the purpose of this research was to investigate the factors affecting the use of information resources and communication channels by the rey township vegetable growers as regards their prevention of soil pollution. the study consisted of all vegetable growers (n=700) in the ray county, located in tehran province, from among whom 70 vegetable growers were selected through random sampling techniq...

Globalization is influencing several agriculture aspects: market globalization has increased export from producing to consuming countries where different food safety or pesticide residue regulations apply, and has raised awareness of global problems linked to agriculture production (i.e., chemical pesticide pollution). Pests, diseases and weeds may cause significant damages to growers and the c...

Basically all organisms can be classified as determinate growers if their growth stops or almost stops at maturation, or indeterminate growers if growth is still intense after maturation. Adult size for determinate growers is relatively well defined, whereas in indeterminate growers usually two measures are used: size at maturation and asymptotic size. The latter term is in fact not a direct me...

On-farm demonstration trials have been used for many years to introduce new techniques and management practices to farmers. With new precision agriculture technology, it is now possible to work more effectively using whole fields instead of small test plots. Sugarbeet (Beta vulgaris L.) growers in the Drayton, ND, and St. Thomas, ND, sugarbeet cooperative districts have delivered sugarbeet hist...

We analyze the contract settlement data of a poultry company who contracts the production of broiler chickens with a group of independent growers. The company originally used rank-order (ordinal) tournaments to compensate their contract growers and later switched to cardinal tournaments. Based on the observed payment mechanism we construct an empirical model of a rank-order tournament game and ...

Volatile energy costs and lower profit margins have motivated many greenhouse growers in temperate climates to improve the energy efficiency of crop production. We performed experiments with dahlia (Dahlia ·hybrida Cav. ‘Figaro Mix’), French marigold (Tagetes patula L. ‘Janie Flame’), and zinnia (Zinnia elegans Jacq. ‘Magellan Pink’) to quantify the effects of constant and fluctuating temperatu...

Irrigated agricultural lands are prone to salinity problems which may imperil horticultural crops by reducing growth, yield and even qualitative traits. Eco-friendly approaches such as biostimulant application in particular protein hydrolysates from vegetal origin implemented mitigate stress effects on crops. For this reason, a greenhouse experiment spinach irrigated with increasing concentrati...

Agricultural nitrogen (N) use is a major contributor to environmental problems arising from nitrous oxide emissions and N loading groundwater. Advances in the adoption of conservation practices requires better understanding agronomic context for cropping systems. This paper tests hypotheses about how knowledge barriers influence management orchard agroecosystems. Agronomic are characterized by ...