Category Agri Engineering

Classification of Salt Affected Soils

Saline Soil: Contains soluble salts, mostly chlorides and sulphates of sodium, calcium and magnesium in quantities sufficient to interfere with the physiological activities of most crop plants. The soil PH of saturation extract is 8.5 , Ec > 4 ds/m…

Causes of Water Logging

1. Adverse topography and unfavourable sub-soil geology. 2. Lack of catchment area production. 3. Rainfall characteristics.4. Seepage from canal system and higher irrigated areas. 5. Man made causes:i) Irrigation in deep verti soilii) Over irrigation6. Poor on farm water management practices. 7. Lack of…

Adverse Effect of Water Logging

1. Depletion of oxygen in root zone and increase of CO2 due to water logging. An aerobic condition adversely affects micro-organisms while harmful organisms proliferate and restrict the plant growth. 2. Physical or chemical and biological activities in the soil are…

Water Logging

Condition of land in which the sub-soil water table is located at on near the sub-surface Norms and Ministry of Water Resources Govt. of India: 1. Water logged areas- Water tables within 2m from land surface. 2. Potential area from water…

Soil –Plant – Water – Relationships

Soil –Plant –Water relation relates to the physical properties of soil and plants that effect the movement, retention and use of water. These relations must be considered in designing and operation systems. Soil is a store house of plant nutrients,…

Definitions Related to Water Requirement to Plant

1. Evaporation: It is the process during which a liquid changes into a gas. The factors effecting evaporation are air and water temperature relative humidity, wind velocity, and surface area exposed. The evaporation can be measured by the standards U.S Weather Bureau…

H.P. Requirement for Running Drip System

HP= max. flow  (lps) X total head (m)——————————————————-Motar efficiency X Pump efficiency X 76   Where, Efficiency of monoblock pump= 75% Efficiency of motor (assumed) = 80% HP= QH        ____         76 Source