Article Per Year (5 Year)
p-Index From 2020 - 2025
0
P-Index
This Author published in this journals
All Journal Journal of Tropical Soils
Presto J Saputra
Center for Tropical Adverse Soils Studies, Study Program of Natural Resource Management, Post Graduate Program, Lambung Mangkurat University, Gedung I, Banjarbaru, South Kalimantan, 70714
Agriculture, Biological Sciences & Forestry Environmental Science

Published : 1 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 1 Documents
Search

 1 
Nitrogen Nutrition of Some Local Rice Varieties Grown without Fertilizer on Acid Sulphate Soil Area in South Kalimantan Erry Purnomo; Toshihiro Hasegawa; Yasuyuki Hashidoko; Presto J Saputra; Mitsuru Osaki
JOURNAL OF TROPICAL SOILS Vol 14, No 1: January 2009
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2009.v14i1.41-47

Abstract

Banjarese farmers in South Kalimantan apply a very minimum nitrogen (N) fertilizer in growing local rice. This practice has been adopted for many years. Yet, the grain yield level at farmers’ field is not necessary low. We are questioning about N sources for the crop. This study only focuses on measuring net N mineralization in association with N uptake. We grew three rice varieties at four sites in rice growing area of South Kalimantan. The net N accumulation in soil and water, plant top biomass, N concentration of plant tissue and N uptake were measured on monthly basis. The results showed that all rice varieties grown in the 4 locations took up more N than from N mineralized from the organic matter. The higher N in the crop indicates that there are other sources of N for the local rice such as N fixed by microorganisms.
Co-Authors Erry Purnomo Mitsuru Osaki Toshihiro Hasegawa Yasuyuki Hashidoko