Soil Fertility Problems in the Developed and in the Developing World

1991 ◽  
pp. 493-506
Author(s):  
K. Harmsen
Keyword(s):  
Soil Fertility ◽  
Developing World ◽  
Fertility Problems

scholarly journals A Method for the Study of Soil Fertility Problems

1910 ◽  
Vol 3 (3) ◽  
pp. 297-300 ◽  
Author(s):  
Jacob G. Lipman
Keyword(s):  
Soil Fertility ◽  
The Other ◽  
Nitrogen Compounds ◽  
Available Nitrogen ◽  
Field Peas ◽  
Fertility Problems ◽  
Dark Green ◽  
Abundant Supply ◽  
Fibrous Roots ◽  
Surrounding Soil

Several years ago the writer's attention was called to the apparently favourable influence of field peas on oats when the two were grown together. The rank growth of the oats, their dark-green colour and the delayed ripening gave every indication of an abundant supply of available nitrogen compounds. On the other hand, oats seeded without the peas, at about the same time, were less rank in their growth and matured at an earlier date. Further observation and inquiry strengthened the impression in the writer's mind that the associative growth of legumes and non-legumes is frequently advantageous to the latter in that they are supplied with nitrogen compounds derived either from the decay of the fibrous roots of the legumes, or from the soluble materials passing out of the roots into the surrounding soil.

Herbaceous Legumes: The Panacea for West African Soil Fertility Problems?

2001 ◽  
Author(s):  
Guanglong Tian ◽  
Fusako Ishida ◽  
Dyno Keatinge ◽  
Steffen Schulz ◽  
Robert J. Carsky ◽  
...  
Keyword(s):  
Soil Fertility ◽  
West African ◽  
Herbaceous Legumes ◽  
African Soil ◽  
Fertility Problems

Soil Fertility Problems in Cetnral Rechna Doab

1999 ◽  
Vol 2 (4) ◽  
pp. 1355-1357 ◽  
Author(s):  
Muhammad Arshad ◽  
Abida Akram
Keyword(s):  
Soil Fertility ◽  
Fertility Problems

scholarly journals Soil fertility characterisation of teak (Tectona grandis L.f.) plantations in Central America

Soil Research ◽  
2015 ◽  
Vol 53 (4) ◽  
pp. 423 ◽  
Author(s):  
Jesús Fernández-Moya ◽  
Alfredo Alvarado ◽  
Rafael Mata ◽  
Helga Thiele ◽  
Jose Manuel Segura ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Central America ◽  
Soil Nutrient ◽  
Tectona Grandis ◽  
High Fertility ◽  
Important Species ◽  
P Deficiency ◽  
Teak Plantations ◽  
Fertility Problems ◽  
Tectona Grandis L.F

Teak (Tectona grandis L.f.) is an important species in the worldwide quality tropical hardwood sector, which has gained significance in Central America since the first large plantations were established in the 1980s. The present work is a descriptive study that aims to: (1) analyse and characterise the general soil patterns which may be influencing teak plantations in Central America; (2) assess differences between countries and sub-regions; (3) create a global framework to help contextualise the soil fertility analyses conducted at sub-regional or farm level, and (4) determine the main problems associated with soil fertility in the region. Soil fertility was measured at 684 sites in Costa Rica, Guatemala and Panama. Although teak is considered to be a species with high soil nutrient requirements, and high fertility is usually assumed in teak plantations, the results show that this species has been planted in a wide variety of soils, including many with serious fertility problems (e.g. Ultisols and perhaps Oxisols) or with added difficulties due to their physical properties (e.g. Vertisols). The present analysis reveals a general K deficiency in the Central American teak plantations, where P deficiency and acidity toxicity are also relatively common problems. These soil fertility problems probably stem from poor site selection by forest managers in the 80s and 90s. Hence, although soil fertility is carefully evaluated when most teak plantations are established today, managers have to deal with soil fertility deficiencies in many sites where teak was established some years ago.

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