Effects of Land Use Change and Seasonality of Precipitation on Soil Nitrogen in a Dry Tropical Forest Area in the Western Llanos of Venezuela

Table 5

Microbial nitrogen percentage in the total soil nitrogen in forest and pastures.

Season	Depth  (cm)	Nmic/TN (%)
		Forest	YP	OP
End rainy season	0–5	1.3 ± 0.9^Aa	0.2 ± 0.1^Ab	0.7 ± 0.4^Aab
Dry season	0–5	0.5 ± 0.5^Ba	0.7 ± 0.4^Ba	0.5 ± 0.4^Aa
Early rainy season	0–5	0.8 ± 0.4^ABab	0.6 ± 0.3^Ba	1.1 ± 0.3^Bb

Mean values ± standard deviation. Different lowercase letters indicate significant differences between sites (). Different capital letters indicate significant differences between seasons (). Nmic: microbial nitrogen; TN: total nitrogen; YP: 5-year-old pasture; OP: 18-year-old pasture.