%0 Journal Article
%T The identification of macro nutrient status of superior teak plantation (Tectona grandis Lin.F) by means of DRIS norms (Diagnosis and Recommendation Integrated System) in Indonesia
%A Cahyono Agus
%A Mochamad Chanan
%A Ris Hadi Purwanto
%A Sugi Purwanta
%A Suryo Hardiwinoto
%J Forest Science and Technology
%D 2019
%R https://doi.org/10.1080/21580103.2018.1544935
%X Abstract The improvement in forest productivity by considering the balance of nutrient input-output is the proper choice. This research aimed at investigating the macro nutrient status of a teak plantation in Indonesia. The quantitative measurement of the nutritional status of a plantation was done by picking sample plantations and doing laboratory analysis. The determination of macronutrition status was conducted by means of Diagnosis and Recommendation Integrated System (DRIS), that is a diagnostic method to measure the balance of nutrients before designing silvicultural treatments. Index analysis on teak has resulted in a macronutrient index (N, P, K, Ca, and Mg); respectively ¨C8.40, ¨C1.70, ¨C4.17, 4.98 and 9.28. The availability levels of nutrients from the highest to the lowest were Mg£¿>£¿Ca£¿>£¿P > K£¿>£¿N. Mg and Ca have shown positive index values; this implies that the nutrients are sufficient. N, K, and P have shown negative index values; this implies that the nutrients are less available, and thus growth-limiting nutrients for teak. It is recommended that silvicultural treatments be conducted on teak by means of balanced nutrient inputs, to be specific N, P, and K to achieve maximum growth of teak
%U https://www.tandfonline.com/doi/full/10.1080/21580103.2018.1544935