Use of a Digital Camera to Monitor the Growth and Nitrogen Status of Cotton

Table 1

Selected soil physical and chemical properties (0–60 cm depth) in experiment 1.

Parameter	Year
	2010	2011
Clay (%)	21±2.23	19±1.94
Silt (%)	38±2.31	34±1.43
Sand (%)	43±3.19	41±2.26
pH	7.51±0.32	7.72±0.18
Organic matter (mg kg^−1)	25.46±0.95	26.35±1.11
Alkaline N (mg kg^−1)	60.83±2.49	58.72±1.65
Olsen P (mg kg^−1)	28.46±4.24	22.13±1.33
Available K (mg kg^−1)	342.54±54.13	313.42±32.17
Bulk density (g cm^−3)	1.26±0.32	1.27±0.19
Saturated volumetric water content (%)	30.11±0.12	32.57±0.25