Looming near the pond, amid fields rendered desolate by white plastic crop covers, was a disintegrating mountain of "ecoballs"—shrink-wrapped bales of Neapolitan garbage that had been dumped all over the Campanian countryside and become a symbol of Italy's environmental crisis.
Looming near the pond, amid fields rendered desolate by white plastic crop covers, was a disintegrating mountain of "ecoballs" — shrink-wrapped bales of Neapolitan garbage that had been dumped all over the Campanian countryside and become a symbol of Italy's environmental crisis.
Sectors that follow the declining trend are crops and cereals, chemicals, rubbers and plastic, other crops, textiles and apparel, miscellaneous manufacturing and electronic equipment.
In general, the results of validation comparing calculated values with those measured on 25 days (with relative root mean square errors below 10%), show sufficient accuracy for the model to be used to estimate air, crop, plastic cover, polypropylene mulch and soil temperatures inside the greenhouse, and as a design tool to optimise the ventilation system characteristics and control settings.
The effect of film cover on physiological age was simulated by adding an increment of air temperature estimated based on soil temperature increased by plastic film and crop response (Zhang et al. 2008).
Plastic film mulch increased crop yields in the short-term compared with the conventional tillage practice.
However, the extent to which insect resistance is plastic may depend on crop genotype.
Field experiments were conducted to determine the effect of plastic mulch patterns and crop rotations on runoff, erosion and soil physical properties in 2010 and 2011 growing seasons.
The ridges and subgrooves with plastic film mulching improved crop yields, and the average yield over the four years was higher in the MC than in the CK, M0C0, M0C and MC0 by 163%, 98 %, 62 % and 21 respectively.
In this case it was the EU's environmental policy I was investigating, the farmers' dodgy crop under plastic sheeting - dodgy because of question marks over how they get their water for irrigation.
Continuous cropping under plastic greenhouses, a common practice in intensive Chinese vegetable production systems, has led to the decline of soil productivity and crop yields.
