1 c denitrification in six soils (alkaline vs. acid soils).

2 re impediment to production of many crops in acid soil.

3 Cassava Bacterial Blight (CBB), drought, and acid soils.

4 bserved low net nitrification rates in these acid soils.

5 ification rates are often low in subtropical acid soils.

6 ce cause a steep transition from alkaline to acid soils across natural climate gradients.

7 (P < 0.05) compared to PT0 for rice paddies, acid soils, and the first 5 years of the experiments, re

8 nts in hydroponic solutions and in naturally acid soil corresponded with their patterns of organic ac

9                                           In acid soils, however, heterotrophic denitrification was t

10                    Aluminum (Al) toxicity in acid soils is a worldwide agricultural problem that seve

11  absence of net nitrification in some highly acid soils may be due to high rates of NO3(-)-N immobili

12 ere is an abrupt transition from alkaline to acid soil pH that occurs at the point where mean annual

13 verely limiting agricultural productivity in acid-soil regions comprising upwards of 50% of the world

14 h is caused by the solubilization of Al3+ in acid soils resulting in inhibition of root growth and nu

15 strength which are representative of typical acid soil solutions.

16 ajor limiting factors for crop production on acid soils that comprise significant portions of the wor

17 is a major constraint for crop production on acid soils which compose approximately 40% of arable lan

18 grain yield reduction in crops cultivated on acid soils, which are widespread worldwide.

19 he primary limitation for crop production on acid soils, which make up 50% of the world's potentially