Table 4 Descriptive statistical characteristics of petiole NO₃⁻-N, PO₄³⁻-P and K⁺-K at yield level of 6000–7100 kg/ha

From: Establishment of an NPK nutrient monitor system in yield-graded cotton petioles under drip irrigation

Element	Full bud stage					Full bloom stage					Full boll stage
Element	Max	Min	AV	SD	CV%	Max	Min	AV	SD	CV%	Max	Min	AV	SD	CV%
NO₃^—N (mg/L)	11000	9000	9798	608.94	6.2	8500	6500	7640	705.95	9.2	7500	5000	6556	842.29	12.9
PO₄^3—P (mg/L)	265	100	204	50.65	24.8	400	270	348	43.98	12.6	300	185	252	38.63	15.3
K⁺-K (mg/L)	10000	8000	9230	578.26	6.3	8500	6000	7574	813.36	10.7	6500	4000	5580	725.34	13.0

Max, Min, AV, SD and CV represent the maximum, minimum, average, standard deviation and coefficient of variation, respectively

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ISSN: 1746-4811

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