Tag: evs

Organic matter improves soil structure, which enhances drainage and reduces the likelihood of water logging in clayey soils.

Both rainwater harvesting and watershed management are widely recognized strategies for increasing water availability for agricultural purposes.

Crops have specific requirements for temperature, photoperiod, and climate to complete their life cycles, making all the listed factors essential.

A farmer with less water resources should grow selected short term crops(e.g, paddy, green leafy vegetables) which have a life span of one or less than one year as this process provides cash flow and takes care of day to day operations cost of the farm. Another effective method called drip irrigation is also helps to save water and nutrients as the water drips slowly and directly to the roots of the plant and the evaporation is minimized. So, the correct option is "(i),(iii)".

The Taungya system is a specific agroforestry practice where crops are grown between rows of young trees, especially during the early stages of forest plantation.

The primary cause of heat buildup in cities is insolation i.e. absorption of solar radiation by roads and buildings. Storage of this heat by building material results in subsequent re-radiation. Due to transpiration of plant surface, its temperature does not rise 4-5 degree above the ambient and sometimes is cooler. This then translates into the cooling of the environment. Hence rooftop gardening reduces the overall heat absorption of the building which then reduces energy consumption. Thus the correct answer is option A.

Precision farming is a concept of crop management based on observing, testing, measuring and responding to field variability in crops. In this farming, they use research in weathers, test the soil temperature, humidity, growth and moisture.

Agricultural practices are designed to optimize conditions, thereby maximizing the yield or benefit derived from the land and resources.

A polyhouse also called polytunnel is a tunnel made of polyethelene semi-circular, square or elongated in shape. Solar radiations are used to heat up the interior. This warms the plants, soil, and other things inside the building faster than heat can escape the structure. This warmed air in interior surfaces is retained in the building by the roof and wall.Temperature, humidity and ventilation is controlled by equipment fixed in the polytunnel or by manual opening and closing of flaps. Thus plants grow under the complete controlled condition in polyhouse farming. 

Drip irrigation is the best for watering plants in a polyhouse. In drip irrigation system, water under high pressure is forced through nozzles arranged on a supporting stand at about 1 feet height. This enables watering at the base level of the plants.This watering system ensures that water does not fall on the leaves or flowers as it leads to disease and scorching problems.