Results 131 to 140 of about 1,827 (176)

Short‐term evolution of phosphorus in an ultisol

Communications in Soil Science and Plant Analysis, 2000
Abstract Evolution of residual phosphate was monitored as function of time on an Ultisol without cropping in a field trial at Sembawa Rubber Research Station, South Sumatra, Indonesia. Three treatments were imposed and either triple superphosphate at a rate of 600 kg ha‐1 containing 21.54% phosphorus (P) or lime at the rate of 4.14 tons ha‐1 was ...
D. Budianta, J. Vanderdeelen
openaire   +1 more source

Ultisols: Characteristics and Impacts on Society

1997
Publisher Summary This chapter presents a brief overview of Ultisols in terms of their genesis, classification, distribution, and properties. The chapter illustrates crop management systems that have been used for agricultural production on these soils.
L.T. West, F.H. Beinroth, M.E. Sumner, B.T. Kang   +3 more
openaire   +1 more source

Response of okra to sodium nutrition in an Ultisol

Moor Journal of Agricultural Research, 2004
The essentiality of Na to the growth of okra plants in an Ultisol grown in soil culture and treated with Na concentrations of 0, 2, 4, 8, 16 mg/kg of soils as NaCl. was studied. Sodium applied at 8mg/kg of soil increased leaf area and number, plant height, water content dry matter yield and tissue N and K when compared with the control.
Aduayi, EA, Olowoyo, BA
openaire   +2 more sources

Amelioration of an acid ultisol by agricultural by‐products

Land Degradation & Development, 2011
AbstractUltisols are widely distributed in the subtropical regions of China as well as in the world. High acidity of Ultisols limits plant growth and reduces crop yields. Amelioration of an acid Ultisol was investigated by incorporating the residues of canola (Brassica campestris L.), wheat (Triticum aestivum L.), rice (Oryza sativa), corn (Zea mays ...
N. Wang, R.‐K. Xu, J.‐Y. Li
openaire   +1 more source

Chapter 8 Ultisols

1983
Publisher Summary This chapter focuses on the range of characteristics of Ultisols, the nature and variability of the pedogenic processes and the mechanisms responsible for the development of these characteristics, and relationships among different taxa in Soil Taxonomy and the genesis of Ultisols.
openaire   +1 more source

Geomorphic Relationships of Oxisols and Ultisols on Kauai, Hawaii

Soil Science Society of America Journal, 1974
Abstract A succession of Eutrustox‐Eutrorthox‐Gibbsiorthox‐Gibbsihumox occurring in northeastern Kauai, Hawaii, is shown to be a climosequence. These soils developed synchronously on basic lavas forming one geomorphic surface of Pleistocene age.
F. H. Beinroth, G. Uehara, H. Ikawa
openaire   +1 more source

Fluxes of dissolved organic carbon and nitrogen in cropland and adjacent forests in a clay-rich Ultisol of Thailand and a sandy Ultisol of Indonesia

Soil and Tillage Research, 2013
Abstract In the humid tropics, conversion of forests into croplands has the potential to alter the flux of dissolved organic matter (DOM) and influence C balance and N availability in soil. Sites located on a clay-rich Ultisol in Thailand and a highly acidic and sandy Ultisol in Indonesia were used to quantitatively evaluate effects of land use ...
Kazumichi Fujii, Shinya Funakawa, Chie Hayakawa, null Sukartiningsih, Takashi Kosaki   +4 more
openaire   +1 more source

Phosphorus response of sericea lespedeza on a georgia ultisol

Communications in Soil Science and Plant Analysis, 1989
Abstract A field study was initiated on a Davidson sandy clay loam, clayey, kaolinitic, thermic Rhodic Paleudult soil in central Georgia in 1982 to evaluate P response of high‐ and low‐tannin sericea lespedeza (Lespedeza cuneata(Dumont) G. Don) cultivars.
R.E. Joost, B.W. Mathews, C.S. Hoveland
openaire   +1 more source

Sources of soil variation in an acid Ultisol of the Philippines

Geoderma, 1995
Field-scale variation in soil fertility can be a major source of uneven crop growth on acid soils of the humid tropics, but this has not received much research attention. We used factorial kriging (FKA) to analyze processes causing spatial variation in soil chemical properties (pH, P, K, Na, Ca, Mg, Al) measured at two depths within a single field on ...
A. Dobermann, P. Goovaerts, T. George
openaire   +1 more source

Lime response of tanier in an ultisol of costa rica

Communications in Soil Science and Plant Analysis, 1996
Abstract Root crops constitute an important part in the diet of millions of people throughout the Tropics. These crops are produced by subsistence farmers in poor soils where acidity is the most common problem and liming materials, such as limestone, are scarce and expensive.
R. Salas, E. Molina, D. Bouldin
openaire   +1 more source