Question

why Are pulses alternated with crops like wheat and rice?

List any two factors on which time and Frequency of irrigation depends?

How do leguminous plants helps in maintaining soil fertility?

A farmer has sown the seeds too deep. What is he likely going to observe? Give reasons.

Answer 1

pulses alternated with crops like wheat and rice to improve the soil fertility .leguminous plant help in maintaining soil fertility by the nitrogen fixation as nitrogen fixing helps to do. farmers have to sow the seeds too deep because it is very important to Sow seeds at right intervals and at right depth for proper growth of plant.

Answer 2

Ans:1:Pulses are nitrogen-fixing plants that are able to incorporate nitrogen back into the soil that was lost from planting cereal crops. Thus alternating these two types of crops enables soil fertility to be kept at a reasonable rate, according to a crop farmer.

Ans:2:IRRIGATION NEED
An in-ground, automated irrigation system makes life much easier for anyone who irrigates. Unfortunately, the convenience of time-clock irrigation promotes poor watering practices. Often, a technician sets the time clock at installation, and it remains at that setting thereafter. As a result, the automated cycle doesn�t accommodate the landscape�s actual water needs.

Plant water requirements vary, depending on the species, environmental conditions and cultural practices. These factors, which include relative humidity, day length, temperature, wind speed, mowing height and fertilization, influence ET.

Transpiration is the process by which turf and other plants absorb water from the soil and transport it from roots to leaves to the atmosphere. By monitoring transpired water and water evaporated from the soil, you have a fairly good indicator of how much water plants use each day.

Because both environmental and cultural factors influence ET, water use is never constant. For example, in a study at Kansas State University, tall fescue ET ranged from 0.13 to 0.42 inches per day between July and August. This variability of turf ET emphasizes the importance of adjusting irrigation amounts to meet current demand. It also demonstrates that you can save water and improve irrigation efficiency by monitoring turf water use.


Ans:3:The plant supplies Rhizobium with sugars and Rhizobium gives the plantsoluble nitrogen.Different crops aregrown in the same field which helpsprevent soil erosion and controls the spread of soil-borne plant disease.Leguminous plants will add nitrate tothe soil which improves fertility.

Ans:4:He will observe nothing because the plant cannot make it to the surface.