@article{jones_hesketh_kamprath_bowen_1974, title={DEVELOPMENT OF A NITROGEN-BALANCE FOR COTTON GROWTH MODELS - FIRST APPROXIMATION}, volume={14}, ISSN={["1435-0653"]}, DOI={10.2135/cropsci1974.0011183X001400040014x}, abstractNote={Daily growth values of cotton ( Gossypium hirsutum L.) were calculated based on the carbohydrate balance of SIMCOT II, a simulation model of cotton growth and development. The daily N requirements for new growth of leaves, stems, roots, burrs, and seed were calculated based on maximum and minimum N concentration for these plant parts. Daily N absorption depended on the availability of N in the soil pool and new growth requirements. If the absorbed N was less than the required amount, partitioning functions determined the distribution of available N into each sink. During periods of N shortages, some N reserves were supplied for new growth from the breakdown of N compounds in the older leaves and stems. Depending on the level of N shortage, new growth was slowed, bolls and squares were abscised, and some leaves were shed. The model shows that, based on the N balance, growth can be restricted and reproductive organs aborted after SIMCOT II runs its normal course for a day during the boll setting period. Simulated fruiting characteristics and yield curves were similar to those of real plants.}, number={4}, journal={CROP SCIENCE}, author={JONES, JW and HESKETH, JD and KAMPRATH, EJ and BOWEN, HD}, year={1974}, pages={541–546} }