02953nas|a2200421 i 4500 20260817162846.0 121095s1985 th uu m rtt 00| a1eng d .b10070436 AIT RSPR no. IE-85-11 Maarif, Mohammad Syamsul An application of control theory to rubber plantation management Bangkok : Asian Institute of Technology, 1985 62 p. Research studies project report ; no. IE-85-11 A research study submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology Research Studies Project Report (M. Eng.) - Asian Institute of Technology, 1985 The problem of rubber plantation management is formulated as a problem in control theory . The production of rubber trees depend on intra-rotation activities (maintenance ), stocking density, and the age of rubber trees. Th e objective of t h is study is to maximize the present value of all the future net profits over a class of in finite chain of rotation where each link in the cha in represents a uniform length rotation with identical intra-rotation activities. The optimal control is determined by applying the Pontryagin's Maximum Principle. Since data on effects of maintenance to the production is difficult to get, qualitative analysis is used in applying the control model . By using present value comparisons , the optimal rotation time T, stocking density So , and the age of restocked trees To are determined. The optimal tapping system is also determined by choosing the most profit able tapping system. Rubber plants Clarke Harry R., Chairperson Oudheusden, Dirk L. van, Examination Committee Vrat, Prem, Examination Committee Sauter-Servaes, Florian, Examination Committee US - ASEAN, Scholarship Donor Asian Institute of Technology. Research studies project report ; no. IE-85-11 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B19885 .b10070436 mnait y 240409 2 951012 m a y 3 mnait mnait mnarc 20 40 Barcode : 30050002948551 CREATED : 1995-10-13 RECORD # : i10068521 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050003110557 CREATED : 1995-10-13 RECORD # : i10068533 LPATRON : 1012522 LCHKIN : 2000-01-11 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 2 TOT RENEW : 0 Barcode : 30050160109780 CREATED : 2016-08-04 RECORD # : i12932590 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 6532 6532 0 0 0 0 MAIN MAIN mnait 2026-08-17 10.00 0 AIT RSPR no. IE-85-11 30050002948551 2026-08-17 16:28:46 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 10.00 0 AIT RSPR no. IE-85-11 30050003110557 2026-08-17 16:28:46 2 2026-08-17 20 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT RSPR no. IE-85-11 30050160109780 2026-08-17 16:28:46 2026-08-17 40