletion was more conspicuous within than between rows. Significant differences in water flux and in water uptake from different horizons were observed among various population densities. The total water loss was the highest for the least plant population for the between-row zone, and for the highest population for the withinrow zone. Plant population had no effect on tuber and stalk yield.	
Palavras-Chave: 	Plant population; Soil moisture; Ultisol.	
Thesaurus Nal: 	cassava; soil structure.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Mandioca e Fruticultura (CNPMF)	
Exemplares: 	CNPMF - (15834-1) - ADC - SP - -- - S5389 -  - S5389 - DIS