Light is an important resource that crops and weeds compete for and so increased light interception by the crop can be used as a method of weed suppression in cereal crops. This research investigated the impact of altered availability of photosynthetically active radiation (PAR) (from crop row orientation or seeding rate) on the growth and fecundity of Lolium rigidum. Wheat and barley crops wer...

The 1996 Farm Bill was debated and passed during one of the best of times in U.S. agriculture and has presided over one of the worst of times in terms of crop prices, market incomes, and government payments. While it is not fair to lay all of crop agriculture’s price and income problems at the feet the 1996 legislation, it is fair to assign it much of the blame. Expectations were that the passa...

in this research the effects of mycorrhizal symbiosis and irrigation intervals on growth indices and grain yield of two sorghum cultivars was studied. field experiment was laid out as a split plot factorial based on randomized complete block design with three replications. irrigation intervals as main factor in three levels (7, 14 and 21days) and factorial combination of two sorghum cultivars (...

the need for more comparisons among models is widely recognized. this study aimed to compare three different modelling approaches for their capability to simulate and predict trends and patterns of winter wheat yield in western germany. the three modelling approaches included an empirical model, a process-based model (lintul2), and a metamodel derived from the process-based model. the models ou...

The goal of this study is to show the usefulness of reinforcement learning (RL) to solve a common greenhouse climate optimisation problem. The problem is to minimise the daily heating cost while achieving simultaneously two agronomic goals, namely maintaining a good crop growth and an appropriate development rate. The complexity of the problem is due to the very different time constants of thes...

The objective of this paper was to report the development of precision agriculture for rice crop production in Taiwan during past five years. Three multi-disciplinary research teams have been organized for the purposes of developing techniques required for monitoring growth status and environmental conditions for rice crop; integrating the elements necessary for fertilization recommendation sys...

concentration of co2 in the atmosphere is likely to increase up to 550 µmol mol-1 by the middle of 21st century. such an increase in the atmospheric co2 would affect plant growth, and as well the productivity of crop plants. a field experiment was conducted with two potato cultivars namely kufri surya and kufri chipsona-3 grown inside open top chambers (otcs) at ambient (385±30 µmol mol-1) vs. ...