Water cycle:cycle is defined as the continuous movement of water from the atmosphere to the earth and from the earth to the atmosphere.
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The atmosphere receives water throughi. Rainfall or precipitation,
ii. Infiltration and percolation
Importance of water to crops
i. Water provides the medium for absorption of mineral salts.
ii. It facilitates the transfer of nutrients to other parts of plants where they are used in various metabolic processes
iii. Water is an essential raw material in the process of photosynthesis
iv. It is used for hydrolyzing food substances such as starch, proteins fats and oil for easy transmission to other parts of plants.
v. Water facilitates enzymatic activities occurring in crop plants
vi. It is a constituent of plant protoplasm
vii. The loss of water through transpiration is important for keeping the stomata open in gaseous exchange for respiration and photosynthesis
viii. It has a cooling effect on crops
ix. It helps to maintain plant tugor or turgidity
x. It helps to sustain life
xi. It helps in seed germination
Forms in which water exists in the soilThe form in which water exists in the soil include:
i. Hygroscopic water
ii. Capillary water
Ways of conserving water in the soili. Stoppage or reduction of surface water run – off
ii. Addition of human or organic manure
iii. Removal of weeds to reduce transpiration and water loss
v. Cover cropping
vi. Contour ridging
vii. Appropriate tillage
viii. Strip cropping
HERE YOU WILL FIND EVERY AVAILABLE TOPICS ABOUT AGRICULTURAL SCIENCE AND BIOLOGY. AND THE LINKS TO THEIR VARIOUS SOURCES.
1. DEVELOPMENT OF AGRICULTURE
2. IMPORTANCE OF AGRICULTURE
3. SUBSISTENCE AGRICULTURE
42. CLIMATIC FACTORS AFFECTING AGRICULTURAL PRODUCTION
47. SOLAR RADIATION