Coapplication of Chicken Litter Biochar and Urea Only to Improve Nutrients Use Efficiency and Yield of Oryza sativa L. Cultivation on a Tropical Acid Soil

Table 1

Some selected chemical properties of Black Earth chicken litter biochar.

(a)

Macronutrients
pH	8.5
%
Total carbon	63.7
Fixed carbon	61.2
Nitrogen	2.8
Phosphate	2.6
Potassium	3.9
Calcium	5.9
Sulphur	0.59
Ash content	23.7

(b)

Micronutrients
Av. particle size	0.5–2 mm
mg kg^−1
Silicon	2.3
Aluminium	1.5
Potassium oxide	16.3
Boron	62
Copper	167
Manganese	1130
Zinc	856
Magnesium oxide	6.7
Arsenic	2.1
Cadmium	0.7
Chromium	9.6
Mercury	0.06
Nickel	14
Lead	12

Source: Black Earth Company in north of Bendigo, Victoria, Australia.