Methods of leaf sampling in teak (tectona grandis) for nutrient analysis
2000
K. Sudhakara | A. Jayamadhavan | P. A. Wahid
A study was conducted in10-y-old teak plantations of Nilambur, Kerala, India, to standardise the canopyheight, time of sampling, leaf rank and diameter class of trees from which to collectleaf samples for the determination of N, P and K concentrations. Seasonal variationin the foliar N, P and K concentrations was also determined for a period of thirteenmonths starting from August 1993 to August 1994. Since mean nutrient concentrationwas high and varied little among the samples, leaves obtained from thebottom position of the crown during the time interval 0900 h to 1100 h were takenas the standard. Similarly, the second leaf rank from trees belonging to the diameterclass (16.75-20 cm) were found to be ideal for sampling. Foliar nutrient concentrationswere higher from June to September, which received high rainfall and were lowduring the drier months of January to Apri
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